./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.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/hard-ll_valuebound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:26:15,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:26:15,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:26:15,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:26:15,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:26:15,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:26:15,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:26:15,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:26:15,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:26:15,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:26:15,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:26:15,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:26:15,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:26:15,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:26:15,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:26:15,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:26:15,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:26:15,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:26:15,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:26:15,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:26:15,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:26:15,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:26:15,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:26:15,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:26:15,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:26:15,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:26:15,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:26:15,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:26:15,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:26:15,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:26:15,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:26:15,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:26:15,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:26:15,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:26:15,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:26:15,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:26:15,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:26:15,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:26:15,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:26:15,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:26:15,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:26:15,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:26:15,140 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:26:15,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:26:15,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:26:15,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:26:15,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:26:15,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:26:15,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:26:15,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:26:15,143 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:26:15,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:26:15,143 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:26:15,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:26:15,145 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:26:15,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:26:15,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:26:15,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:26:15,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:26:15,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:26:15,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:26:15,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:26:15,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:26:15,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:26:15,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:26:15,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:26:15,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:26:15,158 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:26:15,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:26:15,158 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:26:15,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2023-02-17 07:26:15,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:26:15,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:26:15,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:26:15,389 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:26:15,392 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:26:15,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-02-17 07:26:16,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:26:16,598 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:26:16,598 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-02-17 07:26:16,602 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530e4b3da/0dfe502366344a91b80bf152f1fbd987/FLAG1c531315b [2023-02-17 07:26:16,612 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530e4b3da/0dfe502366344a91b80bf152f1fbd987 [2023-02-17 07:26:16,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:26:16,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:26:16,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:26:16,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:26:16,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:26:16,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdb10ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16, skipping insertion in model container [2023-02-17 07:26:16,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:26:16,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:26:16,723 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/hard-ll_valuebound5.c[538,551] [2023-02-17 07:26:16,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:26:16,738 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:26:16,745 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/hard-ll_valuebound5.c[538,551] [2023-02-17 07:26:16,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:26:16,759 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:26:16,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16 WrapperNode [2023-02-17 07:26:16,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:26:16,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:26:16,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:26:16,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:26:16,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,784 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-17 07:26:16,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:26:16,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:26:16,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:26:16,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:26:16,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:26:16,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:26:16,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:26:16,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:26:16,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (1/1) ... [2023-02-17 07:26:16,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:26:16,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:16,850 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) [2023-02-17 07:26:16,868 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 [2023-02-17 07:26:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:26:16,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 07:26:16,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 07:26:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:26:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:26:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:26:16,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:26:16,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:26:16,920 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:26:16,921 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:26:17,054 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:26:17,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:26:17,061 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 07:26:17,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:26:17 BoogieIcfgContainer [2023-02-17 07:26:17,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:26:17,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:26:17,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:26:17,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:26:17,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:26:16" (1/3) ... [2023-02-17 07:26:17,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573879f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:26:17, skipping insertion in model container [2023-02-17 07:26:17,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:26:16" (2/3) ... [2023-02-17 07:26:17,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573879f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:26:17, skipping insertion in model container [2023-02-17 07:26:17,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:26:17" (3/3) ... [2023-02-17 07:26:17,081 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2023-02-17 07:26:17,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:26:17,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:26:17,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:26:17,167 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;@7fd09e89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:26:17,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:26:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 07:26:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 07:26:17,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:17,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:17,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-02-17 07:26:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:17,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593474042] [2023-02-17 07:26:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:17,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:26:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 07:26:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 07:26:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 07:26:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593474042] [2023-02-17 07:26:17,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593474042] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:26:17,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:26:17,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:26:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870497003] [2023-02-17 07:26:17,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:26:17,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:26:17,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:26:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:26:17,389 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 07:26:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:17,410 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-02-17 07:26:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:26:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-17 07:26:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:17,419 INFO L225 Difference]: With dead ends: 63 [2023-02-17 07:26:17,419 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 07:26:17,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:26:17,425 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:17,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:26:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 07:26:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-17 07:26:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:26:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-17 07:26:17,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-02-17 07:26:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:17,457 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-17 07:26:17,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 07:26:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-17 07:26:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 07:26:17,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:17,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 07:26:17,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-02-17 07:26:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505898366] [2023-02-17 07:26:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:26:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 07:26:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 07:26:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 07:26:17,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:17,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505898366] [2023-02-17 07:26:17,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505898366] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:26:17,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:26:17,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:26:17,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999339863] [2023-02-17 07:26:17,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:26:17,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:26:17,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:17,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:26:17,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:26:17,651 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 07:26:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:17,710 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-17 07:26:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:26:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-17 07:26:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:17,712 INFO L225 Difference]: With dead ends: 42 [2023-02-17 07:26:17,712 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 07:26:17,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:26:17,713 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:17,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:26:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 07:26:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-17 07:26:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:26:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-17 07:26:17,725 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-02-17 07:26:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:17,725 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-17 07:26:17,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 07:26:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-17 07:26:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 07:26:17,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:17,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:17,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 07:26:17,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-02-17 07:26:17,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:17,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264778271] [2023-02-17 07:26:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:17,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:26:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 07:26:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-17 07:26:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 07:26:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 07:26:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:17,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264778271] [2023-02-17 07:26:17,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264778271] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:26:17,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:26:17,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:26:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842070295] [2023-02-17 07:26:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:26:17,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:26:17,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:26:17,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:26:17,846 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 07:26:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:17,887 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-02-17 07:26:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:26:17,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-17 07:26:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:17,888 INFO L225 Difference]: With dead ends: 46 [2023-02-17 07:26:17,888 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 07:26:17,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:26:17,890 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:17,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:26:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 07:26:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-02-17 07:26:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:26:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-17 07:26:17,906 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-02-17 07:26:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:17,906 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-17 07:26:17,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 07:26:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-17 07:26:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 07:26:17,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:17,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:17,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 07:26:17,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-02-17 07:26:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:17,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775397222] [2023-02-17 07:26:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:17,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:17,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758577438] [2023-02-17 07:26:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:17,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:17,927 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) [2023-02-17 07:26:17,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:26:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:17,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:26:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 07:26:18,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:26:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 07:26:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:18,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775397222] [2023-02-17 07:26:18,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:18,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758577438] [2023-02-17 07:26:18,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758577438] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:26:18,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:26:18,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 07:26:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178110547] [2023-02-17 07:26:18,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:26:18,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:26:18,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:18,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:26:18,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:26:18,161 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 07:26:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:18,318 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2023-02-17 07:26:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 07:26:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2023-02-17 07:26:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:18,320 INFO L225 Difference]: With dead ends: 72 [2023-02-17 07:26:18,320 INFO L226 Difference]: Without dead ends: 57 [2023-02-17 07:26:18,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:26:18,322 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:18,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 137 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:26:18,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-17 07:26:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-02-17 07:26:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 07:26:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-02-17 07:26:18,346 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 34 [2023-02-17 07:26:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:18,347 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-02-17 07:26:18,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 07:26:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-02-17 07:26:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 07:26:18,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:18,348 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:18,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 07:26:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:18,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-02-17 07:26:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:18,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859561133] [2023-02-17 07:26:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:18,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:18,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460954998] [2023-02-17 07:26:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:18,570 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) [2023-02-17 07:26:18,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:26:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 07:26:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 07:26:18,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:26:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 07:26:18,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859561133] [2023-02-17 07:26:18,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:18,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460954998] [2023-02-17 07:26:18,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460954998] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:26:18,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:26:18,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-17 07:26:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117315583] [2023-02-17 07:26:18,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:26:18,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 07:26:18,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 07:26:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:26:18,991 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-17 07:26:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:19,285 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2023-02-17 07:26:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:26:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2023-02-17 07:26:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:19,286 INFO L225 Difference]: With dead ends: 69 [2023-02-17 07:26:19,286 INFO L226 Difference]: Without dead ends: 62 [2023-02-17 07:26:19,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:26:19,287 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:19,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 100 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:26:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-17 07:26:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-17 07:26:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 07:26:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2023-02-17 07:26:19,295 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2023-02-17 07:26:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:19,295 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2023-02-17 07:26:19,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-02-17 07:26:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2023-02-17 07:26:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 07:26:19,297 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:19,297 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 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] [2023-02-17 07:26:19,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 07:26:19,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:19,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2023-02-17 07:26:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:19,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896116800] [2023-02-17 07:26:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:19,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432086383] [2023-02-17 07:26:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:19,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:19,515 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) [2023-02-17 07:26:19,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:26:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 07:26:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-17 07:26:19,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:26:19,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:19,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896116800] [2023-02-17 07:26:19,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:19,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432086383] [2023-02-17 07:26:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432086383] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:26:19,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:26:19,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 07:26:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529810030] [2023-02-17 07:26:19,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:26:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:26:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:26:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:26:19,590 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 07:26:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:19,618 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2023-02-17 07:26:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:26:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2023-02-17 07:26:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:19,621 INFO L225 Difference]: With dead ends: 70 [2023-02-17 07:26:19,621 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 07:26:19,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:26:19,623 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:19,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:26:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 07:26:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-17 07:26:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-17 07:26:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-02-17 07:26:19,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 69 [2023-02-17 07:26:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:19,645 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-02-17 07:26:19,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 07:26:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-02-17 07:26:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 07:26:19,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:19,649 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:19,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:26:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:19,854 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-02-17 07:26:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:19,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257211594] [2023-02-17 07:26:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:19,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:19,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:19,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811272576] [2023-02-17 07:26:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:19,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:19,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:19,863 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) [2023-02-17 07:26:19,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:26:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:19,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 07:26:19,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-02-17 07:26:20,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:26:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-17 07:26:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257211594] [2023-02-17 07:26:20,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811272576] [2023-02-17 07:26:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811272576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:26:20,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:26:20,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-02-17 07:26:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432146221] [2023-02-17 07:26:20,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:26:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 07:26:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 07:26:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-02-17 07:26:20,934 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-17 07:26:24,548 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 [] [2023-02-17 07:26:26,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:26,034 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2023-02-17 07:26:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 07:26:26,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 71 [2023-02-17 07:26:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:26,036 INFO L225 Difference]: With dead ends: 140 [2023-02-17 07:26:26,036 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 07:26:26,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-02-17 07:26:26,038 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:26,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 197 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 433 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-02-17 07:26:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 07:26:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2023-02-17 07:26:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.126984126984127) internal successors, (71), 68 states have internal predecessors, (71), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-17 07:26:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2023-02-17 07:26:26,063 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 71 [2023-02-17 07:26:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:26,063 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2023-02-17 07:26:26,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-17 07:26:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2023-02-17 07:26:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-17 07:26:26,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:26,067 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:26,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 07:26:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:26,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2023-02-17 07:26:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411220327] [2023-02-17 07:26:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:26,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:26,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:26,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274049739] [2023-02-17 07:26:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:26,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:26,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:26,303 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) [2023-02-17 07:26:26,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:26:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:26:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 07:26:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-02-17 07:26:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:26:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-17 07:26:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411220327] [2023-02-17 07:26:27,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274049739] [2023-02-17 07:26:27,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274049739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:26:27,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:26:27,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-02-17 07:26:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308703787] [2023-02-17 07:26:27,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:26:27,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 07:26:27,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:27,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 07:26:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:26:27,123 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2023-02-17 07:26:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:28,004 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2023-02-17 07:26:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 07:26:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 82 [2023-02-17 07:26:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:28,005 INFO L225 Difference]: With dead ends: 149 [2023-02-17 07:26:28,005 INFO L226 Difference]: Without dead ends: 110 [2023-02-17 07:26:28,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2023-02-17 07:26:28,006 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:28,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 186 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 07:26:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-17 07:26:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2023-02-17 07:26:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-17 07:26:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2023-02-17 07:26:28,020 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 82 [2023-02-17 07:26:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:28,021 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2023-02-17 07:26:28,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2023-02-17 07:26:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2023-02-17 07:26:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-17 07:26:28,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:28,022 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:28,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 07:26:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:28,227 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2023-02-17 07:26:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:28,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142941994] [2023-02-17 07:26:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:28,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327704768] [2023-02-17 07:26:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:26:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:28,242 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) [2023-02-17 07:26:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:26:28,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:26:28,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:26:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 07:26:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-17 07:26:28,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:26:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-02-17 07:26:28,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:28,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142941994] [2023-02-17 07:26:28,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:28,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327704768] [2023-02-17 07:26:28,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327704768] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:26:28,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:26:28,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-02-17 07:26:28,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314193106] [2023-02-17 07:26:28,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:26:28,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:26:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:26:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:26:28,315 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-17 07:26:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:28,359 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2023-02-17 07:26:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:26:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2023-02-17 07:26:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:28,362 INFO L225 Difference]: With dead ends: 108 [2023-02-17 07:26:28,362 INFO L226 Difference]: Without dead ends: 81 [2023-02-17 07:26:28,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:26:28,364 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:28,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:26:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-17 07:26:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-17 07:26:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-17 07:26:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-02-17 07:26:28,384 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 84 [2023-02-17 07:26:28,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:28,385 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-02-17 07:26:28,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-17 07:26:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-02-17 07:26:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 07:26:28,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:28,389 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:26:28,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 07:26:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:28,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2023-02-17 07:26:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:28,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532697751] [2023-02-17 07:26:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:28,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:28,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411037561] [2023-02-17 07:26:28,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:26:28,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:28,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:28,609 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) [2023-02-17 07:26:28,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:26:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 07:26:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:26:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 07:26:28,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:26:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-02-17 07:26:28,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:26:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-02-17 07:26:32,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:26:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532697751] [2023-02-17 07:26:32,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:26:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411037561] [2023-02-17 07:26:32,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411037561] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:26:32,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:26:32,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-17 07:26:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394741863] [2023-02-17 07:26:32,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:26:32,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 07:26:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:26:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 07:26:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-02-17 07:26:32,055 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-17 07:26:41,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:26:43,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:26:47,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:26:58,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:26:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:26:58,584 INFO L93 Difference]: Finished difference Result 187 states and 238 transitions. [2023-02-17 07:26:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 07:26:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 101 [2023-02-17 07:26:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:26:58,589 INFO L225 Difference]: With dead ends: 187 [2023-02-17 07:26:58,589 INFO L226 Difference]: Without dead ends: 164 [2023-02-17 07:26:58,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=224, Invalid=830, Unknown=2, NotChecked=0, Total=1056 [2023-02-17 07:26:58,590 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 124 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 154 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-02-17 07:26:58,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 301 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 896 Invalid, 1 Unknown, 0 Unchecked, 15.6s Time] [2023-02-17 07:26:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-17 07:26:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 133. [2023-02-17 07:26:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 86 states have internal predecessors, (94), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-17 07:26:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2023-02-17 07:26:58,672 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 101 [2023-02-17 07:26:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:26:58,673 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2023-02-17 07:26:58,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-17 07:26:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2023-02-17 07:26:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-17 07:26:58,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:26:58,674 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 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] [2023-02-17 07:26:58,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 07:26:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:58,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:26:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:26:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 144924505, now seen corresponding path program 4 times [2023-02-17 07:26:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:26:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066246441] [2023-02-17 07:26:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:26:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:26:58,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:26:58,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214073659] [2023-02-17 07:26:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:26:58,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:26:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:26:58,901 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) [2023-02-17 07:26:58,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:26:58,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:26:58,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:26:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 07:26:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:27:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2023-02-17 07:27:00,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:27:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-02-17 07:27:05,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:27:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066246441] [2023-02-17 07:27:05,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:27:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214073659] [2023-02-17 07:27:05,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214073659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:27:05,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:27:05,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2023-02-17 07:27:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157510749] [2023-02-17 07:27:05,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:27:05,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 07:27:05,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:27:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 07:27:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2023-02-17 07:27:05,429 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) [2023-02-17 07:27:09,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:27:11,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:27:27,039 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 [] [2023-02-17 07:27:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:27:28,305 INFO L93 Difference]: Finished difference Result 171 states and 205 transitions. [2023-02-17 07:27:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 07:27:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) Word has length 106 [2023-02-17 07:27:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:27:28,307 INFO L225 Difference]: With dead ends: 171 [2023-02-17 07:27:28,308 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 07:27:28,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=348, Invalid=1543, Unknown=1, NotChecked=0, Total=1892 [2023-02-17 07:27:28,309 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 68 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 128 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2023-02-17 07:27:28,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 265 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 817 Invalid, 2 Unknown, 0 Unchecked, 14.8s Time] [2023-02-17 07:27:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 07:27:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2023-02-17 07:27:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 83 states have (on average 1.072289156626506) internal successors, (89), 86 states have internal predecessors, (89), 31 states have call successors, (31), 17 states have call predecessors, (31), 17 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-17 07:27:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2023-02-17 07:27:28,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 106 [2023-02-17 07:27:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:27:28,382 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2023-02-17 07:27:28,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 14 states have call successors, (34) [2023-02-17 07:27:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2023-02-17 07:27:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-17 07:27:28,384 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:27:28,384 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:27:28,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:27:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 07:27:28,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:27:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:27:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1168936300, now seen corresponding path program 2 times [2023-02-17 07:27:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:27:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890325395] [2023-02-17 07:27:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:27:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:27:28,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:27:28,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568965420] [2023-02-17 07:27:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:27:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:27:28,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:27:28,609 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) [2023-02-17 07:27:28,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 07:27:28,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:27:28,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:27:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 07:27:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:27:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2023-02-17 07:27:29,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:27:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-02-17 07:27:31,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:27:31,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890325395] [2023-02-17 07:27:31,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:27:31,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568965420] [2023-02-17 07:27:31,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568965420] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:27:31,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:27:31,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2023-02-17 07:27:31,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956144649] [2023-02-17 07:27:31,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:27:31,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 07:27:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:27:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 07:27:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2023-02-17 07:27:31,519 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 17 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) [2023-02-17 07:27:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:27:45,688 INFO L93 Difference]: Finished difference Result 157 states and 182 transitions. [2023-02-17 07:27:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 07:27:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 17 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) Word has length 112 [2023-02-17 07:27:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:27:45,690 INFO L225 Difference]: With dead ends: 157 [2023-02-17 07:27:45,690 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 07:27:45,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 181 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 07:27:45,691 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2023-02-17 07:27:45,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 241 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2023-02-17 07:27:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 07:27:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2023-02-17 07:27:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 25 states have call successors, (25), 16 states have call predecessors, (25), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-17 07:27:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2023-02-17 07:27:45,747 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2023-02-17 07:27:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:27:45,747 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2023-02-17 07:27:45,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 17 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 15 states have call predecessors, (36), 15 states have call successors, (36) [2023-02-17 07:27:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2023-02-17 07:27:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 07:27:45,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:27:45,750 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 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] [2023-02-17 07:27:45,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 07:27:45,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:27:45,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:27:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:27:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash -227977520, now seen corresponding path program 1 times [2023-02-17 07:27:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:27:45,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305290302] [2023-02-17 07:27:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:27:45,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:27:45,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:27:45,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794999876] [2023-02-17 07:27:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:27:45,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:27:45,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:27:45,966 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) [2023-02-17 07:27:45,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 07:27:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:27:46,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 07:27:46,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:27:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 33 proven. 96 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2023-02-17 07:27:54,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:27:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 33 proven. 90 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-02-17 07:27:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:27:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305290302] [2023-02-17 07:27:57,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:27:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794999876] [2023-02-17 07:27:57,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794999876] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:27:57,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:27:57,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 28 [2023-02-17 07:27:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362574684] [2023-02-17 07:27:57,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:27:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 07:27:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:27:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 07:27:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-02-17 07:27:57,797 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 25 states have internal predecessors, (55), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) [2023-02-17 07:28:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:28:07,666 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2023-02-17 07:28:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 07:28:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 25 states have internal predecessors, (55), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) Word has length 123 [2023-02-17 07:28:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:28:07,668 INFO L225 Difference]: With dead ends: 174 [2023-02-17 07:28:07,668 INFO L226 Difference]: Without dead ends: 156 [2023-02-17 07:28:07,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 07:28:07,669 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 94 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-02-17 07:28:07,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 277 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-02-17 07:28:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-17 07:28:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2023-02-17 07:28:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 97 states have internal predecessors, (100), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2023-02-17 07:28:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2023-02-17 07:28:07,779 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 123 [2023-02-17 07:28:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:28:07,780 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2023-02-17 07:28:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 25 states have internal predecessors, (55), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) [2023-02-17 07:28:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2023-02-17 07:28:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-17 07:28:07,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:28:07,781 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:28:07,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 07:28:07,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 07:28:07,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:28:07,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:28:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1330691261, now seen corresponding path program 5 times [2023-02-17 07:28:07,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:28:07,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75019103] [2023-02-17 07:28:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:28:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:28:07,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:28:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115503405] [2023-02-17 07:28:07,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 07:28:07,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:28:07,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:28:07,995 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) [2023-02-17 07:28:07,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 07:28:08,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-17 07:28:08,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:28:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 07:28:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:28:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 222 proven. 62 refuted. 15 times theorem prover too weak. 412 trivial. 0 not checked. [2023-02-17 07:28:19,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:28:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:28:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75019103] [2023-02-17 07:28:20,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:28:20,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115503405] [2023-02-17 07:28:20,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115503405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:28:20,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:28:20,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-17 07:28:20,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900696602] [2023-02-17 07:28:20,427 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:28:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 07:28:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:28:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 07:28:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=426, Unknown=8, NotChecked=0, Total=506 [2023-02-17 07:28:20,428 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-17 07:28:22,916 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] [2023-02-17 07:28:24,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:27,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:32,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:34,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:36,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:38,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:40,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:42,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:47,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:49,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:52,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:55,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:28:57,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:02,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:04,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:07,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:21,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:23,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:26,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:28,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:32,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:34,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:36,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:39,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:41,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:43,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-17 07:29:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:29:43,929 INFO L93 Difference]: Finished difference Result 191 states and 233 transitions. [2023-02-17 07:29:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 07:29:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 131 [2023-02-17 07:29:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:29:43,930 INFO L225 Difference]: With dead ends: 191 [2023-02-17 07:29:43,930 INFO L226 Difference]: Without dead ends: 146 [2023-02-17 07:29:43,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=195, Invalid=912, Unknown=15, NotChecked=0, Total=1122 [2023-02-17 07:29:43,931 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 81 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.5s IncrementalHoareTripleChecker+Time [2023-02-17 07:29:43,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 259 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 601 Invalid, 25 Unknown, 0 Unchecked, 62.5s Time] [2023-02-17 07:29:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-17 07:29:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2023-02-17 07:29:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.072289156626506) internal successors, (89), 87 states have internal predecessors, (89), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-17 07:29:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2023-02-17 07:29:44,044 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 131 [2023-02-17 07:29:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:29:44,044 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2023-02-17 07:29:44,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-17 07:29:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2023-02-17 07:29:44,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-17 07:29:44,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:29:44,046 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:29:44,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 07:29:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 07:29:44,251 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:29:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:29:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -358252481, now seen corresponding path program 2 times [2023-02-17 07:29:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:29:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865755238] [2023-02-17 07:29:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:29:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:29:44,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:29:44,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859376982] [2023-02-17 07:29:44,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:29:44,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:29:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:29:44,265 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) [2023-02-17 07:29:44,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 07:29:44,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:29:44,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:29:44,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-17 07:29:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:29:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 38 proven. 106 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2023-02-17 07:29:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:29:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2023-02-17 07:29:57,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:29:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865755238] [2023-02-17 07:29:57,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:29:57,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859376982] [2023-02-17 07:29:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859376982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:29:57,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:29:57,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-02-17 07:29:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306587845] [2023-02-17 07:29:57,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:29:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 07:29:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:29:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 07:29:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-02-17 07:29:57,189 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 18 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2023-02-17 07:30:23,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:30:35,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:30:42,391 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 [] [2023-02-17 07:30:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:30:45,566 INFO L93 Difference]: Finished difference Result 175 states and 202 transitions. [2023-02-17 07:30:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-17 07:30:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 18 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) Word has length 131 [2023-02-17 07:30:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:30:45,568 INFO L225 Difference]: With dead ends: 175 [2023-02-17 07:30:45,568 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 07:30:45,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 227 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=450, Invalid=1711, Unknown=1, NotChecked=0, Total=2162 [2023-02-17 07:30:45,569 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 172 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2023-02-17 07:30:45,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 313 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1508 Invalid, 2 Unknown, 0 Unchecked, 31.6s Time] [2023-02-17 07:30:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 07:30:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2023-02-17 07:30:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 106 states have internal predecessors, (110), 37 states have call successors, (37), 21 states have call predecessors, (37), 21 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-17 07:30:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2023-02-17 07:30:45,763 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 131 [2023-02-17 07:30:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:30:45,764 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2023-02-17 07:30:45,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 29 states have internal predecessors, (61), 18 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2023-02-17 07:30:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2023-02-17 07:30:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-17 07:30:45,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:30:45,765 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:30:45,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 07:30:45,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 07:30:45,971 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:30:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:30:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1247963689, now seen corresponding path program 1 times [2023-02-17 07:30:45,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:30:45,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368793499] [2023-02-17 07:30:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:30:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:30:45,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:30:45,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706875731] [2023-02-17 07:30:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:30:45,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:30:45,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:30:45,990 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) [2023-02-17 07:30:45,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 07:30:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:30:46,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-17 07:30:46,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:30:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 39 proven. 121 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2023-02-17 07:30:48,312 INFO L328 TraceCheckSpWp]: Computing backward predicates...