./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:36:02,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:36:02,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:36:02,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:36:02,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:36:02,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:36:02,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:36:02,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:36:02,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:36:02,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:36:02,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:36:02,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:36:02,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:36:02,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:36:02,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:36:02,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:36:02,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:36:02,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:36:02,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:36:02,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:36:02,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:36:02,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:36:02,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:36:02,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:36:02,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:36:02,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:36:02,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:36:02,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:36:02,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:36:02,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:36:02,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:36:02,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:36:02,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:36:02,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:36:02,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:36:02,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:36:02,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:36:02,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:36:02,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:36:02,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:36:02,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:36:02,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:36:02,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:36:02,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:36:02,776 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:36:02,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:36:02,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:36:02,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:36:02,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:36:02,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:36:02,778 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:36:02,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:36:02,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:36:02,779 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:36:02,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:36:02,780 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:36:02,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:36:02,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:36:02,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:36:02,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:36:02,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:36:02,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:36:02,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:36:02,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:36:02,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e [2021-12-21 12:36:02,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:36:03,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:36:03,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:36:03,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:36:03,008 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:36:03,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-12-21 12:36:03,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701e88155/7b5c5717cab548cdb0344f3cecfc201c/FLAG6c21888c4 [2021-12-21 12:36:03,428 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:36:03,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-12-21 12:36:03,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701e88155/7b5c5717cab548cdb0344f3cecfc201c/FLAG6c21888c4 [2021-12-21 12:36:03,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/701e88155/7b5c5717cab548cdb0344f3cecfc201c [2021-12-21 12:36:03,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:36:03,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:36:03,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:36:03,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:36:03,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:36:03,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dea045b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03, skipping insertion in model container [2021-12-21 12:36:03,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:36:03,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:36:03,582 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2021-12-21 12:36:03,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:36:03,612 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:36:03,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2021-12-21 12:36:03,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:36:03,656 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:36:03,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03 WrapperNode [2021-12-21 12:36:03,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:36:03,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:36:03,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:36:03,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:36:03,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,683 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-21 12:36:03,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:36:03,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:36:03,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:36:03,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:36:03,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:36:03,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:36:03,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:36:03,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:36:03,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (1/1) ... [2021-12-21 12:36:03,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:36:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:03,757 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) [2021-12-21 12:36:03,758 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 [2021-12-21 12:36:03,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:36:03,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:36:03,784 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:36:03,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:36:03,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:36:03,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:36:03,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:36:03,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:36:03,829 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:36:03,830 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:36:03,918 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:36:03,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:36:03,923 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 12:36:03,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:36:03 BoogieIcfgContainer [2021-12-21 12:36:03,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:36:03,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:36:03,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:36:03,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:36:03,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:36:03" (1/3) ... [2021-12-21 12:36:03,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c218bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:36:03, skipping insertion in model container [2021-12-21 12:36:03,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:36:03" (2/3) ... [2021-12-21 12:36:03,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c218bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:36:03, skipping insertion in model container [2021-12-21 12:36:03,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:36:03" (3/3) ... [2021-12-21 12:36:03,929 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2021-12-21 12:36:03,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:36:03,933 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:36:03,964 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:36:03,969 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 [2021-12-21 12:36:03,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:36:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 12:36:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 12:36:03,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:03,984 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:03,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:03,987 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-21 12:36:03,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002684877] [2021-12-21 12:36:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:04,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:36:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:36:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:36:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 12:36:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:04,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002684877] [2021-12-21 12:36:04,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002684877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:36:04,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:36:04,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:36:04,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118219452] [2021-12-21 12:36:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:04,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:36:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:36:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:36:04,197 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 12:36:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:04,221 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-21 12:36:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:36:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-21 12:36:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:04,234 INFO L225 Difference]: With dead ends: 67 [2021-12-21 12:36:04,234 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 12:36:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:36:04,243 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:04,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 12:36:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-21 12:36:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 12:36:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-21 12:36:04,282 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-21 12:36:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:04,283 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-21 12:36:04,283 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 12:36:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-21 12:36:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 12:36:04,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:04,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:04,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:36:04,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-21 12:36:04,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940478541] [2021-12-21 12:36:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:04,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:04,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348898518] [2021-12-21 12:36:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:04,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:04,325 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) [2021-12-21 12:36:04,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:36:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:36:04,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 12:36:04,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:36:04,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940478541] [2021-12-21 12:36:04,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348898518] [2021-12-21 12:36:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348898518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:36:04,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:36:04,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:36:04,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692662797] [2021-12-21 12:36:04,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:04,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:36:04,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:04,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:36:04,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:36:04,519 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:04,620 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-21 12:36:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:36:04,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-21 12:36:04,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:04,623 INFO L225 Difference]: With dead ends: 50 [2021-12-21 12:36:04,623 INFO L226 Difference]: Without dead ends: 43 [2021-12-21 12:36:04,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:36:04,627 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:04,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:36:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-21 12:36:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-21 12:36:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-21 12:36:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-21 12:36:04,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-21 12:36:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:04,636 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-21 12:36:04,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-21 12:36:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 12:36:04,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:04,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:04,854 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 [2021-12-21 12:36:04,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:04,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-21 12:36:04,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:04,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254773093] [2021-12-21 12:36:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:04,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:04,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:04,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204753449] [2021-12-21 12:36:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:04,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:04,869 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) [2021-12-21 12:36:04,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:36:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 12:36:04,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:36:05,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:05,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254773093] [2021-12-21 12:36:05,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:05,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204753449] [2021-12-21 12:36:05,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204753449] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 12:36:05,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:36:05,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-12-21 12:36:05,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782759908] [2021-12-21 12:36:05,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:05,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:36:05,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:36:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:36:05,438 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:05,494 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-21 12:36:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:36:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-21 12:36:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:05,496 INFO L225 Difference]: With dead ends: 49 [2021-12-21 12:36:05,496 INFO L226 Difference]: Without dead ends: 47 [2021-12-21 12:36:05,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:36:05,497 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:05,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-21 12:36:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-21 12:36:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-21 12:36:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-21 12:36:05,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-21 12:36:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-21 12:36:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-21 12:36:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 12:36:05,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:05,505 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:05,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:05,722 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 [2021-12-21 12:36:05,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-21 12:36:05,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:05,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997945210] [2021-12-21 12:36:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:05,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:05,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:05,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474436120] [2021-12-21 12:36:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:05,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:05,734 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) [2021-12-21 12:36:05,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:36:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 12:36:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 12:36:05,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 12:36:05,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:05,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997945210] [2021-12-21 12:36:05,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:05,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474436120] [2021-12-21 12:36:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474436120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:05,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:05,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-21 12:36:05,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858326620] [2021-12-21 12:36:05,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:05,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:36:05,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:36:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:36:05,932 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 12:36:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:06,079 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-21 12:36:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 12:36:06,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-21 12:36:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:06,083 INFO L225 Difference]: With dead ends: 99 [2021-12-21 12:36:06,083 INFO L226 Difference]: Without dead ends: 92 [2021-12-21 12:36:06,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:36:06,084 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:06,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 308 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:36:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-21 12:36:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-21 12:36:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-21 12:36:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-21 12:36:06,096 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-21 12:36:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:06,097 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-21 12:36:06,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 12:36:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-21 12:36:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 12:36:06,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:06,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:06,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 12:36:06,307 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 [2021-12-21 12:36:06,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-21 12:36:06,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:06,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551817554] [2021-12-21 12:36:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:06,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:06,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:06,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184713261] [2021-12-21 12:36:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:06,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:06,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:06,320 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) [2021-12-21 12:36:06,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:36:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:06,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 12:36:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:36:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:06,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551817554] [2021-12-21 12:36:06,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184713261] [2021-12-21 12:36:06,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184713261] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 12:36:06,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:36:06,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-12-21 12:36:06,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033816603] [2021-12-21 12:36:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:06,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:36:06,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:36:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:36:06,767 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 12:36:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:06,821 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-21 12:36:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:36:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-21 12:36:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:06,824 INFO L225 Difference]: With dead ends: 75 [2021-12-21 12:36:06,824 INFO L226 Difference]: Without dead ends: 73 [2021-12-21 12:36:06,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:36:06,825 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:06,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 172 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-21 12:36:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-21 12:36:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-21 12:36:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-21 12:36:06,848 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-21 12:36:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:06,848 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-21 12:36:06,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 12:36:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-21 12:36:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 12:36:06,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:06,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:06,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:07,049 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 [2021-12-21 12:36:07,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-21 12:36:07,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018070165] [2021-12-21 12:36:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:07,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:07,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:07,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638093417] [2021-12-21 12:36:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:07,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:07,060 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) [2021-12-21 12:36:07,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:36:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:07,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 12:36:07,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:07,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:07,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018070165] [2021-12-21 12:36:07,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:07,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638093417] [2021-12-21 12:36:07,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638093417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:07,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:07,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-21 12:36:07,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535030014] [2021-12-21 12:36:07,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:07,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:36:07,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:07,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:36:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:36:07,354 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:07,394 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2021-12-21 12:36:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:36:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-12-21 12:36:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:07,396 INFO L225 Difference]: With dead ends: 87 [2021-12-21 12:36:07,396 INFO L226 Difference]: Without dead ends: 85 [2021-12-21 12:36:07,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:36:07,399 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:07,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 191 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-21 12:36:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-21 12:36:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-12-21 12:36:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 60 states have internal predecessors, (71), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 12:36:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-12-21 12:36:07,419 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 38 [2021-12-21 12:36:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:07,420 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-12-21 12:36:07,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-12-21 12:36:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 12:36:07,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:07,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:07,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:07,642 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 [2021-12-21 12:36:07,642 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-21 12:36:07,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:07,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943351757] [2021-12-21 12:36:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:07,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:07,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:07,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135744092] [2021-12-21 12:36:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:07,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:07,655 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) [2021-12-21 12:36:07,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:36:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:36:07,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:36:07,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:36:07,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:07,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943351757] [2021-12-21 12:36:07,753 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:07,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135744092] [2021-12-21 12:36:07,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135744092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:36:07,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:36:07,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:36:07,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728013003] [2021-12-21 12:36:07,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:07,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:36:07,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:36:07,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:36:07,754 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 12:36:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:07,792 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2021-12-21 12:36:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:36:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-21 12:36:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:07,794 INFO L225 Difference]: With dead ends: 112 [2021-12-21 12:36:07,794 INFO L226 Difference]: Without dead ends: 110 [2021-12-21 12:36:07,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:36:07,796 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:07,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-21 12:36:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-12-21 12:36:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 71 states have internal predecessors, (86), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 12:36:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2021-12-21 12:36:07,825 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 43 [2021-12-21 12:36:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:07,826 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2021-12-21 12:36:07,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 12:36:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2021-12-21 12:36:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 12:36:07,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:07,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:07,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:08,047 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 [2021-12-21 12:36:08,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:08,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-12-21 12:36:08,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:08,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926894651] [2021-12-21 12:36:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:08,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:08,057 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:08,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601208333] [2021-12-21 12:36:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:08,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:08,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:08,058 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) [2021-12-21 12:36:08,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:36:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 12:36:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:08,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:08,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926894651] [2021-12-21 12:36:08,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601208333] [2021-12-21 12:36:08,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601208333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:36:08,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:36:08,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-21 12:36:08,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137460996] [2021-12-21 12:36:08,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:08,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:36:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:36:08,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:36:08,304 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 12:36:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:08,406 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2021-12-21 12:36:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:36:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-12-21 12:36:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:08,407 INFO L225 Difference]: With dead ends: 135 [2021-12-21 12:36:08,407 INFO L226 Difference]: Without dead ends: 133 [2021-12-21 12:36:08,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:36:08,408 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:08,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:36:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-21 12:36:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-12-21 12:36:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 84 states have internal predecessors, (102), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-21 12:36:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 177 transitions. [2021-12-21 12:36:08,418 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 177 transitions. Word has length 43 [2021-12-21 12:36:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:08,418 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 177 transitions. [2021-12-21 12:36:08,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 12:36:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 177 transitions. [2021-12-21 12:36:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 12:36:08,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:08,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:08,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:08,636 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 [2021-12-21 12:36:08,636 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:08,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-12-21 12:36:08,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:08,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578074747] [2021-12-21 12:36:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:08,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:08,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:08,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373046550] [2021-12-21 12:36:08,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:36:08,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:08,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:08,646 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) [2021-12-21 12:36:08,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:36:08,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:36:08,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:36:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:36:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:36:08,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:36:08,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:08,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578074747] [2021-12-21 12:36:08,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:08,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373046550] [2021-12-21 12:36:08,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373046550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:36:08,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:36:08,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:36:08,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566186985] [2021-12-21 12:36:08,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:36:08,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:36:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:36:08,738 INFO L87 Difference]: Start difference. First operand 129 states and 177 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:08,793 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2021-12-21 12:36:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:36:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-21 12:36:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:08,794 INFO L225 Difference]: With dead ends: 168 [2021-12-21 12:36:08,794 INFO L226 Difference]: Without dead ends: 112 [2021-12-21 12:36:08,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 12:36:08,795 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:08,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-21 12:36:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2021-12-21 12:36:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 12:36:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2021-12-21 12:36:08,803 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 43 [2021-12-21 12:36:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:08,803 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2021-12-21 12:36:08,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:36:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2021-12-21 12:36:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 12:36:08,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:08,804 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:08,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:09,019 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 [2021-12-21 12:36:09,020 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-21 12:36:09,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:09,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842850547] [2021-12-21 12:36:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:09,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:09,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:09,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114838101] [2021-12-21 12:36:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:09,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:09,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:09,030 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) [2021-12-21 12:36:09,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:36:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:09,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:36:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-21 12:36:09,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:36:09,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:09,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842850547] [2021-12-21 12:36:09,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:09,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114838101] [2021-12-21 12:36:09,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114838101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:36:09,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:36:09,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:36:09,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358141774] [2021-12-21 12:36:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:09,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:36:09,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:36:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:36:09,153 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:36:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:09,189 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-12-21 12:36:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:36:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-21 12:36:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:09,190 INFO L225 Difference]: With dead ends: 154 [2021-12-21 12:36:09,190 INFO L226 Difference]: Without dead ends: 152 [2021-12-21 12:36:09,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:36:09,191 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:09,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-21 12:36:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-12-21 12:36:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-21 12:36:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-12-21 12:36:09,203 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-12-21 12:36:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:09,203 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-12-21 12:36:09,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 12:36:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-12-21 12:36:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 12:36:09,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:09,204 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2021-12-21 12:36:09,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:09,419 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 [2021-12-21 12:36:09,419 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1402581238, now seen corresponding path program 1 times [2021-12-21 12:36:09,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956919390] [2021-12-21 12:36:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:09,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:09,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:09,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489026076] [2021-12-21 12:36:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:09,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:09,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:09,430 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) [2021-12-21 12:36:09,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 12:36:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 12:36:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 12:36:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-21 12:36:09,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956919390] [2021-12-21 12:36:09,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489026076] [2021-12-21 12:36:09,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489026076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:09,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:09,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-21 12:36:09,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381062697] [2021-12-21 12:36:09,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:09,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:36:09,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:09,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:36:09,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:36:09,644 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 12:36:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:09,696 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-12-21 12:36:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:36:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2021-12-21 12:36:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:09,699 INFO L225 Difference]: With dead ends: 142 [2021-12-21 12:36:09,699 INFO L226 Difference]: Without dead ends: 140 [2021-12-21 12:36:09,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:36:09,700 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:09,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 142 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-21 12:36:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-12-21 12:36:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 83 states have internal predecessors, (88), 53 states have call successors, (53), 10 states have call predecessors, (53), 10 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-21 12:36:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-12-21 12:36:09,723 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 60 [2021-12-21 12:36:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:09,724 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-12-21 12:36:09,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 12:36:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-12-21 12:36:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 12:36:09,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:09,725 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:09,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:09,944 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 [2021-12-21 12:36:09,944 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-21 12:36:09,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:09,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007992427] [2021-12-21 12:36:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:09,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:09,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:09,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744984453] [2021-12-21 12:36:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:09,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:09,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:09,984 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) [2021-12-21 12:36:09,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 12:36:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:10,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 12:36:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 12:36:10,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 12:36:10,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007992427] [2021-12-21 12:36:10,962 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744984453] [2021-12-21 12:36:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744984453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:10,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:10,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-21 12:36:10,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721366303] [2021-12-21 12:36:10,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:10,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 12:36:10,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 12:36:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-21 12:36:10,964 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 12:36:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:17,358 INFO L93 Difference]: Finished difference Result 281 states and 409 transitions. [2021-12-21 12:36:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 12:36:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-12-21 12:36:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:17,360 INFO L225 Difference]: With dead ends: 281 [2021-12-21 12:36:17,360 INFO L226 Difference]: Without dead ends: 277 [2021-12-21 12:36:17,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 12:36:17,361 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 147 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:17,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 388 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-21 12:36:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-21 12:36:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 228. [2021-12-21 12:36:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 140 states have internal predecessors, (159), 81 states have call successors, (81), 13 states have call predecessors, (81), 13 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-21 12:36:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 320 transitions. [2021-12-21 12:36:17,396 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 320 transitions. Word has length 60 [2021-12-21 12:36:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:17,396 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 320 transitions. [2021-12-21 12:36:17,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 12:36:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 320 transitions. [2021-12-21 12:36:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 12:36:17,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:17,397 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:17,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:17,605 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 [2021-12-21 12:36:17,606 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:17,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-12-21 12:36:17,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:17,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136515782] [2021-12-21 12:36:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:17,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:17,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:17,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217789241] [2021-12-21 12:36:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:17,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:17,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:17,619 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) [2021-12-21 12:36:17,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 12:36:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 12:36:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-21 12:36:17,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-21 12:36:18,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136515782] [2021-12-21 12:36:18,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:18,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217789241] [2021-12-21 12:36:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217789241] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 12:36:18,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:36:18,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2021-12-21 12:36:18,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794089830] [2021-12-21 12:36:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:36:18,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:36:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:36:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-21 12:36:18,080 INFO L87 Difference]: Start difference. First operand 228 states and 320 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 12:36:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:18,153 INFO L93 Difference]: Finished difference Result 234 states and 325 transitions. [2021-12-21 12:36:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:36:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-12-21 12:36:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:18,155 INFO L225 Difference]: With dead ends: 234 [2021-12-21 12:36:18,155 INFO L226 Difference]: Without dead ends: 232 [2021-12-21 12:36:18,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:36:18,156 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:18,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:36:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-21 12:36:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-21 12:36:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 143 states have internal predecessors, (162), 81 states have call successors, (81), 14 states have call predecessors, (81), 14 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-21 12:36:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 323 transitions. [2021-12-21 12:36:18,198 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 323 transitions. Word has length 70 [2021-12-21 12:36:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:18,199 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 323 transitions. [2021-12-21 12:36:18,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 12:36:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 323 transitions. [2021-12-21 12:36:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 12:36:18,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:18,200 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:18,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:18,416 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 [2021-12-21 12:36:18,416 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-12-21 12:36:18,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:18,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531927902] [2021-12-21 12:36:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:18,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:18,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:18,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958711446] [2021-12-21 12:36:18,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:18,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:18,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:18,425 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) [2021-12-21 12:36:18,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 12:36:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:36:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 12:36:18,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-21 12:36:18,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531927902] [2021-12-21 12:36:18,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:18,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958711446] [2021-12-21 12:36:18,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958711446] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:18,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:18,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-21 12:36:18,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827519879] [2021-12-21 12:36:18,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 12:36:18,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 12:36:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:36:18,834 INFO L87 Difference]: Start difference. First operand 232 states and 323 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-21 12:36:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:19,168 INFO L93 Difference]: Finished difference Result 347 states and 478 transitions. [2021-12-21 12:36:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:36:19,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 68 [2021-12-21 12:36:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:19,170 INFO L225 Difference]: With dead ends: 347 [2021-12-21 12:36:19,170 INFO L226 Difference]: Without dead ends: 228 [2021-12-21 12:36:19,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-12-21 12:36:19,173 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 45 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:19,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 415 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:36:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-21 12:36:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-12-21 12:36:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 124 states have internal predecessors, (137), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 71 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-21 12:36:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 290 transitions. [2021-12-21 12:36:19,213 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 290 transitions. Word has length 68 [2021-12-21 12:36:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:19,214 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 290 transitions. [2021-12-21 12:36:19,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-21 12:36:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 290 transitions. [2021-12-21 12:36:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-21 12:36:19,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:19,219 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 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] [2021-12-21 12:36:19,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:19,436 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 [2021-12-21 12:36:19,436 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 930066712, now seen corresponding path program 1 times [2021-12-21 12:36:19,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737362624] [2021-12-21 12:36:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:19,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:19,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:19,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907396557] [2021-12-21 12:36:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:19,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:19,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:19,469 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) [2021-12-21 12:36:19,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 12:36:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 12:36:19,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-21 12:36:19,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-21 12:36:20,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737362624] [2021-12-21 12:36:20,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907396557] [2021-12-21 12:36:20,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907396557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:20,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:20,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-21 12:36:20,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555420895] [2021-12-21 12:36:20,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:20,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 12:36:20,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 12:36:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-21 12:36:20,315 INFO L87 Difference]: Start difference. First operand 210 states and 290 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-21 12:36:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:36:21,040 INFO L93 Difference]: Finished difference Result 317 states and 439 transitions. [2021-12-21 12:36:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 12:36:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 85 [2021-12-21 12:36:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:36:21,042 INFO L225 Difference]: With dead ends: 317 [2021-12-21 12:36:21,043 INFO L226 Difference]: Without dead ends: 218 [2021-12-21 12:36:21,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 12:36:21,046 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 105 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:36:21,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 404 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 243 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-12-21 12:36:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-21 12:36:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-12-21 12:36:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 121 states have (on average 1.165289256198347) internal successors, (141), 127 states have internal predecessors, (141), 81 states have call successors, (81), 13 states have call predecessors, (81), 13 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-21 12:36:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 302 transitions. [2021-12-21 12:36:21,095 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 302 transitions. Word has length 85 [2021-12-21 12:36:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:36:21,095 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 302 transitions. [2021-12-21 12:36:21,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-21 12:36:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 302 transitions. [2021-12-21 12:36:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 12:36:21,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:36:21,096 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:36:21,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 12:36:21,336 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 [2021-12-21 12:36:21,336 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:36:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:36:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-12-21 12:36:21,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:36:21,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521437487] [2021-12-21 12:36:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:21,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:36:21,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:36:21,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184081330] [2021-12-21 12:36:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:36:21,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:36:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:36:21,352 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) [2021-12-21 12:36:21,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 12:36:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:36:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-21 12:36:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:36:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-21 12:36:22,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:36:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-21 12:36:26,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:36:26,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521437487] [2021-12-21 12:36:26,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:36:26,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184081330] [2021-12-21 12:36:26,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184081330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:36:26,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:36:26,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 33 [2021-12-21 12:36:26,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82666573] [2021-12-21 12:36:26,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:36:26,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 12:36:26,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:36:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 12:36:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 12:36:26,091 INFO L87 Difference]: Start difference. First operand 216 states and 302 transitions. Second operand has 33 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 12 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-21 12:36:36,791 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 [] [2021-12-21 12:36:42,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:36:46,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:36:52,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:36:54,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:36:56,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:36:59,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:37:06,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:37:08,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:37:10,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:37:12,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:37:15,168 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 [] [2021-12-21 12:37:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:37:15,177 INFO L93 Difference]: Finished difference Result 415 states and 576 transitions. [2021-12-21 12:37:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-21 12:37:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 12 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 87 [2021-12-21 12:37:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:37:15,179 INFO L225 Difference]: With dead ends: 415 [2021-12-21 12:37:15,179 INFO L226 Difference]: Without dead ends: 352 [2021-12-21 12:37:15,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3416 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1805, Invalid=8095, Unknown=0, NotChecked=0, Total=9900 [2021-12-21 12:37:15,182 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 241 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 504 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:37:15,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 587 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 1483 Invalid, 9 Unknown, 0 Unchecked, 29.0s Time] [2021-12-21 12:37:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-21 12:37:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 293. [2021-12-21 12:37:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 164 states have (on average 1.1890243902439024) internal successors, (195), 168 states have internal predecessors, (195), 109 states have call successors, (109), 19 states have call predecessors, (109), 19 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-12-21 12:37:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 412 transitions. [2021-12-21 12:37:15,261 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 412 transitions. Word has length 87 [2021-12-21 12:37:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:37:15,262 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 412 transitions. [2021-12-21 12:37:15,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 12 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-21 12:37:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 412 transitions. [2021-12-21 12:37:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 12:37:15,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:15,263 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:15,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 12:37:15,468 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 [2021-12-21 12:37:15,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 967586699, now seen corresponding path program 2 times [2021-12-21 12:37:15,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:37:15,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749645996] [2021-12-21 12:37:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:15,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:37:15,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:37:15,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661622042] [2021-12-21 12:37:15,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:37:15,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:37:15,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:37:15,478 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) [2021-12-21 12:37:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 12:37:15,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:37:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:37:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 12:37:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:37:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 12:37:15,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:37:15,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:37:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749645996] [2021-12-21 12:37:15,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:37:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661622042] [2021-12-21 12:37:15,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661622042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:37:15,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:37:15,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:37:15,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599925181] [2021-12-21 12:37:15,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:37:15,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:37:15,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:37:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:37:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:37:15,630 INFO L87 Difference]: Start difference. First operand 293 states and 412 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-21 12:37:15,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:37:15,728 INFO L93 Difference]: Finished difference Result 439 states and 618 transitions. [2021-12-21 12:37:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:37:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 88 [2021-12-21 12:37:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:37:15,730 INFO L225 Difference]: With dead ends: 439 [2021-12-21 12:37:15,730 INFO L226 Difference]: Without dead ends: 285 [2021-12-21 12:37:15,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:37:15,731 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:37:15,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 103 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:37:15,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-21 12:37:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2021-12-21 12:37:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 101 states have call successors, (101), 18 states have call predecessors, (101), 18 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-21 12:37:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 386 transitions. [2021-12-21 12:37:15,798 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 386 transitions. Word has length 88 [2021-12-21 12:37:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:37:15,798 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 386 transitions. [2021-12-21 12:37:15,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-21 12:37:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 386 transitions. [2021-12-21 12:37:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 12:37:15,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:15,800 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:15,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 12:37:16,019 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 [2021-12-21 12:37:16,019 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2021-12-21 12:37:16,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:37:16,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156697847] [2021-12-21 12:37:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:16,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:37:16,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:37:16,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650429425] [2021-12-21 12:37:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:16,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:37:16,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:37:16,028 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) [2021-12-21 12:37:16,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 12:37:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:37:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:37:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:37:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 12:37:16,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:37:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-21 12:37:16,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:37:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156697847] [2021-12-21 12:37:16,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:37:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650429425] [2021-12-21 12:37:16,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650429425] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:37:16,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:37:16,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-21 12:37:16,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796690231] [2021-12-21 12:37:16,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:37:16,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 12:37:16,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:37:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 12:37:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-21 12:37:16,530 INFO L87 Difference]: Start difference. First operand 277 states and 386 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-21 12:37:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:37:16,886 INFO L93 Difference]: Finished difference Result 382 states and 527 transitions. [2021-12-21 12:37:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 12:37:16,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 90 [2021-12-21 12:37:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:37:16,888 INFO L225 Difference]: With dead ends: 382 [2021-12-21 12:37:16,888 INFO L226 Difference]: Without dead ends: 244 [2021-12-21 12:37:16,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-12-21 12:37:16,889 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 69 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:37:16,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 314 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:37:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-21 12:37:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 238. [2021-12-21 12:37:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 135 states have internal predecessors, (154), 85 states have call successors, (85), 18 states have call predecessors, (85), 18 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-21 12:37:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 323 transitions. [2021-12-21 12:37:16,950 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 323 transitions. Word has length 90 [2021-12-21 12:37:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:37:16,950 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 323 transitions. [2021-12-21 12:37:16,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-21 12:37:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 323 transitions. [2021-12-21 12:37:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 12:37:16,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:37:16,952 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:37:16,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 12:37:17,167 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 [2021-12-21 12:37:17,168 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:37:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:37:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash 453133023, now seen corresponding path program 2 times [2021-12-21 12:37:17,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:37:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140773056] [2021-12-21 12:37:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:37:17,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:37:17,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:37:17,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085197809] [2021-12-21 12:37:17,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:37:17,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:37:17,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:37:17,175 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) [2021-12-21 12:37:17,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 12:37:17,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:37:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:37:17,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 12:37:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:37:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-21 12:37:17,568 INFO L328 TraceCheckSpWp]: Computing backward predicates...