./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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_valuebound10.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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:25:26,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:25:26,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:25:26,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:25:26,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:25:26,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:25:26,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:25:26,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:25:26,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:25:26,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:25:26,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:25:26,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:25:26,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:25:26,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:25:26,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:25:26,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:25:26,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:25:26,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:25:26,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:25:26,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:25:26,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:25:26,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:25:26,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:25:26,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:25:26,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:25:26,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:25:26,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:25:26,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:25:26,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:25:26,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:25:26,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:25:26,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:25:26,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:25:26,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:25:26,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:25:26,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:25:26,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:25:26,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:25:26,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:25:26,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:25:26,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:25:26,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:25:26,665 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:25:26,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:25:26,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:25:26,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:25:26,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:25:26,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:25:26,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:25:26,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:25:26,668 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:25:26,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:25:26,669 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:25:26,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:25:26,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:25:26,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:25:26,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:25:26,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:25:26,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:25:26,670 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:25:26,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:25:26,671 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:25:26,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:25:26,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:25:26,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:25:26,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:25:26,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:25:26,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:25:26,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:25:26,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:25:26,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:25:26,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:25:26,673 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:25:26,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:25:26,673 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:25:26,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:25:26,674 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:25:26,674 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2023-02-18 17:25:26,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:25:26,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:25:26,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:25:26,976 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:25:26,976 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:25:26,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-02-18 17:25:28,201 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:25:28,408 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:25:28,408 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2023-02-18 17:25:28,414 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfc16ab5a/812d9c463fd24081a9b24af261060522/FLAG550180495 [2023-02-18 17:25:28,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfc16ab5a/812d9c463fd24081a9b24af261060522 [2023-02-18 17:25:28,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:25:28,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:25:28,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:25:28,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:25:28,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:25:28,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da90fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28, skipping insertion in model container [2023-02-18 17:25:28,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:25:28,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:25:28,577 WARN L237 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_valuebound10.c[490,503] [2023-02-18 17:25:28,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:25:28,613 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:25:28,624 WARN L237 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_valuebound10.c[490,503] [2023-02-18 17:25:28,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:25:28,646 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:25:28,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28 WrapperNode [2023-02-18 17:25:28,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:25:28,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:25:28,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:25:28,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:25:28,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,674 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-18 17:25:28,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:25:28,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:25:28,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:25:28,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:25:28,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,697 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:25:28,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:25:28,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:25:28,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:25:28,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (1/1) ... [2023-02-18 17:25:28,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:25:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:28,731 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) [2023-02-18 17:25:28,738 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 [2023-02-18 17:25:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:25:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:25:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:25:28,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:25:28,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:25:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:25:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:25:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:25:28,831 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:25:28,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:25:29,004 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:25:29,033 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:25:29,034 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 17:25:29,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:25:29 BoogieIcfgContainer [2023-02-18 17:25:29,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:25:29,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:25:29,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:25:29,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:25:29,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:25:28" (1/3) ... [2023-02-18 17:25:29,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a00a999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:25:29, skipping insertion in model container [2023-02-18 17:25:29,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:25:28" (2/3) ... [2023-02-18 17:25:29,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a00a999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:25:29, skipping insertion in model container [2023-02-18 17:25:29,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:25:29" (3/3) ... [2023-02-18 17:25:29,042 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2023-02-18 17:25:29,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:25:29,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:25:29,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:25:29,143 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d6ab841, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:25:29,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:25:29,148 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) [2023-02-18 17:25:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 17:25:29,155 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:29,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:25:29,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-18 17:25:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:29,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661628288] [2023-02-18 17:25:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:29,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:29,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661628288] [2023-02-18 17:25:29,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:25:29,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321209769] [2023-02-18 17:25:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:29,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:29,297 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) [2023-02-18 17:25:29,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 17:25:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:25:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 17:25:29,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:25:29,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321209769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:25:29,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:25:29,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:25:29,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192068945] [2023-02-18 17:25:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:25:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:25:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:25:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:25:29,472 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-02-18 17:25:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:29,493 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-18 17:25:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:25:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 [2023-02-18 17:25:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:29,505 INFO L225 Difference]: With dead ends: 67 [2023-02-18 17:25:29,506 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 17:25:29,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:25:29,512 INFO L413 NwaCegarLoop]: 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 [2023-02-18 17:25:29,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:25:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 17:25:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 17:25:29,541 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) [2023-02-18 17:25:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-18 17:25:29,544 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-18 17:25:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:29,545 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-18 17:25:29,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-02-18 17:25:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-18 17:25:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 17:25:29,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:29,548 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:25:29,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:29,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 17:25:29,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-18 17:25:29,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:29,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95664853] [2023-02-18 17:25:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:29,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123670698] [2023-02-18 17:25:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:29,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:29,787 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) [2023-02-18 17:25:29,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 17:25:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:25:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:25:29,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:25:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95664853] [2023-02-18 17:25:29,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123670698] [2023-02-18 17:25:29,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123670698] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:25:29,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:25:29,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 17:25:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362435430] [2023-02-18 17:25:29,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:25:29,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:25:29,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:25:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:25:29,954 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) [2023-02-18 17:25:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:30,083 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-18 17:25:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:25:30,084 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 [2023-02-18 17:25:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:30,090 INFO L225 Difference]: With dead ends: 50 [2023-02-18 17:25:30,090 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 17:25:30,092 INFO L412 NwaCegarLoop]: 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 [2023-02-18 17:25:30,093 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:30,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:25:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 17:25:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-18 17:25:30,112 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) [2023-02-18 17:25:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 17:25:30,116 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-18 17:25:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:30,117 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 17:25:30,117 INFO L496 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) [2023-02-18 17:25:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 17:25:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 17:25:30,119 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:30,120 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:30,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 17:25:30,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 17:25:30,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-18 17:25:30,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:30,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044605382] [2023-02-18 17:25:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:30,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:30,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384128827] [2023-02-18 17:25:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:30,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:30,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:30,345 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) [2023-02-18 17:25:30,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 17:25:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:25:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:25:30,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:25:30,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:30,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044605382] [2023-02-18 17:25:30,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384128827] [2023-02-18 17:25:30,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384128827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:25:30,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:25:30,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 17:25:30,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576044946] [2023-02-18 17:25:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:25:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 17:25:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 17:25:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:25:30,479 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-02-18 17:25:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:30,594 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-18 17:25:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 17:25:30,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 33 [2023-02-18 17:25:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:30,596 INFO L225 Difference]: With dead ends: 49 [2023-02-18 17:25:30,596 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 17:25:30,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:25:30,601 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:30,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:25:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 17:25:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-18 17:25:30,621 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) [2023-02-18 17:25:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-18 17:25:30,623 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-18 17:25:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:30,624 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-18 17:25:30,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-02-18 17:25:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-18 17:25:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 17:25:30,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:30,626 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:30,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:30,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:30,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-18 17:25:30,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:30,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803311275] [2023-02-18 17:25:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:30,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:30,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:30,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265899614] [2023-02-18 17:25:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:30,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:30,863 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) [2023-02-18 17:25:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 17:25:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:25:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:25:30,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 17:25:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:31,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803311275] [2023-02-18 17:25:31,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:31,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265899614] [2023-02-18 17:25:31,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265899614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:31,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:31,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 17:25:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46278532] [2023-02-18 17:25:31,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 17:25:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 17:25:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:25:31,063 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) [2023-02-18 17:25:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:31,247 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-18 17:25:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 17:25:31,248 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 [2023-02-18 17:25:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:31,249 INFO L225 Difference]: With dead ends: 99 [2023-02-18 17:25:31,249 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 17:25:31,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:25:31,251 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:31,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:25:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 17:25:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-18 17:25:31,262 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) [2023-02-18 17:25:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-18 17:25:31,264 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-18 17:25:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:31,264 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-18 17:25:31,264 INFO L496 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) [2023-02-18 17:25:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-18 17:25:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 17:25:31,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:31,265 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:31,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:31,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-18 17:25:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:31,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781617607] [2023-02-18 17:25:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:31,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:31,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793915048] [2023-02-18 17:25:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:31,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:31,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:31,499 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) [2023-02-18 17:25:31,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 17:25:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:25:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:25:31,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781617607] [2023-02-18 17:25:31,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793915048] [2023-02-18 17:25:31,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793915048] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:25:31,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:25:31,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 17:25:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303638846] [2023-02-18 17:25:31,649 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:25:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:25:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:25:31,650 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), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 17:25:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:31,734 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-18 17:25:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:25:31,737 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), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-18 17:25:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:31,738 INFO L225 Difference]: With dead ends: 75 [2023-02-18 17:25:31,738 INFO L226 Difference]: Without dead ends: 73 [2023-02-18 17:25:31,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:25:31,739 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:31,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:25:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-18 17:25:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-18 17:25:31,748 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) [2023-02-18 17:25:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-18 17:25:31,750 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-18 17:25:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:31,750 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-18 17:25:31,750 INFO L496 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), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 17:25:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-18 17:25:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 17:25:31,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:31,752 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:31,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:31,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-18 17:25:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:31,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786617814] [2023-02-18 17:25:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:31,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976367089] [2023-02-18 17:25:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:31,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:31,986 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) [2023-02-18 17:25:31,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 17:25:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:32,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 17:25:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:25:32,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:25:32,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786617814] [2023-02-18 17:25:32,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976367089] [2023-02-18 17:25:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976367089] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:32,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:32,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-18 17:25:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144420747] [2023-02-18 17:25:32,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 17:25:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 17:25:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-18 17:25:32,230 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:25:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:32,674 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-02-18 17:25:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 17:25:32,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-02-18 17:25:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:32,676 INFO L225 Difference]: With dead ends: 114 [2023-02-18 17:25:32,676 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 17:25:32,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-02-18 17:25:32,678 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:32,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 312 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:25:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 17:25:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2023-02-18 17:25:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 17:25:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-18 17:25:32,705 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-18 17:25:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:32,705 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-18 17:25:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:25:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-18 17:25:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:25:32,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:32,707 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:32,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:32,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-18 17:25:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105864596] [2023-02-18 17:25:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:32,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096087839] [2023-02-18 17:25:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:32,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:32,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:32,927 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) [2023-02-18 17:25:32,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 17:25:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:32,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 17:25:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:25:33,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:35,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105864596] [2023-02-18 17:25:35,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096087839] [2023-02-18 17:25:35,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096087839] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:25:35,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:25:35,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-18 17:25:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384287362] [2023-02-18 17:25:35,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:35,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:25:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:25:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-02-18 17:25:35,180 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:25:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:35,516 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-18 17:25:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 17:25:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-02-18 17:25:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:35,518 INFO L225 Difference]: With dead ends: 114 [2023-02-18 17:25:35,518 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 17:25:35,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-02-18 17:25:35,519 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:35,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 156 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:25:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 17:25:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-18 17:25:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 17:25:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2023-02-18 17:25:35,547 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 43 [2023-02-18 17:25:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:35,549 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2023-02-18 17:25:35,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:25:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2023-02-18 17:25:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:25:35,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:35,555 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:35,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 17:25:35,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:35,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-18 17:25:35,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:35,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853518782] [2023-02-18 17:25:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:35,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815505591] [2023-02-18 17:25:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:35,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:35,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:35,786 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) [2023-02-18 17:25:35,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 17:25:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 17:25:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 17:25:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:25:36,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:36,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853518782] [2023-02-18 17:25:36,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:36,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815505591] [2023-02-18 17:25:36,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815505591] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:36,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:36,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-02-18 17:25:36,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974163290] [2023-02-18 17:25:36,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 17:25:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 17:25:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-02-18 17:25:36,137 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 17:25:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:40,060 INFO L93 Difference]: Finished difference Result 182 states and 255 transitions. [2023-02-18 17:25:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 17:25:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-02-18 17:25:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:40,065 INFO L225 Difference]: With dead ends: 182 [2023-02-18 17:25:40,065 INFO L226 Difference]: Without dead ends: 180 [2023-02-18 17:25:40,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 17:25:40,067 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 190 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:40,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 186 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-18 17:25:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-18 17:25:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2023-02-18 17:25:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-02-18 17:25:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 191 transitions. [2023-02-18 17:25:40,124 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 191 transitions. Word has length 43 [2023-02-18 17:25:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 191 transitions. [2023-02-18 17:25:40,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 17:25:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 191 transitions. [2023-02-18 17:25:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 17:25:40,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:40,127 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:40,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 17:25:40,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2023-02-18 17:25:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:40,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005395775] [2023-02-18 17:25:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:40,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:40,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623802625] [2023-02-18 17:25:40,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:25:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:40,361 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) [2023-02-18 17:25:40,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 17:25:40,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:25:40,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:25:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:25:40,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 17:25:40,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:25:40,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005395775] [2023-02-18 17:25:40,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623802625] [2023-02-18 17:25:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623802625] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:25:40,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:25:40,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:25:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472096220] [2023-02-18 17:25:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:25:40,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:25:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:25:40,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:25:40,452 INFO L87 Difference]: Start difference. First operand 141 states and 191 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) [2023-02-18 17:25:40,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:40,556 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2023-02-18 17:25:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:25:40,557 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 [2023-02-18 17:25:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:40,558 INFO L225 Difference]: With dead ends: 195 [2023-02-18 17:25:40,558 INFO L226 Difference]: Without dead ends: 132 [2023-02-18 17:25:40,562 INFO L412 NwaCegarLoop]: 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 [2023-02-18 17:25:40,563 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:40,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:25:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-18 17:25:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2023-02-18 17:25:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 17:25:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2023-02-18 17:25:40,590 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 43 [2023-02-18 17:25:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:40,591 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2023-02-18 17:25:40,591 INFO L496 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) [2023-02-18 17:25:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2023-02-18 17:25:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 17:25:40,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:40,593 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:40,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:40,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:40,799 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-18 17:25:40,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:40,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860447059] [2023-02-18 17:25:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:40,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:40,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707109740] [2023-02-18 17:25:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:40,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:40,810 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) [2023-02-18 17:25:40,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 17:25:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 17:25:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 17:25:40,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 17:25:40,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860447059] [2023-02-18 17:25:40,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707109740] [2023-02-18 17:25:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707109740] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:25:40,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:25:40,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-18 17:25:40,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453025312] [2023-02-18 17:25:40,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:25:40,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:25:40,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:25:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:25:40,917 INFO L87 Difference]: Start difference. First operand 97 states and 124 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) [2023-02-18 17:25:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:40,966 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2023-02-18 17:25:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:25:40,966 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 [2023-02-18 17:25:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:40,967 INFO L225 Difference]: With dead ends: 103 [2023-02-18 17:25:40,967 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 17:25:40,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:25:40,968 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:40,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:25:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 17:25:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-18 17:25:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 17:25:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2023-02-18 17:25:40,987 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 48 [2023-02-18 17:25:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:40,988 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2023-02-18 17:25:40,988 INFO L496 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) [2023-02-18 17:25:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2023-02-18 17:25:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 17:25:40,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:40,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-02-18 17:25:40,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:41,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 17:25:41,194 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash 145642443, now seen corresponding path program 1 times [2023-02-18 17:25:41,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:41,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969552748] [2023-02-18 17:25:41,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:41,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:41,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211739902] [2023-02-18 17:25:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:41,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:41,204 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) [2023-02-18 17:25:41,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 17:25:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 17:25:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 17:25:41,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:43,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969552748] [2023-02-18 17:25:43,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:43,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211739902] [2023-02-18 17:25:43,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211739902] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:25:43,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:25:43,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 17:25:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937239572] [2023-02-18 17:25:43,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:25:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:25:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2023-02-18 17:25:43,632 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 17:25:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:44,067 INFO L93 Difference]: Finished difference Result 150 states and 200 transitions. [2023-02-18 17:25:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 17:25:44,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2023-02-18 17:25:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:44,071 INFO L225 Difference]: With dead ends: 150 [2023-02-18 17:25:44,071 INFO L226 Difference]: Without dead ends: 148 [2023-02-18 17:25:44,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2023-02-18 17:25:44,072 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:44,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:25:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-18 17:25:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2023-02-18 17:25:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 75 states have internal predecessors, (84), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-18 17:25:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2023-02-18 17:25:44,097 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 48 [2023-02-18 17:25:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:44,098 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2023-02-18 17:25:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 17:25:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2023-02-18 17:25:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 17:25:44,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:44,099 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:44,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 17:25:44,299 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-18 17:25:44,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002619491] [2023-02-18 17:25:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:44,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:44,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617905191] [2023-02-18 17:25:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:44,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:44,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:44,312 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) [2023-02-18 17:25:44,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 17:25:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:44,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 17:25:44,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 17:25:44,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-18 17:25:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002619491] [2023-02-18 17:25:45,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617905191] [2023-02-18 17:25:45,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617905191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:45,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:45,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-18 17:25:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492350189] [2023-02-18 17:25:45,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:45,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 17:25:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 17:25:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-18 17:25:45,261 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:25:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:52,581 INFO L93 Difference]: Finished difference Result 318 states and 438 transitions. [2023-02-18 17:25:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 17:25:52,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 60 [2023-02-18 17:25:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:52,583 INFO L225 Difference]: With dead ends: 318 [2023-02-18 17:25:52,583 INFO L226 Difference]: Without dead ends: 246 [2023-02-18 17:25:52,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 17:25:52,584 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:52,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 262 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-02-18 17:25:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-18 17:25:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 197. [2023-02-18 17:25:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 51 states have call successors, (51), 13 states have call predecessors, (51), 13 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 17:25:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 257 transitions. [2023-02-18 17:25:52,675 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 257 transitions. Word has length 60 [2023-02-18 17:25:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:52,676 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 257 transitions. [2023-02-18 17:25:52,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:25:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 257 transitions. [2023-02-18 17:25:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 17:25:52,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:52,677 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:25:52,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 17:25:52,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 17:25:52,879 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2023-02-18 17:25:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:25:52,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527783960] [2023-02-18 17:25:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:52,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:25:52,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:25:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316861168] [2023-02-18 17:25:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:52,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:25:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:25:52,888 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) [2023-02-18 17:25:52,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 17:25:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 17:25:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 17:25:53,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-18 17:25:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:25:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527783960] [2023-02-18 17:25:53,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:25:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316861168] [2023-02-18 17:25:53,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316861168] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:53,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:53,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-18 17:25:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101032349] [2023-02-18 17:25:53,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:25:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:25:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:25:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-18 17:25:53,561 INFO L87 Difference]: Start difference. First operand 197 states and 257 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:26:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:08,264 INFO L93 Difference]: Finished difference Result 310 states and 427 transitions. [2023-02-18 17:26:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 17:26:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2023-02-18 17:26:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:08,267 INFO L225 Difference]: With dead ends: 310 [2023-02-18 17:26:08,267 INFO L226 Difference]: Without dead ends: 308 [2023-02-18 17:26:08,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 17:26:08,269 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 153 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:08,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 308 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-02-18 17:26:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-02-18 17:26:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 205. [2023-02-18 17:26:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 138 states have (on average 1.173913043478261) internal successors, (162), 140 states have internal predecessors, (162), 51 states have call successors, (51), 15 states have call predecessors, (51), 15 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-02-18 17:26:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2023-02-18 17:26:08,349 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 68 [2023-02-18 17:26:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:08,350 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2023-02-18 17:26:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 17:26:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2023-02-18 17:26:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 17:26:08,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:08,351 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:26:08,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:08,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 17:26:08,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2023-02-18 17:26:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:08,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542510446] [2023-02-18 17:26:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:08,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:08,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:08,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353229737] [2023-02-18 17:26:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:26:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:08,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:08,572 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) [2023-02-18 17:26:08,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 17:26:08,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:26:08,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:26:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 17:26:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:26:08,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:26:08,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542510446] [2023-02-18 17:26:08,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353229737] [2023-02-18 17:26:08,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353229737] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:26:08,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:26:08,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:26:08,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726936452] [2023-02-18 17:26:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:26:08,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:26:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:26:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:26:08,638 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 17:26:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:08,748 INFO L93 Difference]: Finished difference Result 358 states and 472 transitions. [2023-02-18 17:26:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:26:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2023-02-18 17:26:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:08,754 INFO L225 Difference]: With dead ends: 358 [2023-02-18 17:26:08,754 INFO L226 Difference]: Without dead ends: 244 [2023-02-18 17:26:08,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 17:26:08,756 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:08,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:26:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-18 17:26:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 235. [2023-02-18 17:26:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 154 states have internal predecessors, (177), 67 states have call successors, (67), 15 states have call predecessors, (67), 15 states have return successors, (66), 65 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-18 17:26:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 310 transitions. [2023-02-18 17:26:08,862 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 310 transitions. Word has length 73 [2023-02-18 17:26:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:08,862 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 310 transitions. [2023-02-18 17:26:08,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 17:26:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 310 transitions. [2023-02-18 17:26:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 17:26:08,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:08,864 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:26:08,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:09,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:09,069 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1419603609, now seen corresponding path program 3 times [2023-02-18 17:26:09,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:09,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327800950] [2023-02-18 17:26:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:09,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:09,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72180013] [2023-02-18 17:26:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:26:09,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:09,078 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) [2023-02-18 17:26:09,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 17:26:09,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 17:26:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:26:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 17:26:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 17:26:09,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:26:09,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327800950] [2023-02-18 17:26:09,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:09,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72180013] [2023-02-18 17:26:09,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72180013] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:26:09,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:26:09,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 17:26:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278229827] [2023-02-18 17:26:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:26:09,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:26:09,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:26:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 17:26:09,134 INFO L87 Difference]: Start difference. First operand 235 states and 310 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 17:26:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:09,325 INFO L93 Difference]: Finished difference Result 266 states and 358 transitions. [2023-02-18 17:26:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:26:09,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2023-02-18 17:26:09,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:09,327 INFO L225 Difference]: With dead ends: 266 [2023-02-18 17:26:09,328 INFO L226 Difference]: Without dead ends: 264 [2023-02-18 17:26:09,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:26:09,330 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:09,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:26:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-18 17:26:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2023-02-18 17:26:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1790123456790123) internal successors, (191), 163 states have internal predecessors, (191), 81 states have call successors, (81), 16 states have call predecessors, (81), 16 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-02-18 17:26:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 352 transitions. [2023-02-18 17:26:09,456 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 352 transitions. Word has length 73 [2023-02-18 17:26:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:09,457 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 352 transitions. [2023-02-18 17:26:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 17:26:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 352 transitions. [2023-02-18 17:26:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-18 17:26:09,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:09,458 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:26:09,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 17:26:09,663 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 4 times [2023-02-18 17:26:09,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:09,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897618766] [2023-02-18 17:26:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:09,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:09,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012519087] [2023-02-18 17:26:09,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:26:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:09,673 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) [2023-02-18 17:26:09,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 17:26:09,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:26:09,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:26:09,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-18 17:26:09,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 17:26:09,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 17:26:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897618766] [2023-02-18 17:26:10,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012519087] [2023-02-18 17:26:10,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012519087] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:26:10,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:26:10,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2023-02-18 17:26:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366171980] [2023-02-18 17:26:10,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 17:26:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 17:26:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-02-18 17:26:10,557 INFO L87 Difference]: Start difference. First operand 260 states and 352 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 17:26:17,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:26:19,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:26:23,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:26:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:29,339 INFO L93 Difference]: Finished difference Result 399 states and 546 transitions. [2023-02-18 17:26:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 17:26:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2023-02-18 17:26:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:29,341 INFO L225 Difference]: With dead ends: 399 [2023-02-18 17:26:29,341 INFO L226 Difference]: Without dead ends: 397 [2023-02-18 17:26:29,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 17:26:29,343 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 240 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:29,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 392 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1213 Invalid, 1 Unknown, 0 Unchecked, 16.1s Time] [2023-02-18 17:26:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-02-18 17:26:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2023-02-18 17:26:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 210 states have (on average 1.1857142857142857) internal successors, (249), 211 states have internal predecessors, (249), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-18 17:26:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 466 transitions. [2023-02-18 17:26:29,524 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 466 transitions. Word has length 73 [2023-02-18 17:26:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:29,524 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 466 transitions. [2023-02-18 17:26:29,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 17:26:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 466 transitions. [2023-02-18 17:26:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 17:26:29,525 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:29,525 INFO L195 NwaCegarLoop]: 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] [2023-02-18 17:26:29,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 17:26:29,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-18 17:26:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:26:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486922164] [2023-02-18 17:26:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:26:29,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:26:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687530049] [2023-02-18 17:26:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:26:29,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:26:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:26:29,758 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) [2023-02-18 17:26:29,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 17:26:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:26:29,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 17:26:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-18 17:26:30,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-18 17:26:33,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:26:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486922164] [2023-02-18 17:26:33,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:26:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687530049] [2023-02-18 17:26:33,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687530049] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:26:33,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:26:33,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 17:26:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786395634] [2023-02-18 17:26:33,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 17:26:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:26:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 17:26:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:26:33,346 INFO L87 Difference]: Start difference. First operand 340 states and 466 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-18 17:26:34,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:26:43,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:27:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:00,268 INFO L93 Difference]: Finished difference Result 546 states and 767 transitions. [2023-02-18 17:27:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 17:27:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 87 [2023-02-18 17:27:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:00,272 INFO L225 Difference]: With dead ends: 546 [2023-02-18 17:27:00,272 INFO L226 Difference]: Without dead ends: 538 [2023-02-18 17:27:00,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2264 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1455, Invalid=6555, Unknown=0, NotChecked=0, Total=8010 [2023-02-18 17:27:00,274 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 345 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 756 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:00,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 432 Invalid, 3381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2624 Invalid, 1 Unknown, 0 Unchecked, 20.0s Time] [2023-02-18 17:27:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-02-18 17:27:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 497. [2023-02-18 17:27:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 307 states have (on average 1.205211726384365) internal successors, (370), 308 states have internal predecessors, (370), 165 states have call successors, (165), 24 states have call predecessors, (165), 24 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-02-18 17:27:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 699 transitions. [2023-02-18 17:27:00,708 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 699 transitions. Word has length 87 [2023-02-18 17:27:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:00,709 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 699 transitions. [2023-02-18 17:27:00,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-18 17:27:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 699 transitions. [2023-02-18 17:27:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-18 17:27:00,711 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:00,711 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:27:00,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 17:27:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 17:27:00,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2023-02-18 17:27:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:00,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238270105] [2023-02-18 17:27:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:00,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:00,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592616160] [2023-02-18 17:27:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:27:00,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:00,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:00,938 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) [2023-02-18 17:27:00,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 17:27:01,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:27:01,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 17:27:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-18 17:27:01,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-18 17:27:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238270105] [2023-02-18 17:27:01,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592616160] [2023-02-18 17:27:01,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592616160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:01,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:01,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-18 17:27:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243770308] [2023-02-18 17:27:01,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:01,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:27:01,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:27:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:27:01,087 INFO L87 Difference]: Start difference. First operand 497 states and 699 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-18 17:27:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:01,972 INFO L93 Difference]: Finished difference Result 612 states and 863 transitions. [2023-02-18 17:27:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 17:27:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2023-02-18 17:27:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:01,976 INFO L225 Difference]: With dead ends: 612 [2023-02-18 17:27:01,976 INFO L226 Difference]: Without dead ends: 605 [2023-02-18 17:27:01,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2023-02-18 17:27:01,977 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 77 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:01,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 394 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 17:27:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-02-18 17:27:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 460. [2023-02-18 17:27:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 278 states have (on average 1.2122302158273381) internal successors, (337), 279 states have internal predecessors, (337), 157 states have call successors, (157), 24 states have call predecessors, (157), 24 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-18 17:27:02,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 650 transitions. [2023-02-18 17:27:02,386 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 650 transitions. Word has length 95 [2023-02-18 17:27:02,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:02,386 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 650 transitions. [2023-02-18 17:27:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-18 17:27:02,387 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 650 transitions. [2023-02-18 17:27:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-18 17:27:02,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:02,389 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2023-02-18 17:27:02,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 17:27:02,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 17:27:02,595 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-18 17:27:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:02,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896206266] [2023-02-18 17:27:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:02,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:02,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:02,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935406720] [2023-02-18 17:27:02,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:27:02,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:02,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:02,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:27:02,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 17:27:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:27:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 17:27:02,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-18 17:27:02,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-18 17:27:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896206266] [2023-02-18 17:27:04,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935406720] [2023-02-18 17:27:04,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935406720] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:04,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:04,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-18 17:27:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524674284] [2023-02-18 17:27:04,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:04,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 17:27:04,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:04,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 17:27:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-02-18 17:27:04,942 INFO L87 Difference]: Start difference. First operand 460 states and 650 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-18 17:27:27,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:27:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:43,066 INFO L93 Difference]: Finished difference Result 886 states and 1272 transitions. [2023-02-18 17:27:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 17:27:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 107 [2023-02-18 17:27:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:43,070 INFO L225 Difference]: With dead ends: 886 [2023-02-18 17:27:43,070 INFO L226 Difference]: Without dead ends: 698 [2023-02-18 17:27:43,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1595, Invalid=7147, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 17:27:43,073 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 250 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:43,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 348 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 26.0s Time] [2023-02-18 17:27:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2023-02-18 17:27:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 626. [2023-02-18 17:27:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 372 states have (on average 1.217741935483871) internal successors, (453), 373 states have internal predecessors, (453), 225 states have call successors, (225), 28 states have call predecessors, (225), 28 states have return successors, (224), 224 states have call predecessors, (224), 224 states have call successors, (224) [2023-02-18 17:27:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 902 transitions. [2023-02-18 17:27:43,725 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 902 transitions. Word has length 107 [2023-02-18 17:27:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:43,725 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 902 transitions. [2023-02-18 17:27:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-18 17:27:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 902 transitions. [2023-02-18 17:27:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 17:27:43,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:43,728 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:27:43,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 17:27:43,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:43,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2023-02-18 17:27:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477196184] [2023-02-18 17:27:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:43,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:43,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174250461] [2023-02-18 17:27:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:43,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:43,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:43,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:27:43,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 17:27:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:27:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 17:27:44,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-02-18 17:27:44,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-02-18 17:27:44,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477196184] [2023-02-18 17:27:44,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174250461] [2023-02-18 17:27:44,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174250461] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:27:44,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:27:44,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-18 17:27:44,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619787872] [2023-02-18 17:27:44,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 17:27:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 17:27:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-02-18 17:27:44,456 INFO L87 Difference]: Start difference. First operand 626 states and 902 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-18 17:27:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:48,000 INFO L93 Difference]: Finished difference Result 1478 states and 2234 transitions. [2023-02-18 17:27:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 17:27:48,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2023-02-18 17:27:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:48,008 INFO L225 Difference]: With dead ends: 1478 [2023-02-18 17:27:48,008 INFO L226 Difference]: Without dead ends: 1169 [2023-02-18 17:27:48,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2023-02-18 17:27:48,010 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 158 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:48,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 574 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 17:27:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2023-02-18 17:27:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1087. [2023-02-18 17:27:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 560 states have (on average 1.2732142857142856) internal successors, (713), 565 states have internal predecessors, (713), 492 states have call successors, (492), 34 states have call predecessors, (492), 34 states have return successors, (491), 487 states have call predecessors, (491), 491 states have call successors, (491) [2023-02-18 17:27:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1696 transitions. [2023-02-18 17:27:49,460 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1696 transitions. Word has length 120 [2023-02-18 17:27:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:49,460 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1696 transitions. [2023-02-18 17:27:49,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-18 17:27:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1696 transitions. [2023-02-18 17:27:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-18 17:27:49,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:49,463 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-02-18 17:27:49,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 17:27:49,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:49,668 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2023-02-18 17:27:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874823442] [2023-02-18 17:27:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:49,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:49,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996189089] [2023-02-18 17:27:49,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:27:49,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:49,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:27:49,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 17:27:49,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:27:49,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 17:27:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 55 proven. 74 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-02-18 17:27:50,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874823442] [2023-02-18 17:27:53,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996189089] [2023-02-18 17:27:53,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996189089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:27:53,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:27:53,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 17:27:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757059174] [2023-02-18 17:27:53,472 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 17:27:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 17:27:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 17:27:53,474 INFO L87 Difference]: Start difference. First operand 1087 states and 1696 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 22 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-18 17:27:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:56,644 INFO L93 Difference]: Finished difference Result 1236 states and 1913 transitions. [2023-02-18 17:27:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 17:27:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 22 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) Word has length 120 [2023-02-18 17:27:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:56,650 INFO L225 Difference]: With dead ends: 1236 [2023-02-18 17:27:56,650 INFO L226 Difference]: Without dead ends: 1234 [2023-02-18 17:27:56,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 17:27:56,652 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 92 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:56,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 420 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1719 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 17:27:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2023-02-18 17:27:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1207. [2023-02-18 17:27:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 619 states have (on average 1.2730210016155088) internal successors, (788), 625 states have internal predecessors, (788), 547 states have call successors, (547), 40 states have call predecessors, (547), 40 states have return successors, (546), 541 states have call predecessors, (546), 546 states have call successors, (546) [2023-02-18 17:27:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1881 transitions. [2023-02-18 17:27:58,195 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1881 transitions. Word has length 120 [2023-02-18 17:27:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:58,195 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1881 transitions. [2023-02-18 17:27:58,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 22 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-18 17:27:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1881 transitions. [2023-02-18 17:27:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 17:27:58,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:58,198 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:27:58,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 17:27:58,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:58,403 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2023-02-18 17:27:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:27:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561704088] [2023-02-18 17:27:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:27:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:27:58,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:27:58,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246306656] [2023-02-18 17:27:58,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:27:58,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:27:58,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:27:58,419 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:27:58,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 17:27:58,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 17:27:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-18 17:27:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 70 proven. 74 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-02-18 17:27:59,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:27:59,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:27:59,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561704088] [2023-02-18 17:27:59,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:27:59,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246306656] [2023-02-18 17:27:59,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246306656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:27:59,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:27:59,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-02-18 17:27:59,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480311770] [2023-02-18 17:27:59,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:27:59,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 17:27:59,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:27:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 17:27:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2023-02-18 17:27:59,714 INFO L87 Difference]: Start difference. First operand 1207 states and 1881 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-18 17:28:02,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:28:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:28:05,199 INFO L93 Difference]: Finished difference Result 1463 states and 2273 transitions. [2023-02-18 17:28:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 17:28:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 125 [2023-02-18 17:28:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:28:05,205 INFO L225 Difference]: With dead ends: 1463 [2023-02-18 17:28:05,205 INFO L226 Difference]: Without dead ends: 1461 [2023-02-18 17:28:05,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=1746, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 17:28:05,207 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 114 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:28:05,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 505 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2198 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-18 17:28:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2023-02-18 17:28:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1330. [2023-02-18 17:28:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 681 states have (on average 1.2716593245227605) internal successors, (866), 688 states have internal predecessors, (866), 602 states have call successors, (602), 46 states have call predecessors, (602), 46 states have return successors, (601), 595 states have call predecessors, (601), 601 states have call successors, (601) [2023-02-18 17:28:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 2069 transitions. [2023-02-18 17:28:06,863 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 2069 transitions. Word has length 125 [2023-02-18 17:28:06,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:28:06,863 INFO L495 AbstractCegarLoop]: Abstraction has 1330 states and 2069 transitions. [2023-02-18 17:28:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-18 17:28:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 2069 transitions. [2023-02-18 17:28:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 17:28:06,866 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:28:06,866 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:28:06,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 17:28:07,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:07,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:28:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:28:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1192369783, now seen corresponding path program 3 times [2023-02-18 17:28:07,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:28:07,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439973767] [2023-02-18 17:28:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:28:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:28:07,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:28:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146152600] [2023-02-18 17:28:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:28:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:28:07,086 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:28:07,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 17:28:07,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 17:28:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:28:07,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-18 17:28:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:28:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 73 proven. 51 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-02-18 17:28:07,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:28:08,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:28:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439973767] [2023-02-18 17:28:08,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:28:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146152600] [2023-02-18 17:28:08,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146152600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:28:08,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:28:08,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 17:28:08,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634738613] [2023-02-18 17:28:08,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:28:08,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 17:28:08,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:28:08,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 17:28:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-02-18 17:28:08,059 INFO L87 Difference]: Start difference. First operand 1330 states and 2069 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 17:28:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:28:10,932 INFO L93 Difference]: Finished difference Result 1468 states and 2275 transitions. [2023-02-18 17:28:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 17:28:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 134 [2023-02-18 17:28:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:28:10,939 INFO L225 Difference]: With dead ends: 1468 [2023-02-18 17:28:10,939 INFO L226 Difference]: Without dead ends: 1461 [2023-02-18 17:28:10,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 17:28:10,941 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 63 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:28:10,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 302 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 17:28:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2023-02-18 17:28:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1441. [2023-02-18 17:28:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 734 states have (on average 1.2738419618528611) internal successors, (935), 742 states have internal predecessors, (935), 656 states have call successors, (656), 50 states have call predecessors, (656), 50 states have return successors, (655), 648 states have call predecessors, (655), 655 states have call successors, (655) [2023-02-18 17:28:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2246 transitions. [2023-02-18 17:28:12,768 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2246 transitions. Word has length 134 [2023-02-18 17:28:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:28:12,768 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 2246 transitions. [2023-02-18 17:28:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 17:28:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2246 transitions. [2023-02-18 17:28:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 17:28:12,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:28:12,771 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:28:12,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 17:28:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:12,976 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:28:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:28:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1841111375, now seen corresponding path program 4 times [2023-02-18 17:28:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:28:12,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492895683] [2023-02-18 17:28:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:28:12,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:28:12,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:28:12,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3464387] [2023-02-18 17:28:12,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:28:12,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:28:12,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:28:12,990 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:28:12,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 17:28:13,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:28:13,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:28:13,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 17:28:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:28:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 76 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-18 17:28:13,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:28:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-02-18 17:28:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:28:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492895683] [2023-02-18 17:28:19,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:28:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3464387] [2023-02-18 17:28:19,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3464387] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:28:19,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:28:19,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2023-02-18 17:28:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924051108] [2023-02-18 17:28:19,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:28:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 17:28:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:28:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 17:28:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 17:28:19,769 INFO L87 Difference]: Start difference. First operand 1441 states and 2246 transitions. Second operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2023-02-18 17:28:33,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:35,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:37,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:39,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:48,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:52,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:54,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:57,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:28:59,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:01,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:07,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:16,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:20,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:22,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:26,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:31,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:35,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:39,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:41,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:43,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:29:59,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:01,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:09,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:12,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:15,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:18,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:25,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:28,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:30,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:32,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:38,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:51,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:30:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:30:54,426 INFO L93 Difference]: Finished difference Result 2038 states and 3176 transitions. [2023-02-18 17:30:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-02-18 17:30:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 134 [2023-02-18 17:30:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:30:54,434 INFO L225 Difference]: With dead ends: 2038 [2023-02-18 17:30:54,434 INFO L226 Difference]: Without dead ends: 2033 [2023-02-18 17:30:54,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6711 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=3802, Invalid=15938, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 17:30:54,440 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 411 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 831 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 5109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:30:54,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 618 Invalid, 5109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 4255 Invalid, 23 Unknown, 0 Unchecked, 116.7s Time] [2023-02-18 17:30:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2023-02-18 17:30:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1622. [2023-02-18 17:30:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 836 states have (on average 1.2799043062200957) internal successors, (1070), 845 states have internal predecessors, (1070), 730 states have call successors, (730), 55 states have call predecessors, (730), 55 states have return successors, (729), 721 states have call predecessors, (729), 729 states have call successors, (729) [2023-02-18 17:30:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2529 transitions. [2023-02-18 17:30:57,552 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2529 transitions. Word has length 134 [2023-02-18 17:30:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:30:57,552 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2529 transitions. [2023-02-18 17:30:57,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2023-02-18 17:30:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2529 transitions. [2023-02-18 17:30:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 17:30:57,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:30:57,556 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:30:57,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 17:30:57,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:57,761 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:30:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:30:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash -969870237, now seen corresponding path program 4 times [2023-02-18 17:30:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:30:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912436523] [2023-02-18 17:30:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:30:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:30:57,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:30:57,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830446049] [2023-02-18 17:30:57,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:30:57,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:30:57,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:30:57,775 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:30:57,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 17:30:57,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:30:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:30:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 17:30:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:30:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 116 proven. 65 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2023-02-18 17:30:58,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:58,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:30:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912436523] [2023-02-18 17:30:58,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:30:58,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830446049] [2023-02-18 17:30:58,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830446049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:30:58,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:30:58,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 17:30:58,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766941859] [2023-02-18 17:30:58,603 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:58,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 17:30:58,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:30:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 17:30:58,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-02-18 17:30:58,604 INFO L87 Difference]: Start difference. First operand 1622 states and 2529 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 17:31:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:31:03,571 INFO L93 Difference]: Finished difference Result 1988 states and 3109 transitions. [2023-02-18 17:31:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 17:31:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 142 [2023-02-18 17:31:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:31:03,578 INFO L225 Difference]: With dead ends: 1988 [2023-02-18 17:31:03,578 INFO L226 Difference]: Without dead ends: 1844 [2023-02-18 17:31:03,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 17:31:03,580 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 125 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:31:03,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 553 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 17:31:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2023-02-18 17:31:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1668. [2023-02-18 17:31:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 866 states have (on average 1.2759815242494226) internal successors, (1105), 875 states have internal predecessors, (1105), 746 states have call successors, (746), 55 states have call predecessors, (746), 55 states have return successors, (745), 737 states have call predecessors, (745), 745 states have call successors, (745) [2023-02-18 17:31:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2596 transitions. [2023-02-18 17:31:06,943 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2596 transitions. Word has length 142 [2023-02-18 17:31:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:31:06,944 INFO L495 AbstractCegarLoop]: Abstraction has 1668 states and 2596 transitions. [2023-02-18 17:31:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 17:31:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2596 transitions. [2023-02-18 17:31:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 17:31:06,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:31:06,947 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:31:06,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-18 17:31:07,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 17:31:07,161 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:31:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:31:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1917326542, now seen corresponding path program 5 times [2023-02-18 17:31:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:31:07,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287729378] [2023-02-18 17:31:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:31:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:31:07,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:31:07,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607491086] [2023-02-18 17:31:07,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:31:07,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:31:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:31:07,181 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:31:07,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 17:31:07,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:31:07,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:31:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-18 17:31:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:31:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 45 proven. 164 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-02-18 17:31:08,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:31:12,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:31:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287729378] [2023-02-18 17:31:12,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:31:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607491086] [2023-02-18 17:31:12,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607491086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:31:12,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:31:12,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 17:31:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843663240] [2023-02-18 17:31:12,790 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:31:12,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 17:31:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:31:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 17:31:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 17:31:12,792 INFO L87 Difference]: Start difference. First operand 1668 states and 2596 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 17:31:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:31:18,293 INFO L93 Difference]: Finished difference Result 1818 states and 2816 transitions. [2023-02-18 17:31:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 17:31:18,293 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 142 [2023-02-18 17:31:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:31:18,299 INFO L225 Difference]: With dead ends: 1818 [2023-02-18 17:31:18,299 INFO L226 Difference]: Without dead ends: 1815 [2023-02-18 17:31:18,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=429, Invalid=2763, Unknown=0, NotChecked=0, Total=3192 [2023-02-18 17:31:18,300 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 112 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:31:18,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 432 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 17:31:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2023-02-18 17:31:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1681. [2023-02-18 17:31:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 876 states have (on average 1.2728310502283104) internal successors, (1115), 884 states have internal predecessors, (1115), 747 states have call successors, (747), 57 states have call predecessors, (747), 57 states have return successors, (746), 739 states have call predecessors, (746), 746 states have call successors, (746) [2023-02-18 17:31:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 2608 transitions. [2023-02-18 17:31:21,492 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 2608 transitions. Word has length 142 [2023-02-18 17:31:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:31:21,492 INFO L495 AbstractCegarLoop]: Abstraction has 1681 states and 2608 transitions. [2023-02-18 17:31:21,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 17:31:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 2608 transitions. [2023-02-18 17:31:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-18 17:31:21,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:31:21,496 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:31:21,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 17:31:21,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 17:31:21,701 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:31:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:31:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1075315432, now seen corresponding path program 6 times [2023-02-18 17:31:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:31:21,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744039604] [2023-02-18 17:31:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:31:21,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:31:21,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:31:21,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022763611] [2023-02-18 17:31:21,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:31:21,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:31:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:31:21,717 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:31:21,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 17:31:21,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 17:31:21,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:31:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-18 17:31:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:31:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 69 proven. 138 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-02-18 17:31:22,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:31:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 120 proven. 69 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-02-18 17:31:26,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:31:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744039604] [2023-02-18 17:31:26,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:31:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022763611] [2023-02-18 17:31:26,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022763611] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:31:26,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:31:26,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 42 [2023-02-18 17:31:26,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645162833] [2023-02-18 17:31:26,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:31:26,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-18 17:31:26,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:31:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-18 17:31:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 17:31:26,207 INFO L87 Difference]: Start difference. First operand 1681 states and 2608 transitions. Second operand has 42 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-18 17:31:38,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:31:41,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:48,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:31:56,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:32:04,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:32:07,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:32:12,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:28,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:33,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:41,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:44,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:32:50,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:33:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:33:01,871 INFO L93 Difference]: Finished difference Result 2184 states and 3344 transitions. [2023-02-18 17:33:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-18 17:33:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) Word has length 142 [2023-02-18 17:33:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:33:01,880 INFO L225 Difference]: With dead ends: 2184 [2023-02-18 17:33:01,880 INFO L226 Difference]: Without dead ends: 2174 [2023-02-18 17:33:01,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 251 SyntacticMatches, 8 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5537 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=2540, Invalid=14751, Unknown=1, NotChecked=0, Total=17292 [2023-02-18 17:33:01,882 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 444 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 778 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 4717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:33:01,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 691 Invalid, 4717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 3928 Invalid, 11 Unknown, 0 Unchecked, 64.5s Time] [2023-02-18 17:33:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2023-02-18 17:33:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1759. [2023-02-18 17:33:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 912 states have (on average 1.2730263157894737) internal successors, (1161), 921 states have internal predecessors, (1161), 782 states have call successors, (782), 64 states have call predecessors, (782), 64 states have return successors, (781), 773 states have call predecessors, (781), 781 states have call successors, (781) [2023-02-18 17:33:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2724 transitions. [2023-02-18 17:33:05,513 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2724 transitions. Word has length 142 [2023-02-18 17:33:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:33:05,513 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2724 transitions. [2023-02-18 17:33:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 15 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2023-02-18 17:33:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2724 transitions. [2023-02-18 17:33:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-18 17:33:05,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:33:05,517 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:33:05,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 17:33:05,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 17:33:05,723 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:33:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:33:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2005711590, now seen corresponding path program 5 times [2023-02-18 17:33:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:33:05,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257806217] [2023-02-18 17:33:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:33:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:33:05,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:33:05,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733110617] [2023-02-18 17:33:05,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:33:05,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:33:05,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:33:05,734 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:33:05,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 17:33:06,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:33:06,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:33:06,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-18 17:33:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:33:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 48 proven. 134 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-02-18 17:33:06,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:33:12,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:33:12,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257806217] [2023-02-18 17:33:12,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:33:12,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733110617] [2023-02-18 17:33:12,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733110617] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:33:12,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:33:12,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-18 17:33:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247439281] [2023-02-18 17:33:12,218 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:33:12,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 17:33:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:33:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 17:33:12,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1468, Unknown=1, NotChecked=0, Total=1722 [2023-02-18 17:33:12,219 INFO L87 Difference]: Start difference. First operand 1759 states and 2724 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 23 states have internal predecessors, (51), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-18 17:33:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:33:18,070 INFO L93 Difference]: Finished difference Result 1907 states and 2943 transitions. [2023-02-18 17:33:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 17:33:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 23 states have internal predecessors, (51), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 145 [2023-02-18 17:33:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:33:18,077 INFO L225 Difference]: With dead ends: 1907 [2023-02-18 17:33:18,077 INFO L226 Difference]: Without dead ends: 1905 [2023-02-18 17:33:18,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=485, Invalid=2706, Unknown=1, NotChecked=0, Total=3192 [2023-02-18 17:33:18,078 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 90 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 17:33:18,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 425 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 17:33:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2023-02-18 17:33:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1773. [2023-02-18 17:33:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 922 states have (on average 1.270065075921909) internal successors, (1171), 930 states have internal predecessors, (1171), 784 states have call successors, (784), 66 states have call predecessors, (784), 66 states have return successors, (783), 776 states have call predecessors, (783), 783 states have call successors, (783) [2023-02-18 17:33:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2738 transitions. [2023-02-18 17:33:22,248 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2738 transitions. Word has length 145 [2023-02-18 17:33:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:33:22,249 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2738 transitions. [2023-02-18 17:33:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 23 states have internal predecessors, (51), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-18 17:33:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2738 transitions. [2023-02-18 17:33:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-18 17:33:22,252 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:33:22,253 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:33:22,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 17:33:22,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 17:33:22,462 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:33:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:33:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1746764389, now seen corresponding path program 6 times [2023-02-18 17:33:22,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:33:22,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121365681] [2023-02-18 17:33:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:33:22,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:33:22,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:33:22,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132495513] [2023-02-18 17:33:22,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:33:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:33:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:33:22,473 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:33:22,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 17:34:43,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 17:34:43,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:34:43,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 17:34:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:34:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 193 proven. 84 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-02-18 17:34:52,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:34:57,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:34:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121365681] [2023-02-18 17:34:57,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:34:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132495513] [2023-02-18 17:34:57,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132495513] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:34:57,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:34:57,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-02-18 17:34:57,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992652483] [2023-02-18 17:34:57,386 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:34:57,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 17:34:57,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:34:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 17:34:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1144, Unknown=3, NotChecked=0, Total=1406 [2023-02-18 17:34:57,388 INFO L87 Difference]: Start difference. First operand 1773 states and 2738 transitions. Second operand has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 11 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-18 17:35:08,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:14,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:18,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:20,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:22,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:24,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:29,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:31,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:35:52,178 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse7 (+ .cse9 .cse8)) (.cse5 (div (+ (- |c_ULTIMATE.start_main_~b~0#1|) (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~x~0#1|) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~y~0#1|) (- 1)) 2)) (.cse6 (* (- 1) |c_ULTIMATE.start_main_~b~0#1|))) (and (not (>= |c_ULTIMATE.start_main_~c~0#1| (* 2 |c_ULTIMATE.start_main_~v~0#1|))) (exists ((|aux_div_ULTIMATE.start_main_~k~0#1_36| Int)) (let ((.cse4 (+ (* |aux_div_ULTIMATE.start_main_~k~0#1_36| 2) 0))) (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| (+ (* .cse4 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~s~0#1|))) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| (+ (* |c_ULTIMATE.start_main_~p~0#1| .cse4) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse3 (+ .cse6 .cse0 .cse1))) (let ((.cse2 (+ .cse3 |c_ULTIMATE.start_main_~b~0#1|))) (and (<= |c_ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1 (- 1))) (not (>= .cse2 (* 2 .cse3))) (= .cse3 (* |c_ULTIMATE.start_main_~a~0#1| .cse4)) (<= (+ (* (+ (* |c_ULTIMATE.start_main_~y~0#1| |aux_div_ULTIMATE.start_main_~k~0#1_36| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |aux_div_ULTIMATE.start_main_~k~0#1_36| |c_ULTIMATE.start_main_~p~0#1|) .cse5) 2) 2) .cse2))))))) (= |c_ULTIMATE.start_main_~v~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~d~0#1|)) (< 0 2) (>= |c_ULTIMATE.start_main_~y~0#1| 0) (= |c_ULTIMATE.start_main_~a~0#1| .cse7) (<= |c_ULTIMATE.start_main_~b~0#1| (+ .cse8 .cse9 (- 1))) (= |c_ULTIMATE.start_main_~c~0#1| .cse7) (>= |c_ULTIMATE.start_main_~x~0#1| 1) (not (>= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (<= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~a~0#1|) (<= (+ (* (div (+ |c_ULTIMATE.start_main_~v~0#1| (- 1)) 2) 2) 2) |c_ULTIMATE.start_main_~c~0#1|) (>= |c_ULTIMATE.start_main_~x~0#1| 0) (>= |c_ULTIMATE.start_main_~y~0#1| 1) (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0) (exists ((|aux_div_ULTIMATE.start_main_~k~0#1_36| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~p~0#1| Int)) (let ((.cse12 (+ (* |aux_div_ULTIMATE.start_main_~k~0#1_36| 2) 0))) (let ((.cse13 (* |c_ULTIMATE.start_main_~y~0#1| (+ (* .cse12 |ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~s~0#1|))) (.cse14 (* |c_ULTIMATE.start_main_~x~0#1| (+ (* |ULTIMATE.start_main_~p~0#1| .cse12) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse10 (+ .cse6 .cse13 .cse14))) (let ((.cse15 (+ .cse10 |c_ULTIMATE.start_main_~b~0#1|)) (.cse11 (+ (* |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (and (= .cse10 (* .cse11 .cse12)) (<= .cse11 (+ .cse13 .cse14 (- 1))) (<= |c_ULTIMATE.start_main_~b~0#1| .cse11) (<= (+ (* (+ (* |c_ULTIMATE.start_main_~y~0#1| |aux_div_ULTIMATE.start_main_~k~0#1_36| |ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |aux_div_ULTIMATE.start_main_~k~0#1_36| |ULTIMATE.start_main_~p~0#1|) .cse5) 2) 2) .cse15) (not (>= .cse15 (* 2 .cse10))) (not (>= |c_ULTIMATE.start_main_~b~0#1| .cse11)))))))) (= |c_ULTIMATE.start_main_~k~0#1| 0) (<= |c_ULTIMATE.start_main_~y~0#1| 10) (<= |c_ULTIMATE.start_main_~x~0#1| 10) (not (= 0 |c_ULTIMATE.start_main_~b~0#1|)) (= |c_ULTIMATE.start_main_~b~0#1| (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))))) is different from false [2023-02-18 17:35:54,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:36:01,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 17:36:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:36:07,272 INFO L93 Difference]: Finished difference Result 2747 states and 4336 transitions. [2023-02-18 17:36:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 17:36:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 11 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 147 [2023-02-18 17:36:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:36:07,282 INFO L225 Difference]: With dead ends: 2747 [2023-02-18 17:36:07,282 INFO L226 Difference]: Without dead ends: 2745 [2023-02-18 17:36:07,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=633, Invalid=2554, Unknown=9, NotChecked=110, Total=3306 [2023-02-18 17:36:07,283 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 78 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 145 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 38.9s IncrementalHoareTripleChecker+Time [2023-02-18 17:36:07,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 380 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1366 Invalid, 7 Unknown, 1 Unchecked, 38.9s Time] [2023-02-18 17:36:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-02-18 17:36:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2706. [2023-02-18 17:36:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 1362 states have (on average 1.2980910425844348) internal successors, (1768), 1386 states have internal predecessors, (1768), 1264 states have call successors, (1264), 79 states have call predecessors, (1264), 79 states have return successors, (1263), 1240 states have call predecessors, (1263), 1263 states have call successors, (1263) [2023-02-18 17:36:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 4295 transitions. [2023-02-18 17:36:13,637 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 4295 transitions. Word has length 147 [2023-02-18 17:36:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:36:13,638 INFO L495 AbstractCegarLoop]: Abstraction has 2706 states and 4295 transitions. [2023-02-18 17:36:13,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 21 states have internal predecessors, (47), 11 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2023-02-18 17:36:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 4295 transitions. [2023-02-18 17:36:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-18 17:36:13,642 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:36:13,642 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:36:13,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 17:36:13,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 17:36:13,851 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:36:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:36:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash -132362032, now seen corresponding path program 7 times [2023-02-18 17:36:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:36:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110041804] [2023-02-18 17:36:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:36:13,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:36:13,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:36:13,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340941188] [2023-02-18 17:36:13,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 17:36:13,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:36:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:36:13,862 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:36:13,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 17:36:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:36:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 17:36:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:36:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 93 proven. 85 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 17:36:14,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:36:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 90 proven. 76 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-02-18 17:36:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:36:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110041804] [2023-02-18 17:36:19,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:36:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340941188] [2023-02-18 17:36:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340941188] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:36:19,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:36:19,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2023-02-18 17:36:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526630255] [2023-02-18 17:36:19,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:36:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 17:36:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:36:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 17:36:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 17:36:19,397 INFO L87 Difference]: Start difference. First operand 2706 states and 4295 transitions. Second operand has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2023-02-18 17:36:33,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:36:39,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:36:59,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:37:01,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:37:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:37:29,143 INFO L93 Difference]: Finished difference Result 3903 states and 6219 transitions. [2023-02-18 17:37:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-18 17:37:29,144 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 151 [2023-02-18 17:37:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:37:29,154 INFO L225 Difference]: With dead ends: 3903 [2023-02-18 17:37:29,154 INFO L226 Difference]: Without dead ends: 2991 [2023-02-18 17:37:29,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1897, Invalid=7805, Unknown=0, NotChecked=0, Total=9702 [2023-02-18 17:37:29,158 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 255 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 650 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:37:29,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 415 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2672 Invalid, 2 Unknown, 0 Unchecked, 51.0s Time] [2023-02-18 17:37:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2023-02-18 17:37:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2846. [2023-02-18 17:37:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 1432 states have (on average 1.3016759776536313) internal successors, (1864), 1456 states have internal predecessors, (1864), 1332 states have call successors, (1332), 81 states have call predecessors, (1332), 81 states have return successors, (1331), 1308 states have call predecessors, (1331), 1331 states have call successors, (1331) [2023-02-18 17:37:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 4527 transitions. [2023-02-18 17:37:35,827 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 4527 transitions. Word has length 151 [2023-02-18 17:37:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:37:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 2846 states and 4527 transitions. [2023-02-18 17:37:35,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2023-02-18 17:37:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 4527 transitions. [2023-02-18 17:37:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 17:37:35,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:37:35,832 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:37:35,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 17:37:36,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:37:36,039 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:37:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:37:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash 329467692, now seen corresponding path program 7 times [2023-02-18 17:37:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:37:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684810381] [2023-02-18 17:37:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:37:36,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:37:36,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:37:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468829684] [2023-02-18 17:37:36,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 17:37:36,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:37:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:37:36,055 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:37:36,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 17:37:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:37:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 17:37:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:37:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 139 proven. 70 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2023-02-18 17:37:36,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:37:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 78 proven. 71 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-18 17:37:36,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:37:36,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684810381] [2023-02-18 17:37:36,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:37:36,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468829684] [2023-02-18 17:37:36,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468829684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:37:36,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:37:36,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2023-02-18 17:37:36,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314534158] [2023-02-18 17:37:36,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:37:36,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 17:37:36,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:37:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 17:37:36,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-02-18 17:37:36,524 INFO L87 Difference]: Start difference. First operand 2846 states and 4527 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 12 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 11 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-18 17:37:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:37:59,934 INFO L93 Difference]: Finished difference Result 6959 states and 11407 transitions. [2023-02-18 17:37:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2023-02-18 17:37:59,934 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 12 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 11 states have call predecessors, (42), 12 states have call successors, (42) Word has length 150 [2023-02-18 17:37:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:37:59,952 INFO L225 Difference]: With dead ends: 6959 [2023-02-18 17:37:59,952 INFO L226 Difference]: Without dead ends: 6204 [2023-02-18 17:37:59,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 266 SyntacticMatches, 4 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16774 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8117, Invalid=38323, Unknown=0, NotChecked=0, Total=46440 [2023-02-18 17:37:59,960 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 413 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 5265 mSolverCounterSat, 1965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1965 IncrementalHoareTripleChecker+Valid, 5265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:37:59,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 1751 Invalid, 7230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1965 Valid, 5265 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-02-18 17:37:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6204 states. [2023-02-18 17:38:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6204 to 4887. [2023-02-18 17:38:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4887 states, 2391 states have (on average 1.3274780426599748) internal successors, (3174), 2416 states have internal predecessors, (3174), 2414 states have call successors, (2414), 81 states have call predecessors, (2414), 81 states have return successors, (2413), 2389 states have call predecessors, (2413), 2413 states have call successors, (2413) [2023-02-18 17:38:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4887 states to 4887 states and 8001 transitions. [2023-02-18 17:38:12,111 INFO L78 Accepts]: Start accepts. Automaton has 4887 states and 8001 transitions. Word has length 150 [2023-02-18 17:38:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:38:12,111 INFO L495 AbstractCegarLoop]: Abstraction has 4887 states and 8001 transitions. [2023-02-18 17:38:12,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 12 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 11 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-18 17:38:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4887 states and 8001 transitions. [2023-02-18 17:38:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-18 17:38:12,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:38:12,116 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:38:12,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 17:38:12,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:38:12,323 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:38:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:38:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1203082276, now seen corresponding path program 8 times [2023-02-18 17:38:12,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:38:12,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391950352] [2023-02-18 17:38:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:38:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:38:12,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:38:12,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112300149] [2023-02-18 17:38:12,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:38:12,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:38:12,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:38:12,339 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:38:12,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 17:38:12,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:38:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:38:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 17:38:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:38:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 153 proven. 81 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2023-02-18 17:38:12,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:38:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 88 proven. 86 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-18 17:38:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:38:12,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391950352] [2023-02-18 17:38:12,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:38:12,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112300149] [2023-02-18 17:38:12,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112300149] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:38:12,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:38:12,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2023-02-18 17:38:12,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800531628] [2023-02-18 17:38:12,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:38:12,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 17:38:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:38:12,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 17:38:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2023-02-18 17:38:12,802 INFO L87 Difference]: Start difference. First operand 4887 states and 8001 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 12 states have call predecessors, (41), 12 states have call successors, (41) [2023-02-18 17:38:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:38:52,289 INFO L93 Difference]: Finished difference Result 14204 states and 23614 transitions. [2023-02-18 17:38:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-02-18 17:38:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 12 states have call predecessors, (41), 12 states have call successors, (41) Word has length 155 [2023-02-18 17:38:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:38:52,336 INFO L225 Difference]: With dead ends: 14204 [2023-02-18 17:38:52,336 INFO L226 Difference]: Without dead ends: 13124 [2023-02-18 17:38:52,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 274 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14630 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7665, Invalid=31737, Unknown=0, NotChecked=0, Total=39402 [2023-02-18 17:38:52,348 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 541 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 2087 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 6302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2087 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:38:52,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1193 Invalid, 6302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2087 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-02-18 17:38:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13124 states. [2023-02-18 17:39:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13124 to 5817. [2023-02-18 17:39:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 2791 states have (on average 1.3410963812253673) internal successors, (3743), 2817 states have internal predecessors, (3743), 2944 states have call successors, (2944), 81 states have call predecessors, (2944), 81 states have return successors, (2943), 2918 states have call predecessors, (2943), 2943 states have call successors, (2943) [2023-02-18 17:39:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 9630 transitions. [2023-02-18 17:39:07,128 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 9630 transitions. Word has length 155 [2023-02-18 17:39:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:39:07,128 INFO L495 AbstractCegarLoop]: Abstraction has 5817 states and 9630 transitions. [2023-02-18 17:39:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 12 states have call predecessors, (41), 12 states have call successors, (41) [2023-02-18 17:39:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 9630 transitions. [2023-02-18 17:39:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-18 17:39:07,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:39:07,133 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:39:07,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 17:39:07,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:39:07,341 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:39:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:39:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash -887462707, now seen corresponding path program 8 times [2023-02-18 17:39:07,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:39:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383931679] [2023-02-18 17:39:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:39:07,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:39:07,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:39:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293936817] [2023-02-18 17:39:07,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:39:07,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:39:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:39:07,414 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 17:39:07,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 17:39:07,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:39:07,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:39:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 125 conjunts are in the unsatisfiable core [2023-02-18 17:39:07,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:39:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 96 proven. 121 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 17:39:07,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:39:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 90 proven. 115 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2023-02-18 17:39:11,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:39:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383931679] [2023-02-18 17:39:11,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:39:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293936817] [2023-02-18 17:39:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293936817] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:39:11,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:39:11,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 47 [2023-02-18 17:39:11,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331906188] [2023-02-18 17:39:11,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:39:11,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 17:39:11,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:39:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 17:39:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 17:39:11,334 INFO L87 Difference]: Start difference. First operand 5817 states and 9630 transitions. Second operand has 47 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 16 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (47), 14 states have call predecessors, (47), 14 states have call successors, (47)