./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:02:15,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:02:15,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:02:15,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:02:15,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:02:15,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:02:15,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:02:15,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:02:15,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:02:15,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:02:15,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:02:15,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:02:15,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:02:15,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:02:15,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:02:15,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:02:15,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:02:15,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:02:15,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:02:15,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:02:15,387 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:02:15,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:02:15,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:02:15,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:02:15,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:02:15,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:02:15,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:02:15,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:02:15,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:02:15,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:02:15,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:02:15,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:02:15,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:02:15,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:02:15,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:02:15,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:02:15,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:02:15,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:02:15,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:02:15,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:02:15,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:02:15,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:02:15,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:02:15,427 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:02:15,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:02:15,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:02:15,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:02:15,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:02:15,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:02:15,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:02:15,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:02:15,429 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:02:15,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:02:15,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:02:15,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:02:15,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:02:15,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:02:15,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:02:15,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:02:15,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:02:15,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:02:15,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:02:15,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:02:15,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2022-07-22 16:02:15,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:02:15,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:02:15,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:02:15,680 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:02:15,680 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:02:15,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-07-22 16:02:15,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2881a0fb0/969e8a869d624ff79ed6b9c8414e8275/FLAG060d95c0f [2022-07-22 16:02:16,040 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:02:16,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-07-22 16:02:16,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2881a0fb0/969e8a869d624ff79ed6b9c8414e8275/FLAG060d95c0f [2022-07-22 16:02:16,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2881a0fb0/969e8a869d624ff79ed6b9c8414e8275 [2022-07-22 16:02:16,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:02:16,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:02:16,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:02:16,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:02:16,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:02:16,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29907f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16, skipping insertion in model container [2022-07-22 16:02:16,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:02:16,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:02:16,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-07-22 16:02:16,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:02:16,613 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:02:16,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-07-22 16:02:16,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:02:16,635 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:02:16,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16 WrapperNode [2022-07-22 16:02:16,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:02:16,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:02:16,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:02:16,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:02:16,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,670 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-22 16:02:16,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:02:16,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:02:16,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:02:16,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:02:16,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:02:16,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:02:16,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:02:16,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:02:16,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (1/1) ... [2022-07-22 16:02:16,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:02:16,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:16,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 16:02:16,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 16:02:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:02:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 16:02:16,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 16:02:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:02:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:02:16,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:02:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:02:16,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:02:16,821 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:02:16,823 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:02:16,965 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:02:16,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:02:16,968 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 16:02:16,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:02:16 BoogieIcfgContainer [2022-07-22 16:02:16,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:02:16,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:02:16,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:02:16,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:02:16,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:02:16" (1/3) ... [2022-07-22 16:02:16,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfebe79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:02:16, skipping insertion in model container [2022-07-22 16:02:16,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:02:16" (2/3) ... [2022-07-22 16:02:16,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfebe79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:02:16, skipping insertion in model container [2022-07-22 16:02:16,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:02:16" (3/3) ... [2022-07-22 16:02:16,976 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2022-07-22 16:02:16,984 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:02:16,984 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:02:17,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:02:17,015 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50f2ccf2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@458966b4 [2022-07-22 16:02:17,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:02:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 16:02:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 16:02:17,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:17,036 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:17,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-07-22 16:02:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659817687] [2022-07-22 16:02:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:02:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:02:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:02:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 16:02:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 16:02:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 16:02:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 16:02:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659817687] [2022-07-22 16:02:17,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659817687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:02:17,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:02:17,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:02:17,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609391125] [2022-07-22 16:02:17,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:02:17,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:02:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:17,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:02:17,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:02:17,244 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:02:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:17,267 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-07-22 16:02:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:02:17,269 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-22 16:02:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:17,276 INFO L225 Difference]: With dead ends: 67 [2022-07-22 16:02:17,276 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 16:02:17,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:02:17,283 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:17,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:02:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 16:02:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-22 16:02:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:02:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-07-22 16:02:17,328 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-07-22 16:02:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:17,329 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-07-22 16:02:17,329 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:02:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-07-22 16:02:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 16:02:17,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:17,332 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:17,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:02:17,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-07-22 16:02:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:17,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040953030] [2022-07-22 16:02:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:17,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311391626] [2022-07-22 16:02:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:17,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:17,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:17,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:17,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:02:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:02:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 16:02:17,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 16:02:17,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:17,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040953030] [2022-07-22 16:02:17,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:17,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311391626] [2022-07-22 16:02:17,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311391626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:02:17,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:02:17,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-22 16:02:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101263138] [2022-07-22 16:02:17,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:17,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 16:02:17,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 16:02:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:02:17,565 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:02:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:17,655 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-07-22 16:02:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:02:17,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-07-22 16:02:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:17,656 INFO L225 Difference]: With dead ends: 48 [2022-07-22 16:02:17,657 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 16:02:17,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 16:02:17,658 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:17,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 108 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:02:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 16:02:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-22 16:02:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:02:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-22 16:02:17,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-07-22 16:02:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:17,666 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-22 16:02:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:02:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-22 16:02:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 16:02:17,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:17,668 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:17,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:17,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-07-22 16:02:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:17,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353411354] [2022-07-22 16:02:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:17,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:17,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533282494] [2022-07-22 16:02:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:17,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:17,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:17,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:17,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:02:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 16:02:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 16:02:18,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 16:02:18,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353411354] [2022-07-22 16:02:18,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533282494] [2022-07-22 16:02:18,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533282494] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:18,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:18,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 16:02:18,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935108205] [2022-07-22 16:02:18,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:02:18,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:02:18,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:18,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:02:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:02:18,064 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 16:02:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:18,106 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-22 16:02:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:02:18,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-22 16:02:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:18,107 INFO L225 Difference]: With dead ends: 39 [2022-07-22 16:02:18,107 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 16:02:18,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:02:18,109 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 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 [2022-07-22 16:02:18,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:02:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 16:02:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-22 16:02:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:02:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-22 16:02:18,114 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-07-22 16:02:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:18,115 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-22 16:02:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 16:02:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-22 16:02:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 16:02:18,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:18,116 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:18,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:18,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 16:02:18,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-07-22 16:02:18,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:18,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383909490] [2022-07-22 16:02:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:18,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50667152] [2022-07-22 16:02:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:18,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:18,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:18,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:18,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:02:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 16:02:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 16:02:18,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:02:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383909490] [2022-07-22 16:02:18,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50667152] [2022-07-22 16:02:18,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50667152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:02:18,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:02:18,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:02:18,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034534522] [2022-07-22 16:02:18,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:02:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:02:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:18,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:02:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:02:18,434 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 16:02:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:18,465 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-07-22 16:02:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:02:18,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-07-22 16:02:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:18,466 INFO L225 Difference]: With dead ends: 50 [2022-07-22 16:02:18,467 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 16:02:18,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:02:18,468 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:18,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:02:18,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 16:02:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-22 16:02:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 16:02:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-07-22 16:02:18,475 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-07-22 16:02:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:18,475 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-07-22 16:02:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 16:02:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-07-22 16:02:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 16:02:18,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:18,476 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:18,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:18,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:18,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-07-22 16:02:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:18,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809948713] [2022-07-22 16:02:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:18,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:18,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249578361] [2022-07-22 16:02:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:18,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:18,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:02:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 16:02:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 16:02:18,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 16:02:19,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:19,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809948713] [2022-07-22 16:02:19,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:19,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249578361] [2022-07-22 16:02:19,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249578361] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:19,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:19,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 16:02:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286240046] [2022-07-22 16:02:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:02:19,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:02:19,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:02:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:02:19,023 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 16:02:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:19,063 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-07-22 16:02:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:02:19,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-07-22 16:02:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:19,065 INFO L225 Difference]: With dead ends: 54 [2022-07-22 16:02:19,065 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 16:02:19,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:02:19,066 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:19,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:02:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 16:02:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-22 16:02:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 16:02:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-07-22 16:02:19,073 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-07-22 16:02:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:19,073 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-07-22 16:02:19,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 16:02:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-07-22 16:02:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 16:02:19,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:19,075 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:19,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:19,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:19,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-07-22 16:02:19,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932462456] [2022-07-22 16:02:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:19,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:19,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917223577] [2022-07-22 16:02:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:19,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:19,322 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:19,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:02:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:19,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 16:02:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 16:02:19,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932462456] [2022-07-22 16:02:19,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917223577] [2022-07-22 16:02:19,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917223577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:19,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:19,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-22 16:02:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659600732] [2022-07-22 16:02:19,783 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 16:02:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 16:02:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:02:19,784 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 16:02:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:19,961 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-22 16:02:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:02:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-07-22 16:02:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:19,964 INFO L225 Difference]: With dead ends: 60 [2022-07-22 16:02:19,964 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 16:02:19,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-07-22 16:02:19,966 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:19,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 120 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:02:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 16:02:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-07-22 16:02:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 16:02:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-22 16:02:19,985 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-07-22 16:02:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:19,985 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-22 16:02:19,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 16:02:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-22 16:02:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 16:02:19,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:19,989 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:20,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:20,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:20,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-07-22 16:02:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:20,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233288837] [2022-07-22 16:02:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:20,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396295053] [2022-07-22 16:02:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:20,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:20,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:20,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:20,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:02:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 16:02:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 16:02:20,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 16:02:20,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233288837] [2022-07-22 16:02:20,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396295053] [2022-07-22 16:02:20,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396295053] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:02:20,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:02:20,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-22 16:02:20,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997229259] [2022-07-22 16:02:20,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:20,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 16:02:20,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 16:02:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 16:02:20,416 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 16:02:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:20,550 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-07-22 16:02:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:02:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-07-22 16:02:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:20,554 INFO L225 Difference]: With dead ends: 102 [2022-07-22 16:02:20,554 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 16:02:20,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:02:20,569 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:20,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 195 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:02:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 16:02:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-22 16:02:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-22 16:02:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-07-22 16:02:20,586 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-07-22 16:02:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:20,587 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-07-22 16:02:20,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 16:02:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-07-22 16:02:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 16:02:20,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:20,588 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:20,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 16:02:20,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:20,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-07-22 16:02:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391890689] [2022-07-22 16:02:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:20,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:20,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:20,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463177876] [2022-07-22 16:02:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:20,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:20,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:20,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:02:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 16:02:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-22 16:02:20,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-22 16:02:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391890689] [2022-07-22 16:02:21,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463177876] [2022-07-22 16:02:21,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463177876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:02:21,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:02:21,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-22 16:02:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102711849] [2022-07-22 16:02:21,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:21,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 16:02:21,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 16:02:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:02:21,049 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-22 16:02:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:21,333 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-07-22 16:02:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:02:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 71 [2022-07-22 16:02:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:21,336 INFO L225 Difference]: With dead ends: 128 [2022-07-22 16:02:21,336 INFO L226 Difference]: Without dead ends: 124 [2022-07-22 16:02:21,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:02:21,337 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:21,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 165 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:02:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-22 16:02:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-07-22 16:02:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 16:02:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-07-22 16:02:21,349 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-07-22 16:02:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:21,349 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-07-22 16:02:21,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-22 16:02:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-07-22 16:02:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 16:02:21,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:21,351 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:21,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:21,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:21,568 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-07-22 16:02:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760972885] [2022-07-22 16:02:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:21,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:21,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117726573] [2022-07-22 16:02:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:02:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:21,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:21,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:02:21,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:02:21,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 16:02:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-22 16:02:21,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 16:02:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760972885] [2022-07-22 16:02:22,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:22,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117726573] [2022-07-22 16:02:22,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117726573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:02:22,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:02:22,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-07-22 16:02:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647899527] [2022-07-22 16:02:22,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:22,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:02:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:02:22,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:02:22,105 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 16:02:25,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:02:27,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:02:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:28,479 INFO L93 Difference]: Finished difference Result 236 states and 350 transitions. [2022-07-22 16:02:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 16:02:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 76 [2022-07-22 16:02:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:28,481 INFO L225 Difference]: With dead ends: 236 [2022-07-22 16:02:28,481 INFO L226 Difference]: Without dead ends: 234 [2022-07-22 16:02:28,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:02:28,482 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:28,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 237 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 496 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-07-22 16:02:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-22 16:02:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2022-07-22 16:02:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 97 states have call successors, (97), 10 states have call predecessors, (97), 10 states have return successors, (96), 94 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-22 16:02:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 339 transitions. [2022-07-22 16:02:28,562 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 339 transitions. Word has length 76 [2022-07-22 16:02:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:28,563 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 339 transitions. [2022-07-22 16:02:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 16:02:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 339 transitions. [2022-07-22 16:02:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 16:02:28,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:28,564 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:28,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:28,779 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,SelfDestructingSolverStorable8 [2022-07-22 16:02:28,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-07-22 16:02:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:28,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744345348] [2022-07-22 16:02:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:28,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:28,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:28,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543180267] [2022-07-22 16:02:28,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:02:28,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:28,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:28,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:28,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:02:28,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 16:02:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 16:02:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-07-22 16:02:29,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:29,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744345348] [2022-07-22 16:02:29,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:29,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543180267] [2022-07-22 16:02:29,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543180267] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:29,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:29,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-22 16:02:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010110171] [2022-07-22 16:02:29,649 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 16:02:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 16:02:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-07-22 16:02:29,650 INFO L87 Difference]: Start difference. First operand 225 states and 339 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-22 16:02:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:30,349 INFO L93 Difference]: Finished difference Result 241 states and 352 transitions. [2022-07-22 16:02:30,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 16:02:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-07-22 16:02:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:30,356 INFO L225 Difference]: With dead ends: 241 [2022-07-22 16:02:30,356 INFO L226 Difference]: Without dead ends: 239 [2022-07-22 16:02:30,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:02:30,358 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:30,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 149 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 16:02:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-22 16:02:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2022-07-22 16:02:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 129 states have internal predecessors, (155), 97 states have call successors, (97), 13 states have call predecessors, (97), 13 states have return successors, (96), 94 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-22 16:02:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 348 transitions. [2022-07-22 16:02:30,396 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 348 transitions. Word has length 81 [2022-07-22 16:02:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:30,397 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 348 transitions. [2022-07-22 16:02:30,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-22 16:02:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 348 transitions. [2022-07-22 16:02:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 16:02:30,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:30,398 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:30,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 16:02:30,632 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:30,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-07-22 16:02:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673192584] [2022-07-22 16:02:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:30,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:30,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:30,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277668818] [2022-07-22 16:02:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:30,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:30,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:30,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:02:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 16:02:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-22 16:02:30,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673192584] [2022-07-22 16:02:31,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277668818] [2022-07-22 16:02:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277668818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:31,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-22 16:02:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647373113] [2022-07-22 16:02:31,171 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 16:02:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 16:02:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-07-22 16:02:31,172 INFO L87 Difference]: Start difference. First operand 237 states and 348 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-22 16:02:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:31,530 INFO L93 Difference]: Finished difference Result 280 states and 403 transitions. [2022-07-22 16:02:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:02:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2022-07-22 16:02:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:31,532 INFO L225 Difference]: With dead ends: 280 [2022-07-22 16:02:31,532 INFO L226 Difference]: Without dead ends: 273 [2022-07-22 16:02:31,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:02:31,535 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:31,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 244 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 16:02:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-22 16:02:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2022-07-22 16:02:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 144 states have (on average 1.2222222222222223) internal successors, (176), 147 states have internal predecessors, (176), 109 states have call successors, (109), 16 states have call predecessors, (109), 16 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2022-07-22 16:02:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 393 transitions. [2022-07-22 16:02:31,572 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 393 transitions. Word has length 87 [2022-07-22 16:02:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:31,572 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 393 transitions. [2022-07-22 16:02:31,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-22 16:02:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 393 transitions. [2022-07-22 16:02:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 16:02:31,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:31,574 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:31,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 16:02:31,793 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,SelfDestructingSolverStorable10 [2022-07-22 16:02:31,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-07-22 16:02:31,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:31,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982824676] [2022-07-22 16:02:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:31,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:31,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120651354] [2022-07-22 16:02:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:31,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:31,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:31,822 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:31,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:02:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:31,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 16:02:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-22 16:02:32,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:36,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982824676] [2022-07-22 16:02:36,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120651354] [2022-07-22 16:02:36,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120651354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:36,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:36,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-22 16:02:36,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939006070] [2022-07-22 16:02:36,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:36,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 16:02:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 16:02:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-07-22 16:02:36,575 INFO L87 Difference]: Start difference. First operand 270 states and 393 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-22 16:02:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:37,062 INFO L93 Difference]: Finished difference Result 279 states and 401 transitions. [2022-07-22 16:02:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 16:02:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 103 [2022-07-22 16:02:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:37,064 INFO L225 Difference]: With dead ends: 279 [2022-07-22 16:02:37,064 INFO L226 Difference]: Without dead ends: 277 [2022-07-22 16:02:37,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-07-22 16:02:37,065 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:37,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 217 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:02:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-22 16:02:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2022-07-22 16:02:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 147 states have (on average 1.217687074829932) internal successors, (179), 150 states have internal predecessors, (179), 109 states have call successors, (109), 17 states have call predecessors, (109), 17 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2022-07-22 16:02:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 396 transitions. [2022-07-22 16:02:37,093 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 396 transitions. Word has length 103 [2022-07-22 16:02:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:37,094 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 396 transitions. [2022-07-22 16:02:37,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-07-22 16:02:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 396 transitions. [2022-07-22 16:02:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 16:02:37,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:37,095 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:37,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:37,312 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,SelfDestructingSolverStorable11 [2022-07-22 16:02:37,312 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2022-07-22 16:02:37,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:37,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801347451] [2022-07-22 16:02:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:37,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:37,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:37,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13760254] [2022-07-22 16:02:37,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:02:37,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:37,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:37,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:37,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 16:02:37,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:02:37,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 16:02:37,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-22 16:02:37,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:02:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801347451] [2022-07-22 16:02:37,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13760254] [2022-07-22 16:02:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13760254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:02:37,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:02:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:02:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353081036] [2022-07-22 16:02:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:02:37,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:02:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:02:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:02:37,406 INFO L87 Difference]: Start difference. First operand 274 states and 396 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-22 16:02:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:37,469 INFO L93 Difference]: Finished difference Result 346 states and 495 transitions. [2022-07-22 16:02:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:02:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2022-07-22 16:02:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:37,470 INFO L225 Difference]: With dead ends: 346 [2022-07-22 16:02:37,471 INFO L226 Difference]: Without dead ends: 185 [2022-07-22 16:02:37,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:02:37,474 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:37,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 145 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:02:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-22 16:02:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2022-07-22 16:02:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 99 states have (on average 1.121212121212121) internal successors, (111), 100 states have internal predecessors, (111), 59 states have call successors, (59), 17 states have call predecessors, (59), 17 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-22 16:02:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 228 transitions. [2022-07-22 16:02:37,491 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 228 transitions. Word has length 106 [2022-07-22 16:02:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:37,491 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 228 transitions. [2022-07-22 16:02:37,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-22 16:02:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 228 transitions. [2022-07-22 16:02:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 16:02:37,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:37,492 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:37,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:37,703 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,SelfDestructingSolverStorable12 [2022-07-22 16:02:37,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash -200374723, now seen corresponding path program 2 times [2022-07-22 16:02:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979026223] [2022-07-22 16:02:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:37,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:37,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153306620] [2022-07-22 16:02:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:02:37,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:37,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:37,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 16:02:37,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:02:37,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 16:02:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 47 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-22 16:02:38,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:38,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979026223] [2022-07-22 16:02:38,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153306620] [2022-07-22 16:02:38,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153306620] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:38,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:38,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-22 16:02:38,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148164094] [2022-07-22 16:02:38,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:38,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:02:38,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:02:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-22 16:02:38,421 INFO L87 Difference]: Start difference. First operand 176 states and 228 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-22 16:02:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:39,047 INFO L93 Difference]: Finished difference Result 214 states and 278 transitions. [2022-07-22 16:02:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:02:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 109 [2022-07-22 16:02:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:39,049 INFO L225 Difference]: With dead ends: 214 [2022-07-22 16:02:39,049 INFO L226 Difference]: Without dead ends: 207 [2022-07-22 16:02:39,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:02:39,049 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:39,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 250 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:02:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-22 16:02:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2022-07-22 16:02:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 115 states have internal predecessors, (128), 71 states have call successors, (71), 19 states have call predecessors, (71), 19 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-07-22 16:02:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 269 transitions. [2022-07-22 16:02:39,069 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 269 transitions. Word has length 109 [2022-07-22 16:02:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:39,070 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 269 transitions. [2022-07-22 16:02:39,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-22 16:02:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 269 transitions. [2022-07-22 16:02:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 16:02:39,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:39,071 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:39,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 16:02:39,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1760442774, now seen corresponding path program 3 times [2022-07-22 16:02:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836607884] [2022-07-22 16:02:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:39,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:39,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394334959] [2022-07-22 16:02:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:02:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:39,298 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:39,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 16:02:39,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 16:02:39,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:39,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:02:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-07-22 16:02:39,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-07-22 16:02:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:39,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836607884] [2022-07-22 16:02:39,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:39,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394334959] [2022-07-22 16:02:39,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394334959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:02:39,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:02:39,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-22 16:02:39,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189669547] [2022-07-22 16:02:39,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 16:02:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 16:02:39,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:02:39,442 INFO L87 Difference]: Start difference. First operand 205 states and 269 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-22 16:02:39,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:39,657 INFO L93 Difference]: Finished difference Result 314 states and 452 transitions. [2022-07-22 16:02:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:02:39,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 112 [2022-07-22 16:02:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:39,671 INFO L225 Difference]: With dead ends: 314 [2022-07-22 16:02:39,671 INFO L226 Difference]: Without dead ends: 307 [2022-07-22 16:02:39,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:02:39,672 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 14 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:39,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 253 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:02:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-22 16:02:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 250. [2022-07-22 16:02:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 136 states have internal predecessors, (155), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-22 16:02:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 344 transitions. [2022-07-22 16:02:39,699 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 344 transitions. Word has length 112 [2022-07-22 16:02:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:39,700 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 344 transitions. [2022-07-22 16:02:39,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-22 16:02:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 344 transitions. [2022-07-22 16:02:39,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-22 16:02:39,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:39,701 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:39,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:39,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:39,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2022-07-22 16:02:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:39,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872294055] [2022-07-22 16:02:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:39,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:39,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946067322] [2022-07-22 16:02:39,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:02:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:39,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:39,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 16:02:40,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:02:40,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 16:02:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 123 proven. 50 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-07-22 16:02:40,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 127 proven. 32 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-07-22 16:02:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872294055] [2022-07-22 16:02:42,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:42,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946067322] [2022-07-22 16:02:42,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946067322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:02:42,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:02:42,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-22 16:02:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143436527] [2022-07-22 16:02:42,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:42,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 16:02:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 16:02:42,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:02:42,659 INFO L87 Difference]: Start difference. First operand 250 states and 344 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-22 16:02:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:46,781 INFO L93 Difference]: Finished difference Result 270 states and 364 transitions. [2022-07-22 16:02:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 16:02:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) Word has length 125 [2022-07-22 16:02:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:46,791 INFO L225 Difference]: With dead ends: 270 [2022-07-22 16:02:46,791 INFO L226 Difference]: Without dead ends: 268 [2022-07-22 16:02:46,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 227 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2022-07-22 16:02:46,791 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 54 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:46,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 260 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 16:02:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-22 16:02:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 258. [2022-07-22 16:02:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 141 states have (on average 1.1418439716312057) internal successors, (161), 142 states have internal predecessors, (161), 95 states have call successors, (95), 21 states have call predecessors, (95), 21 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-22 16:02:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 350 transitions. [2022-07-22 16:02:46,831 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 350 transitions. Word has length 125 [2022-07-22 16:02:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:46,832 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 350 transitions. [2022-07-22 16:02:46,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 12 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-22 16:02:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 350 transitions. [2022-07-22 16:02:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 16:02:46,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:46,833 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:46,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:47,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 16:02:47,050 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash 649793148, now seen corresponding path program 4 times [2022-07-22 16:02:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:47,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183562531] [2022-07-22 16:02:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:47,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:47,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121541372] [2022-07-22 16:02:47,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:02:47,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:47,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:47,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 16:02:47,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:02:47,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-22 16:02:47,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 93 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 16:02:47,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:48,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183562531] [2022-07-22 16:02:48,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121541372] [2022-07-22 16:02:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121541372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:48,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:48,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-22 16:02:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034695103] [2022-07-22 16:02:48,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:48,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 16:02:48,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 16:02:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:02:48,187 INFO L87 Difference]: Start difference. First operand 258 states and 350 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-22 16:02:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:49,264 INFO L93 Difference]: Finished difference Result 303 states and 412 transitions. [2022-07-22 16:02:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 16:02:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) Word has length 131 [2022-07-22 16:02:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:49,266 INFO L225 Difference]: With dead ends: 303 [2022-07-22 16:02:49,266 INFO L226 Difference]: Without dead ends: 296 [2022-07-22 16:02:49,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:02:49,267 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 33 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:49,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 258 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:02:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-22 16:02:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 264. [2022-07-22 16:02:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 144 states have internal predecessors, (164), 99 states have call successors, (99), 21 states have call predecessors, (99), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-22 16:02:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 361 transitions. [2022-07-22 16:02:49,309 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 361 transitions. Word has length 131 [2022-07-22 16:02:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:49,310 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 361 transitions. [2022-07-22 16:02:49,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 7 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-22 16:02:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 361 transitions. [2022-07-22 16:02:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 16:02:49,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:49,311 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:49,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 16:02:49,526 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 5 times [2022-07-22 16:02:49,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:49,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967337447] [2022-07-22 16:02:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:49,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:49,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101163595] [2022-07-22 16:02:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:02:49,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:49,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:49,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:49,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 16:02:49,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 16:02:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-22 16:02:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 80 proven. 175 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-07-22 16:02:50,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967337447] [2022-07-22 16:02:50,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101163595] [2022-07-22 16:02:50,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101163595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:50,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:50,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-22 16:02:50,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26387783] [2022-07-22 16:02:50,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:50,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 16:02:50,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 16:02:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:02:50,802 INFO L87 Difference]: Start difference. First operand 264 states and 361 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 16:02:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:52,041 INFO L93 Difference]: Finished difference Result 313 states and 426 transitions. [2022-07-22 16:02:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:02:52,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2022-07-22 16:02:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:52,044 INFO L225 Difference]: With dead ends: 313 [2022-07-22 16:02:52,044 INFO L226 Difference]: Without dead ends: 306 [2022-07-22 16:02:52,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-07-22 16:02:52,045 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:52,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 311 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 16:02:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-22 16:02:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2022-07-22 16:02:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 163 states have (on average 1.147239263803681) internal successors, (187), 164 states have internal predecessors, (187), 115 states have call successors, (115), 24 states have call predecessors, (115), 24 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2022-07-22 16:02:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 416 transitions. [2022-07-22 16:02:52,167 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 416 transitions. Word has length 134 [2022-07-22 16:02:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:52,168 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 416 transitions. [2022-07-22 16:02:52,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-22 16:02:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 416 transitions. [2022-07-22 16:02:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 16:02:52,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:52,170 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:52,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:52,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 16:02:52,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1419250666, now seen corresponding path program 3 times [2022-07-22 16:02:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49016047] [2022-07-22 16:02:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:52,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:52,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:52,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172711320] [2022-07-22 16:02:52,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:02:52,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:52,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:52,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:52,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 16:02:52,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 16:02:52,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-22 16:02:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 86 proven. 69 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-22 16:02:53,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:54,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49016047] [2022-07-22 16:02:54,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172711320] [2022-07-22 16:02:54,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172711320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:54,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:54,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-22 16:02:54,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816565304] [2022-07-22 16:02:54,325 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:54,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:02:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:02:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-07-22 16:02:54,326 INFO L87 Difference]: Start difference. First operand 303 states and 416 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-22 16:02:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:55,215 INFO L93 Difference]: Finished difference Result 399 states and 548 transitions. [2022-07-22 16:02:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 16:02:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 145 [2022-07-22 16:02:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:55,218 INFO L225 Difference]: With dead ends: 399 [2022-07-22 16:02:55,218 INFO L226 Difference]: Without dead ends: 397 [2022-07-22 16:02:55,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 16:02:55,219 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 46 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:55,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 258 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:02:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-07-22 16:02:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 391. [2022-07-22 16:02:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 208 states have (on average 1.1490384615384615) internal successors, (239), 209 states have internal predecessors, (239), 151 states have call successors, (151), 31 states have call predecessors, (151), 31 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2022-07-22 16:02:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 540 transitions. [2022-07-22 16:02:55,305 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 540 transitions. Word has length 145 [2022-07-22 16:02:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:55,306 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 540 transitions. [2022-07-22 16:02:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-22 16:02:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 540 transitions. [2022-07-22 16:02:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-22 16:02:55,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:55,308 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:55,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:55,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:55,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 6 times [2022-07-22 16:02:55,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:55,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920425079] [2022-07-22 16:02:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:55,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:55,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200921427] [2022-07-22 16:02:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:02:55,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:55,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:55,537 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:55,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 16:02:55,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 16:02:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:02:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 16:02:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 77 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-07-22 16:02:56,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:02:56,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:02:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920425079] [2022-07-22 16:02:56,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:02:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200921427] [2022-07-22 16:02:56,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200921427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:02:56,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:02:56,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-22 16:02:56,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765215567] [2022-07-22 16:02:56,221 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:02:56,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:02:56,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:02:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:02:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:02:56,222 INFO L87 Difference]: Start difference. First operand 391 states and 540 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-22 16:02:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:02:56,506 INFO L93 Difference]: Finished difference Result 415 states and 559 transitions. [2022-07-22 16:02:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 16:02:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 153 [2022-07-22 16:02:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:02:56,511 INFO L225 Difference]: With dead ends: 415 [2022-07-22 16:02:56,511 INFO L226 Difference]: Without dead ends: 408 [2022-07-22 16:02:56,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:02:56,512 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:02:56,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 173 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:02:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-07-22 16:02:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 362. [2022-07-22 16:02:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 198 states have (on average 1.1313131313131313) internal successors, (224), 199 states have internal predecessors, (224), 131 states have call successors, (131), 32 states have call predecessors, (131), 32 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2022-07-22 16:02:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 485 transitions. [2022-07-22 16:02:56,580 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 485 transitions. Word has length 153 [2022-07-22 16:02:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:02:56,580 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 485 transitions. [2022-07-22 16:02:56,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-22 16:02:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 485 transitions. [2022-07-22 16:02:56,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 16:02:56,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:02:56,581 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:02:56,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 16:02:56,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:56,793 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:02:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:02:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 7 times [2022-07-22 16:02:56,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:02:56,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002551363] [2022-07-22 16:02:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:02:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:02:56,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:02:56,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183042252] [2022-07-22 16:02:56,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 16:02:56,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:02:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:02:56,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:02:56,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 16:02:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:02:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-22 16:02:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:02:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 176 proven. 171 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2022-07-22 16:02:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:03:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 134 proven. 81 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2022-07-22 16:03:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:03:03,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002551363] [2022-07-22 16:03:03,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:03:03,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183042252] [2022-07-22 16:03:03,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183042252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:03:03,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:03:03,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-07-22 16:03:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794936153] [2022-07-22 16:03:03,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:03:03,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 16:03:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:03:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 16:03:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 16:03:03,773 INFO L87 Difference]: Start difference. First operand 362 states and 485 transitions. Second operand has 33 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 19 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (50), 16 states have call predecessors, (50), 17 states have call successors, (50) [2022-07-22 16:03:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:03:48,898 INFO L93 Difference]: Finished difference Result 426 states and 570 transitions. [2022-07-22 16:03:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 16:03:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 19 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (50), 16 states have call predecessors, (50), 17 states have call successors, (50) Word has length 156 [2022-07-22 16:03:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:03:48,900 INFO L225 Difference]: With dead ends: 426 [2022-07-22 16:03:48,900 INFO L226 Difference]: Without dead ends: 418 [2022-07-22 16:03:48,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 276 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 16:03:48,901 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 142 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:03:48,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 317 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2022-07-22 16:03:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-22 16:03:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 333. [2022-07-22 16:03:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.0957446808510638) internal successors, (206), 188 states have internal predecessors, (206), 110 states have call successors, (110), 34 states have call predecessors, (110), 34 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-07-22 16:03:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 426 transitions. [2022-07-22 16:03:49,013 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 426 transitions. Word has length 156 [2022-07-22 16:03:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:03:49,013 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 426 transitions. [2022-07-22 16:03:49,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 19 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (50), 16 states have call predecessors, (50), 17 states have call successors, (50) [2022-07-22 16:03:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 426 transitions. [2022-07-22 16:03:49,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-22 16:03:49,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:03:49,015 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:03:49,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 16:03:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 16:03:49,227 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:03:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:03:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2114909687, now seen corresponding path program 4 times [2022-07-22 16:03:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:03:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996824016] [2022-07-22 16:03:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:03:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:03:49,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:03:49,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609574974] [2022-07-22 16:03:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:03:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:03:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:03:49,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:03:49,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 16:03:49,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:03:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:03:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-22 16:03:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:03:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 196 proven. 151 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-07-22 16:03:50,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:03:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 202 proven. 41 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2022-07-22 16:03:51,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:03:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996824016] [2022-07-22 16:03:51,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:03:51,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609574974] [2022-07-22 16:03:51,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609574974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:03:51,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:03:51,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2022-07-22 16:03:51,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193619285] [2022-07-22 16:03:51,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:03:51,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 16:03:51,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:03:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 16:03:51,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:03:51,131 INFO L87 Difference]: Start difference. First operand 333 states and 426 transitions. Second operand has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 16 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (48), 16 states have call predecessors, (48), 14 states have call successors, (48) [2022-07-22 16:03:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:03:56,332 INFO L93 Difference]: Finished difference Result 381 states and 482 transitions. [2022-07-22 16:03:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 16:03:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 16 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (48), 16 states have call predecessors, (48), 14 states have call successors, (48) Word has length 167 [2022-07-22 16:03:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:03:56,333 INFO L225 Difference]: With dead ends: 381 [2022-07-22 16:03:56,333 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 16:03:56,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 305 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 16:03:56,335 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 57 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:03:56,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 314 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 16:03:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 16:03:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 16:03:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:03:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 16:03:56,335 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 167 [2022-07-22 16:03:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:03:56,336 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 16:03:56,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 16 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (48), 16 states have call predecessors, (48), 14 states have call successors, (48) [2022-07-22 16:03:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 16:03:56,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 16:03:56,338 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 16:03:56,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 16:03:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 16:03:56,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 16:04:59,734 WARN L233 SmtUtils]: Spent 59.39s on a formula simplification. DAG size of input: 389 DAG size of output: 64 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-07-22 16:05:20,735 WARN L233 SmtUtils]: Spent 21.00s on a formula simplification. DAG size of input: 274 DAG size of output: 73 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-07-22 16:06:16,090 WARN L233 SmtUtils]: Spent 55.35s on a formula simplification. DAG size of input: 394 DAG size of output: 67 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)