./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/ps4-ll_valuebound100.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 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 05:24:08,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 05:24:08,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 05:24:08,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 05:24:08,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 05:24:08,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 05:24:08,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 05:24:08,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 05:24:08,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 05:24:08,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 05:24:08,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 05:24:08,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 05:24:08,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 05:24:08,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 05:24:08,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 05:24:08,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 05:24:08,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 05:24:08,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 05:24:08,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 05:24:08,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 05:24:08,090 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 05:24:08,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 05:24:08,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 05:24:08,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 05:24:08,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 05:24:08,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 05:24:08,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 05:24:08,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 05:24:08,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 05:24:08,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 05:24:08,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 05:24:08,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 05:24:08,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 05:24:08,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 05:24:08,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 05:24:08,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 05:24:08,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 05:24:08,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 05:24:08,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 05:24:08,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 05:24:08,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 05:24:08,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 05:24:08,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 05:24:08,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 05:24:08,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 05:24:08,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 05:24:08,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 05:24:08,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 05:24:08,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 05:24:08,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 05:24:08,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 05:24:08,143 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 05:24:08,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 05:24:08,144 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 05:24:08,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 05:24:08,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 05:24:08,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 05:24:08,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 05:24:08,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 05:24:08,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 05:24:08,146 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 05:24:08,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 05:24:08,147 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 05:24:08,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 05:24:08,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 05:24:08,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 05:24:08,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 05:24:08,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 05:24:08,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 05:24:08,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 05:24:08,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 05:24:08,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 05:24:08,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 05:24:08,149 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 05:24:08,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 05:24:08,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 05:24:08,150 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2022-07-12 05:24:08,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 05:24:08,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 05:24:08,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 05:24:08,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 05:24:08,411 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 05:24:08,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-07-12 05:24:08,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83d19e3d/0ae02dd753724823a6d8159b4569dd46/FLAG04f72250d [2022-07-12 05:24:08,889 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 05:24:08,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-07-12 05:24:08,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83d19e3d/0ae02dd753724823a6d8159b4569dd46/FLAG04f72250d [2022-07-12 05:24:09,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f83d19e3d/0ae02dd753724823a6d8159b4569dd46 [2022-07-12 05:24:09,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 05:24:09,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 05:24:09,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 05:24:09,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 05:24:09,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 05:24:09,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733a5959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09, skipping insertion in model container [2022-07-12 05:24:09,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 05:24:09,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 05:24:09,451 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/ps4-ll_valuebound100.c[458,471] [2022-07-12 05:24:09,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 05:24:09,469 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 05:24:09,478 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/ps4-ll_valuebound100.c[458,471] [2022-07-12 05:24:09,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 05:24:09,493 INFO L208 MainTranslator]: Completed translation [2022-07-12 05:24:09,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09 WrapperNode [2022-07-12 05:24:09,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 05:24:09,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 05:24:09,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 05:24:09,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 05:24:09,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,523 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-07-12 05:24:09,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 05:24:09,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 05:24:09,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 05:24:09,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 05:24:09,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 05:24:09,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 05:24:09,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 05:24:09,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 05:24:09,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (1/1) ... [2022-07-12 05:24:09,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 05:24:09,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:09,572 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) [2022-07-12 05:24:09,576 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 [2022-07-12 05:24:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 05:24:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 05:24:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 05:24:09,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 05:24:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 05:24:09,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 05:24:09,652 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 05:24:09,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 05:24:09,796 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 05:24:09,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 05:24:09,801 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 05:24:09,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 05:24:09 BoogieIcfgContainer [2022-07-12 05:24:09,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 05:24:09,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 05:24:09,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 05:24:09,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 05:24:09,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 05:24:09" (1/3) ... [2022-07-12 05:24:09,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e46e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 05:24:09, skipping insertion in model container [2022-07-12 05:24:09,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:24:09" (2/3) ... [2022-07-12 05:24:09,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e46e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 05:24:09, skipping insertion in model container [2022-07-12 05:24:09,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 05:24:09" (3/3) ... [2022-07-12 05:24:09,812 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2022-07-12 05:24:09,827 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 05:24:09,828 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 05:24:09,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 05:24:09,895 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@348cbbba, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2345a710 [2022-07-12 05:24:09,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 05:24:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 05:24:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 05:24:09,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:09,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:09,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2022-07-12 05:24:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:09,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342069537] [2022-07-12 05:24:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:24:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342069537] [2022-07-12 05:24:10,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342069537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:24:10,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:24:10,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 05:24:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102462449] [2022-07-12 05:24:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:24:10,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 05:24:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 05:24:10,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 05:24:10,090 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 05:24:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:10,107 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-07-12 05:24:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 05:24:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-12 05:24:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:10,122 INFO L225 Difference]: With dead ends: 35 [2022-07-12 05:24:10,122 INFO L226 Difference]: Without dead ends: 15 [2022-07-12 05:24:10,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 05:24:10,135 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2022-07-12 05:24:10,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 05:24:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-12 05:24:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-12 05:24:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 05:24:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-12 05:24:10,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-07-12 05:24:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:10,167 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-12 05:24:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 05:24:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-12 05:24:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 05:24:10,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:10,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 05:24:10,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2022-07-12 05:24:10,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:10,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696883777] [2022-07-12 05:24:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:10,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:10,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202406915] [2022-07-12 05:24:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:10,207 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) [2022-07-12 05:24:10,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 05:24:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 05:24:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:24:10,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 05:24:10,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696883777] [2022-07-12 05:24:10,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:10,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202406915] [2022-07-12 05:24:10,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202406915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:24:10,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:24:10,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 05:24:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895250869] [2022-07-12 05:24:10,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:24:10,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 05:24:10,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 05:24:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 05:24:10,359 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 05:24:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:10,414 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-07-12 05:24:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 05:24:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-12 05:24:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:10,415 INFO L225 Difference]: With dead ends: 26 [2022-07-12 05:24:10,416 INFO L226 Difference]: Without dead ends: 22 [2022-07-12 05:24:10,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 05:24:10,417 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:10,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 05:24:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-12 05:24:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-12 05:24:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 05:24:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-12 05:24:10,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2022-07-12 05:24:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:10,424 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-12 05:24:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 05:24:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-12 05:24:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 05:24:10,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:10,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:10,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:10,630 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 [2022-07-12 05:24:10,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2022-07-12 05:24:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013425537] [2022-07-12 05:24:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:10,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:10,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:10,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848657823] [2022-07-12 05:24:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:10,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:10,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:10,648 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) [2022-07-12 05:24:10,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 05:24:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 05:24:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:24:10,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 05:24:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013425537] [2022-07-12 05:24:11,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848657823] [2022-07-12 05:24:11,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848657823] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:11,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:11,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-12 05:24:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829342128] [2022-07-12 05:24:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:24:11,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 05:24:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 05:24:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 05:24:11,095 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 05:24:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:11,140 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-12 05:24:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 05:24:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-12 05:24:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:11,141 INFO L225 Difference]: With dead ends: 28 [2022-07-12 05:24:11,142 INFO L226 Difference]: Without dead ends: 23 [2022-07-12 05:24:11,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 05:24:11,143 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:11,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 05:24:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-12 05:24:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-12 05:24:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 05:24:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-07-12 05:24:11,150 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2022-07-12 05:24:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:11,151 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-07-12 05:24:11,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 05:24:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-07-12 05:24:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 05:24:11,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:11,153 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:11,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:11,363 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 [2022-07-12 05:24:11,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2022-07-12 05:24:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:11,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813013920] [2022-07-12 05:24:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:11,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:11,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259603736] [2022-07-12 05:24:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:11,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:11,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:11,377 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) [2022-07-12 05:24:11,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 05:24:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 05:24:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 05:24:11,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813013920] [2022-07-12 05:24:11,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259603736] [2022-07-12 05:24:11,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259603736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:11,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:11,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-12 05:24:11,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629020448] [2022-07-12 05:24:11,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:11,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 05:24:11,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:11,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 05:24:11,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-12 05:24:11,684 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 05:24:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:11,768 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-07-12 05:24:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 05:24:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-07-12 05:24:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:11,771 INFO L225 Difference]: With dead ends: 31 [2022-07-12 05:24:11,771 INFO L226 Difference]: Without dead ends: 26 [2022-07-12 05:24:11,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-12 05:24:11,775 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:11,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 05:24:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-12 05:24:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-12 05:24:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 05:24:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-07-12 05:24:11,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-07-12 05:24:11,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:11,788 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-07-12 05:24:11,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 05:24:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-07-12 05:24:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 05:24:11,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:11,792 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:11,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:12,011 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 [2022-07-12 05:24:12,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2022-07-12 05:24:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41798992] [2022-07-12 05:24:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:12,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418859659] [2022-07-12 05:24:12,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:24:12,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:12,023 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) [2022-07-12 05:24:12,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 05:24:12,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:24:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 05:24:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 05:24:12,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:12,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41798992] [2022-07-12 05:24:12,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:12,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418859659] [2022-07-12 05:24:12,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418859659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:12,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:12,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-12 05:24:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438304252] [2022-07-12 05:24:12,382 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 05:24:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 05:24:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 05:24:12,383 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 05:24:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:12,484 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-12 05:24:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 05:24:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-07-12 05:24:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:12,487 INFO L225 Difference]: With dead ends: 34 [2022-07-12 05:24:12,487 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 05:24:12,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-12 05:24:12,488 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:12,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 05:24:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 05:24:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-12 05:24:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 05:24:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-12 05:24:12,496 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-07-12 05:24:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:12,497 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-12 05:24:12,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 05:24:12,497 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-12 05:24:12,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 05:24:12,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:12,499 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:12,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:12,719 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 [2022-07-12 05:24:12,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2022-07-12 05:24:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210571971] [2022-07-12 05:24:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:12,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:12,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808273324] [2022-07-12 05:24:12,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:24:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:12,730 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) [2022-07-12 05:24:12,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 05:24:12,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 05:24:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 05:24:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 05:24:13,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:17,341 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| (- 2))) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2022-07-12 05:24:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:17,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210571971] [2022-07-12 05:24:17,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:17,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808273324] [2022-07-12 05:24:17,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808273324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:17,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:17,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 05:24:17,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401619896] [2022-07-12 05:24:17,357 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:17,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 05:24:17,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:17,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 05:24:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2022-07-12 05:24:17,358 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 05:24:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:17,592 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-07-12 05:24:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 05:24:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-12 05:24:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:17,594 INFO L225 Difference]: With dead ends: 41 [2022-07-12 05:24:17,595 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 05:24:17,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=79, Invalid=344, Unknown=1, NotChecked=38, Total=462 [2022-07-12 05:24:17,596 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:17,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 101 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 05:24:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 05:24:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-12 05:24:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 05:24:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-12 05:24:17,604 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2022-07-12 05:24:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:17,604 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-12 05:24:17,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 05:24:17,604 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-12 05:24:17,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 05:24:17,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:17,605 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:17,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 05:24:17,805 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 [2022-07-12 05:24:17,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2022-07-12 05:24:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:17,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699114115] [2022-07-12 05:24:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:17,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:17,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418019299] [2022-07-12 05:24:17,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:24:17,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:17,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:17,819 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) [2022-07-12 05:24:17,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 05:24:17,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:24:17,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 05:24:17,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 05:24:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699114115] [2022-07-12 05:24:18,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418019299] [2022-07-12 05:24:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418019299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:18,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:18,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-12 05:24:18,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392950651] [2022-07-12 05:24:18,149 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:18,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 05:24:18,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 05:24:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-12 05:24:18,150 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 05:24:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:18,294 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-07-12 05:24:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 05:24:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2022-07-12 05:24:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:18,295 INFO L225 Difference]: With dead ends: 44 [2022-07-12 05:24:18,295 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 05:24:18,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-12 05:24:18,296 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:18,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 05:24:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 05:24:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-12 05:24:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 05:24:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-07-12 05:24:18,306 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 43 [2022-07-12 05:24:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:18,306 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-07-12 05:24:18,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 05:24:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-07-12 05:24:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 05:24:18,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:18,308 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:18,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:18,527 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 [2022-07-12 05:24:18,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2022-07-12 05:24:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439089615] [2022-07-12 05:24:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:18,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:18,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735358989] [2022-07-12 05:24:18,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:24:18,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:18,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:18,553 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) [2022-07-12 05:24:18,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 05:24:18,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 05:24:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 05:24:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 05:24:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:19,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439089615] [2022-07-12 05:24:19,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735358989] [2022-07-12 05:24:19,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735358989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:19,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:19,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-12 05:24:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153860713] [2022-07-12 05:24:19,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 05:24:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 05:24:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-12 05:24:19,155 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 05:24:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:19,312 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-07-12 05:24:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 05:24:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-07-12 05:24:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:19,313 INFO L225 Difference]: With dead ends: 47 [2022-07-12 05:24:19,313 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 05:24:19,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-07-12 05:24:19,314 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:19,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 161 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 05:24:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 05:24:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-12 05:24:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 05:24:19,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-12 05:24:19,322 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 50 [2022-07-12 05:24:19,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:19,322 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-12 05:24:19,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 05:24:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-12 05:24:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 05:24:19,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:19,324 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:19,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:19,545 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 [2022-07-12 05:24:19,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2022-07-12 05:24:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:19,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763220331] [2022-07-12 05:24:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:19,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:19,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573632816] [2022-07-12 05:24:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:24:19,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:19,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:19,557 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) [2022-07-12 05:24:19,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 05:24:19,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 05:24:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 05:24:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-12 05:24:19,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:19,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763220331] [2022-07-12 05:24:19,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:19,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573632816] [2022-07-12 05:24:19,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573632816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:19,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:19,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-12 05:24:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318311520] [2022-07-12 05:24:19,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:19,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 05:24:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 05:24:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-12 05:24:19,887 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 05:24:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:20,070 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-07-12 05:24:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 05:24:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2022-07-12 05:24:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:20,071 INFO L225 Difference]: With dead ends: 50 [2022-07-12 05:24:20,071 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 05:24:20,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-12 05:24:20,072 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:20,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 189 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 05:24:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 05:24:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 05:24:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 05:24:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-12 05:24:20,079 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 57 [2022-07-12 05:24:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:20,079 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-12 05:24:20,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 05:24:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-12 05:24:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 05:24:20,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:20,080 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:20,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:20,280 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 [2022-07-12 05:24:20,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2022-07-12 05:24:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:20,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063809386] [2022-07-12 05:24:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:20,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:20,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069289945] [2022-07-12 05:24:20,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 05:24:20,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:20,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:20,296 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) [2022-07-12 05:24:20,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 05:24:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 05:24:20,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 05:24:20,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063809386] [2022-07-12 05:24:20,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069289945] [2022-07-12 05:24:20,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069289945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:20,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:20,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-12 05:24:20,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994409426] [2022-07-12 05:24:20,833 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 05:24:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 05:24:20,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-12 05:24:20,834 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 05:24:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:21,059 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-12 05:24:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 05:24:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2022-07-12 05:24:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:21,060 INFO L225 Difference]: With dead ends: 53 [2022-07-12 05:24:21,060 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 05:24:21,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-12 05:24:21,061 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:21,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 219 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 05:24:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 05:24:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-12 05:24:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 05:24:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-12 05:24:21,068 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 64 [2022-07-12 05:24:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:21,069 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-12 05:24:21,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 05:24:21,069 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-12 05:24:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 05:24:21,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:21,070 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:21,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:21,270 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 [2022-07-12 05:24:21,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:21,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2022-07-12 05:24:21,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:21,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321394492] [2022-07-12 05:24:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:21,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:21,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:21,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936699887] [2022-07-12 05:24:21,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:24:21,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:21,280 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) [2022-07-12 05:24:21,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 05:24:21,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:24:21,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:21,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 05:24:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-12 05:24:21,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:22,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321394492] [2022-07-12 05:24:22,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936699887] [2022-07-12 05:24:22,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936699887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:22,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:22,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-12 05:24:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308083237] [2022-07-12 05:24:22,088 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:22,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 05:24:22,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 05:24:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-12 05:24:22,089 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 05:24:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:22,341 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-07-12 05:24:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 05:24:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2022-07-12 05:24:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:22,343 INFO L225 Difference]: With dead ends: 56 [2022-07-12 05:24:22,343 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 05:24:22,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-12 05:24:22,344 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:22,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 251 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 05:24:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 05:24:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-12 05:24:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 05:24:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-12 05:24:22,352 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 71 [2022-07-12 05:24:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:22,352 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-12 05:24:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-12 05:24:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-12 05:24:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 05:24:22,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:22,353 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:22,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:22,560 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 [2022-07-12 05:24:22,560 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2022-07-12 05:24:22,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:22,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185014087] [2022-07-12 05:24:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:22,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:22,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:22,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949636316] [2022-07-12 05:24:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:24:22,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:22,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:22,571 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) [2022-07-12 05:24:22,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 05:24:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-12 05:24:22,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 05:24:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-12 05:24:23,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185014087] [2022-07-12 05:24:23,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949636316] [2022-07-12 05:24:23,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949636316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:23,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-12 05:24:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120106746] [2022-07-12 05:24:23,513 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:23,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 05:24:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 05:24:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-12 05:24:23,514 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 05:24:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:23,790 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-07-12 05:24:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 05:24:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2022-07-12 05:24:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:23,795 INFO L225 Difference]: With dead ends: 59 [2022-07-12 05:24:23,795 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 05:24:23,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-12 05:24:23,796 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:23,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 05:24:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 05:24:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-12 05:24:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 05:24:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-12 05:24:23,804 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 78 [2022-07-12 05:24:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:23,805 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-12 05:24:23,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 05:24:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-12 05:24:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 05:24:23,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:23,806 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:23,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:24,012 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 [2022-07-12 05:24:24,013 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:24,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2022-07-12 05:24:24,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:24,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662713076] [2022-07-12 05:24:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:24,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:24,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:24,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416362429] [2022-07-12 05:24:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:24:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:24,023 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) [2022-07-12 05:24:24,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 05:24:24,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:24:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 05:24:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-12 05:24:24,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:24,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662713076] [2022-07-12 05:24:24,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416362429] [2022-07-12 05:24:24,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416362429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:24,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:24,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-12 05:24:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861189631] [2022-07-12 05:24:24,787 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 05:24:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 05:24:24,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-12 05:24:24,789 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 05:24:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:25,085 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-12 05:24:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 05:24:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2022-07-12 05:24:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:25,086 INFO L225 Difference]: With dead ends: 62 [2022-07-12 05:24:25,086 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 05:24:25,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-12 05:24:25,087 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:25,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 05:24:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 05:24:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-12 05:24:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 05:24:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-07-12 05:24:25,095 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 85 [2022-07-12 05:24:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:25,095 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-07-12 05:24:25,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 05:24:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-07-12 05:24:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 05:24:25,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:25,096 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:25,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:25,302 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 [2022-07-12 05:24:25,302 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:25,303 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2022-07-12 05:24:25,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:25,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189930365] [2022-07-12 05:24:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:25,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:25,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:25,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131006683] [2022-07-12 05:24:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:24:25,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:25,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:25,312 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) [2022-07-12 05:24:25,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 05:24:26,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 05:24:26,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 05:24:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-12 05:24:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189930365] [2022-07-12 05:24:27,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131006683] [2022-07-12 05:24:27,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131006683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:27,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:27,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-12 05:24:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686261077] [2022-07-12 05:24:27,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 05:24:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 05:24:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-12 05:24:27,255 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 05:24:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:27,651 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-07-12 05:24:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 05:24:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2022-07-12 05:24:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:27,653 INFO L225 Difference]: With dead ends: 65 [2022-07-12 05:24:27,653 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 05:24:27,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-12 05:24:27,654 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:27,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 359 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 05:24:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 05:24:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 05:24:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 05:24:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-12 05:24:27,662 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 92 [2022-07-12 05:24:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:27,662 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-12 05:24:27,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 05:24:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-12 05:24:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-12 05:24:27,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:27,663 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:27,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:27,871 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 [2022-07-12 05:24:27,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 12 times [2022-07-12 05:24:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:27,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691832690] [2022-07-12 05:24:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:27,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:27,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395206629] [2022-07-12 05:24:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:24:27,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:27,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:27,888 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) [2022-07-12 05:24:27,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 05:24:28,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 05:24:28,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-12 05:24:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-12 05:24:28,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:28,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691832690] [2022-07-12 05:24:28,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:28,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395206629] [2022-07-12 05:24:28,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395206629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:28,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:28,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-12 05:24:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816250393] [2022-07-12 05:24:28,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 05:24:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 05:24:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-12 05:24:28,686 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 05:24:29,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:29,096 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-07-12 05:24:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 05:24:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 99 [2022-07-12 05:24:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:29,097 INFO L225 Difference]: With dead ends: 68 [2022-07-12 05:24:29,097 INFO L226 Difference]: Without dead ends: 63 [2022-07-12 05:24:29,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-12 05:24:29,098 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:29,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 399 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 05:24:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-12 05:24:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-12 05:24:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 05:24:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-12 05:24:29,105 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 99 [2022-07-12 05:24:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:29,106 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-12 05:24:29,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-12 05:24:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-12 05:24:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-12 05:24:29,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:29,107 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:29,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:29,312 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 [2022-07-12 05:24:29,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 13 times [2022-07-12 05:24:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:29,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847772197] [2022-07-12 05:24:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:29,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:29,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453754253] [2022-07-12 05:24:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 05:24:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:29,329 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) [2022-07-12 05:24:29,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 05:24:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-12 05:24:30,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-12 05:24:30,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:30,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847772197] [2022-07-12 05:24:30,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453754253] [2022-07-12 05:24:30,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453754253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:30,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:30,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-12 05:24:30,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156405315] [2022-07-12 05:24:30,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:30,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 05:24:30,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:30,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 05:24:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-07-12 05:24:30,969 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 05:24:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:31,429 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-12 05:24:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 05:24:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 106 [2022-07-12 05:24:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:31,430 INFO L225 Difference]: With dead ends: 71 [2022-07-12 05:24:31,431 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 05:24:31,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-07-12 05:24:31,431 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:31,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 441 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 05:24:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 05:24:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-12 05:24:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-12 05:24:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-07-12 05:24:31,440 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 106 [2022-07-12 05:24:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:31,440 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-07-12 05:24:31,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 05:24:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-07-12 05:24:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-12 05:24:31,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:31,442 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:31,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:31,648 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 [2022-07-12 05:24:31,648 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 14 times [2022-07-12 05:24:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:31,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396429967] [2022-07-12 05:24:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:31,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:31,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:31,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610985160] [2022-07-12 05:24:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:24:31,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:31,668 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) [2022-07-12 05:24:31,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 05:24:32,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:24:32,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 05:24:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-12 05:24:33,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:33,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:33,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396429967] [2022-07-12 05:24:33,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:33,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610985160] [2022-07-12 05:24:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610985160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:33,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:33,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-12 05:24:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433115217] [2022-07-12 05:24:33,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 05:24:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 05:24:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-12 05:24:33,295 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-12 05:24:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:33,752 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-07-12 05:24:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 05:24:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 113 [2022-07-12 05:24:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:33,753 INFO L225 Difference]: With dead ends: 74 [2022-07-12 05:24:33,754 INFO L226 Difference]: Without dead ends: 69 [2022-07-12 05:24:33,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-12 05:24:33,754 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:33,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 485 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 05:24:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-12 05:24:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-12 05:24:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 05:24:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-07-12 05:24:33,763 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 113 [2022-07-12 05:24:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:33,763 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-07-12 05:24:33,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-12 05:24:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-07-12 05:24:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-12 05:24:33,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:33,764 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:33,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:33,964 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 [2022-07-12 05:24:33,965 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 15 times [2022-07-12 05:24:33,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:33,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212223565] [2022-07-12 05:24:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:33,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:33,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:33,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913756912] [2022-07-12 05:24:33,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:24:33,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:33,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:33,974 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) [2022-07-12 05:24:33,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 05:24:34,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-12 05:24:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-12 05:24:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-12 05:24:34,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:34,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212223565] [2022-07-12 05:24:34,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:34,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913756912] [2022-07-12 05:24:34,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913756912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:34,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:34,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-12 05:24:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058746723] [2022-07-12 05:24:34,808 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:34,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 05:24:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 05:24:34,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-07-12 05:24:34,809 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 05:24:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:35,339 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-07-12 05:24:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 05:24:35,340 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 120 [2022-07-12 05:24:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:35,341 INFO L225 Difference]: With dead ends: 77 [2022-07-12 05:24:35,341 INFO L226 Difference]: Without dead ends: 72 [2022-07-12 05:24:35,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-07-12 05:24:35,341 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:35,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 05:24:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-12 05:24:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-12 05:24:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-12 05:24:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-07-12 05:24:35,348 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 120 [2022-07-12 05:24:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:35,349 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-07-12 05:24:35,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-12 05:24:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-07-12 05:24:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-12 05:24:35,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:35,350 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:35,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:35,550 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 [2022-07-12 05:24:35,550 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:35,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 16 times [2022-07-12 05:24:35,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:35,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482126995] [2022-07-12 05:24:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:35,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:35,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:35,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433087611] [2022-07-12 05:24:35,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:24:35,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:35,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:35,559 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) [2022-07-12 05:24:35,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 05:24:36,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:24:36,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-12 05:24:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-12 05:24:37,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:37,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:37,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482126995] [2022-07-12 05:24:37,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:37,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433087611] [2022-07-12 05:24:37,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433087611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:37,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:37,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-12 05:24:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668843349] [2022-07-12 05:24:37,193 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 05:24:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 05:24:37,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-07-12 05:24:37,195 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-12 05:24:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:37,771 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-07-12 05:24:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 05:24:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 127 [2022-07-12 05:24:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:37,772 INFO L225 Difference]: With dead ends: 80 [2022-07-12 05:24:37,772 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 05:24:37,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-07-12 05:24:37,773 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:37,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 579 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 05:24:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 05:24:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-12 05:24:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 05:24:37,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-07-12 05:24:37,781 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 127 [2022-07-12 05:24:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:37,782 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-07-12 05:24:37,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-12 05:24:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-07-12 05:24:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-12 05:24:37,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:37,784 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:37,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:37,984 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 [2022-07-12 05:24:37,984 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash 146925304, now seen corresponding path program 17 times [2022-07-12 05:24:37,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:37,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729548848] [2022-07-12 05:24:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:37,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:37,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:37,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22846793] [2022-07-12 05:24:37,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:24:37,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:37,997 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) [2022-07-12 05:24:37,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 05:24:39,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-12 05:24:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 05:24:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-12 05:24:39,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:39,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729548848] [2022-07-12 05:24:39,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22846793] [2022-07-12 05:24:39,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22846793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:39,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:39,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-12 05:24:39,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146022134] [2022-07-12 05:24:39,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:39,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 05:24:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 05:24:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-12 05:24:39,953 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 05:24:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:40,607 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-07-12 05:24:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 05:24:40,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 134 [2022-07-12 05:24:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:40,611 INFO L225 Difference]: With dead ends: 83 [2022-07-12 05:24:40,611 INFO L226 Difference]: Without dead ends: 78 [2022-07-12 05:24:40,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-07-12 05:24:40,611 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:40,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 05:24:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-12 05:24:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-12 05:24:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-12 05:24:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-07-12 05:24:40,620 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 134 [2022-07-12 05:24:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:40,620 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-07-12 05:24:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 05:24:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-07-12 05:24:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-12 05:24:40,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:40,622 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:40,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:40,829 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 [2022-07-12 05:24:40,829 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:40,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1332278625, now seen corresponding path program 18 times [2022-07-12 05:24:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:40,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435803343] [2022-07-12 05:24:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:40,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:40,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969680080] [2022-07-12 05:24:40,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:24:40,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:40,838 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) [2022-07-12 05:24:40,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 05:24:42,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-12 05:24:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 05:24:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-07-12 05:24:42,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435803343] [2022-07-12 05:24:42,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969680080] [2022-07-12 05:24:42,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969680080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:42,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:42,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-12 05:24:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411591087] [2022-07-12 05:24:42,637 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:42,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 05:24:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 05:24:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-07-12 05:24:42,638 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-12 05:24:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:43,312 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-07-12 05:24:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 05:24:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 141 [2022-07-12 05:24:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:43,313 INFO L225 Difference]: With dead ends: 86 [2022-07-12 05:24:43,313 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 05:24:43,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-12 05:24:43,314 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:43,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 681 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 05:24:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 05:24:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-12 05:24:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 05:24:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-07-12 05:24:43,327 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 141 [2022-07-12 05:24:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:43,327 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-07-12 05:24:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-12 05:24:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-07-12 05:24:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-12 05:24:43,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:43,330 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:43,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:43,537 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 [2022-07-12 05:24:43,538 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:43,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2058456792, now seen corresponding path program 19 times [2022-07-12 05:24:43,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:43,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099014394] [2022-07-12 05:24:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:43,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:43,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:43,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154175012] [2022-07-12 05:24:43,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 05:24:43,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:43,547 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) [2022-07-12 05:24:43,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 05:24:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:24:44,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-12 05:24:44,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-12 05:24:45,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:45,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099014394] [2022-07-12 05:24:45,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:45,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154175012] [2022-07-12 05:24:45,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154175012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:45,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:45,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-12 05:24:45,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236528942] [2022-07-12 05:24:45,214 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:45,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 05:24:45,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 05:24:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-12 05:24:45,215 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 05:24:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:45,904 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-07-12 05:24:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 05:24:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 148 [2022-07-12 05:24:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:45,907 INFO L225 Difference]: With dead ends: 89 [2022-07-12 05:24:45,907 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 05:24:45,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-07-12 05:24:45,908 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:45,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 05:24:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 05:24:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-12 05:24:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-12 05:24:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-07-12 05:24:45,916 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 148 [2022-07-12 05:24:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:45,916 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-07-12 05:24:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-12 05:24:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-07-12 05:24:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-12 05:24:45,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:45,918 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:45,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:46,125 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 [2022-07-12 05:24:46,125 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:46,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1810280833, now seen corresponding path program 20 times [2022-07-12 05:24:46,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:46,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37733079] [2022-07-12 05:24:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:46,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:46,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:46,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511774623] [2022-07-12 05:24:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:24:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:46,140 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:24:46,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 05:24:46,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:24:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-12 05:24:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-07-12 05:24:47,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:47,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37733079] [2022-07-12 05:24:47,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511774623] [2022-07-12 05:24:47,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511774623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:47,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:47,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-07-12 05:24:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518491893] [2022-07-12 05:24:47,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 05:24:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 05:24:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-07-12 05:24:47,502 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-12 05:24:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:48,239 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-12 05:24:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 05:24:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 155 [2022-07-12 05:24:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:48,240 INFO L225 Difference]: With dead ends: 92 [2022-07-12 05:24:48,240 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 05:24:48,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-07-12 05:24:48,241 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:48,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 05:24:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 05:24:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-12 05:24:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 05:24:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-07-12 05:24:48,250 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 155 [2022-07-12 05:24:48,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:48,250 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-07-12 05:24:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-12 05:24:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-07-12 05:24:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-12 05:24:48,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:48,252 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:48,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 05:24:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:48,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 548269752, now seen corresponding path program 21 times [2022-07-12 05:24:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:48,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431691039] [2022-07-12 05:24:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:48,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:48,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:48,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789928228] [2022-07-12 05:24:48,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:24:48,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:48,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:48,468 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:24:48,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 05:24:49,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-12 05:24:49,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:49,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-12 05:24:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-12 05:24:49,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:49,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431691039] [2022-07-12 05:24:49,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789928228] [2022-07-12 05:24:49,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789928228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:49,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:49,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-07-12 05:24:49,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572326578] [2022-07-12 05:24:49,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:49,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 05:24:49,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:49,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 05:24:49,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-07-12 05:24:49,828 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 05:24:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:50,647 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-12 05:24:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 05:24:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 162 [2022-07-12 05:24:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:50,648 INFO L225 Difference]: With dead ends: 95 [2022-07-12 05:24:50,648 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 05:24:50,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-07-12 05:24:50,649 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:50,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 849 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 05:24:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 05:24:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-12 05:24:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 24 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 05:24:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-07-12 05:24:50,659 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 162 [2022-07-12 05:24:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:50,659 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-07-12 05:24:50,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 05:24:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-07-12 05:24:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-12 05:24:50,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:50,661 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:50,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 05:24:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:50,868 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash -954681951, now seen corresponding path program 22 times [2022-07-12 05:24:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184881093] [2022-07-12 05:24:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:50,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:50,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:50,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542073495] [2022-07-12 05:24:50,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:24:50,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:50,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:50,890 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:24:50,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 05:24:51,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:24:51,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:24:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-12 05:24:51,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:24:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-07-12 05:24:51,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:24:52,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:24:52,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184881093] [2022-07-12 05:24:52,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:24:52,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542073495] [2022-07-12 05:24:52,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542073495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:24:52,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:24:52,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-12 05:24:52,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970585146] [2022-07-12 05:24:52,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:24:52,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 05:24:52,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:24:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 05:24:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-07-12 05:24:52,282 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 05:24:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:24:53,180 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-07-12 05:24:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 05:24:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 169 [2022-07-12 05:24:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:24:53,182 INFO L225 Difference]: With dead ends: 98 [2022-07-12 05:24:53,182 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 05:24:53,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 05:24:53,183 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 05:24:53,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 05:24:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 05:24:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-12 05:24:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 05:24:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-07-12 05:24:53,193 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 169 [2022-07-12 05:24:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:24:53,194 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-07-12 05:24:53,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 05:24:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-07-12 05:24:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-12 05:24:53,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:24:53,195 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:24:53,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-12 05:24:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 05:24:53,396 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:24:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:24:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1441462632, now seen corresponding path program 23 times [2022-07-12 05:24:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:24:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326024573] [2022-07-12 05:24:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:24:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:24:53,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:24:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999108964] [2022-07-12 05:24:53,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:24:53,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:24:53,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:24:53,405 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:24:53,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 05:26:59,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-12 05:26:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:26:59,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-12 05:26:59,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:26:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-12 05:26:59,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:26:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:26:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326024573] [2022-07-12 05:26:59,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:26:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999108964] [2022-07-12 05:26:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999108964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:26:59,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:26:59,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-07-12 05:26:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869664094] [2022-07-12 05:26:59,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:26:59,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 05:26:59,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:26:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 05:26:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-07-12 05:26:59,860 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 05:27:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:00,808 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2022-07-12 05:27:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 05:27:00,809 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 176 [2022-07-12 05:27:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:00,810 INFO L225 Difference]: With dead ends: 101 [2022-07-12 05:27:00,810 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 05:27:00,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 05:27:00,810 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 971 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 05:27:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 05:27:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-12 05:27:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-12 05:27:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-07-12 05:27:00,818 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 176 [2022-07-12 05:27:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:00,819 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-07-12 05:27:00,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 05:27:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-07-12 05:27:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-12 05:27:00,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:00,820 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:00,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-12 05:27:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 05:27:01,034 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1273037249, now seen corresponding path program 24 times [2022-07-12 05:27:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:01,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448715193] [2022-07-12 05:27:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:01,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:01,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639496947] [2022-07-12 05:27:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:27:01,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:01,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:01,043 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:01,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 05:27:02,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-12 05:27:02,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-12 05:27:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-07-12 05:27:02,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:04,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448715193] [2022-07-12 05:27:04,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639496947] [2022-07-12 05:27:04,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639496947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:04,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:04,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-07-12 05:27:04,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420558383] [2022-07-12 05:27:04,888 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:04,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 05:27:04,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:04,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 05:27:04,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 05:27:04,890 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-12 05:27:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:05,993 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-07-12 05:27:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 05:27:05,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 183 [2022-07-12 05:27:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:05,995 INFO L225 Difference]: With dead ends: 104 [2022-07-12 05:27:05,995 INFO L226 Difference]: Without dead ends: 99 [2022-07-12 05:27:05,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=702, Invalid=2604, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 05:27:05,997 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 2 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:05,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1035 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 05:27:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-12 05:27:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-12 05:27:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 27 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-12 05:27:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2022-07-12 05:27:06,015 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 183 [2022-07-12 05:27:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:06,015 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2022-07-12 05:27:06,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-12 05:27:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2022-07-12 05:27:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-12 05:27:06,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:06,017 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:06,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 05:27:06,227 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1983588744, now seen corresponding path program 25 times [2022-07-12 05:27:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139837452] [2022-07-12 05:27:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:06,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:06,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307782883] [2022-07-12 05:27:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 05:27:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:06,243 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:06,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 05:27:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:27:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-12 05:27:06,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-07-12 05:27:07,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:07,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139837452] [2022-07-12 05:27:07,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307782883] [2022-07-12 05:27:07,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307782883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:07,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:07,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-07-12 05:27:07,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833460890] [2022-07-12 05:27:07,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:07,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 05:27:07,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 05:27:07,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 05:27:07,722 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-12 05:27:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:08,800 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2022-07-12 05:27:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 05:27:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 190 [2022-07-12 05:27:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:08,801 INFO L225 Difference]: With dead ends: 107 [2022-07-12 05:27:08,801 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 05:27:08,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 05:27:08,802 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:08,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1101 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 05:27:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 05:27:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-12 05:27:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 28 states have call successors, (28), 4 states have call predecessors, (28), 3 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-12 05:27:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-07-12 05:27:08,814 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 190 [2022-07-12 05:27:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:08,814 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-07-12 05:27:08,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-12 05:27:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-07-12 05:27:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-12 05:27:08,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:08,816 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:08,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:09,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 05:27:09,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash 832673249, now seen corresponding path program 26 times [2022-07-12 05:27:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:09,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961911383] [2022-07-12 05:27:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:09,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:09,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112638752] [2022-07-12 05:27:09,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:27:09,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:09,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:09,035 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:09,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 05:27:09,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:27:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-12 05:27:09,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-07-12 05:27:10,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:10,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961911383] [2022-07-12 05:27:10,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112638752] [2022-07-12 05:27:10,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112638752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:10,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:10,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-07-12 05:27:10,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40266289] [2022-07-12 05:27:10,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:10,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 05:27:10,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 05:27:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 05:27:10,741 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-12 05:27:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:11,858 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-07-12 05:27:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 05:27:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 197 [2022-07-12 05:27:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:11,859 INFO L225 Difference]: With dead ends: 110 [2022-07-12 05:27:11,859 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 05:27:11,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 05:27:11,860 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:11,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1169 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 05:27:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 05:27:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-12 05:27:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 29 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-12 05:27:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 130 transitions. [2022-07-12 05:27:11,871 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 130 transitions. Word has length 197 [2022-07-12 05:27:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:11,871 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 130 transitions. [2022-07-12 05:27:11,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-12 05:27:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 130 transitions. [2022-07-12 05:27:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-12 05:27:11,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:11,873 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:11,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:12,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 05:27:12,082 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash -702849448, now seen corresponding path program 27 times [2022-07-12 05:27:12,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:12,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999391786] [2022-07-12 05:27:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:12,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:12,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611900895] [2022-07-12 05:27:12,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:27:12,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:12,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:12,091 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:12,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 05:27:15,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-12 05:27:15,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:15,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-12 05:27:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-07-12 05:27:16,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:16,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999391786] [2022-07-12 05:27:16,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:16,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611900895] [2022-07-12 05:27:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611900895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:16,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-12 05:27:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263001695] [2022-07-12 05:27:16,873 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:16,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 05:27:16,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 05:27:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 05:27:16,874 INFO L87 Difference]: Start difference. First operand 105 states and 130 transitions. Second operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-12 05:27:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:18,072 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2022-07-12 05:27:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 05:27:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 204 [2022-07-12 05:27:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:18,074 INFO L225 Difference]: With dead ends: 113 [2022-07-12 05:27:18,074 INFO L226 Difference]: Without dead ends: 108 [2022-07-12 05:27:18,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 05:27:18,076 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1239 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 05:27:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-12 05:27:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-12 05:27:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 30 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 05:27:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2022-07-12 05:27:18,088 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 204 [2022-07-12 05:27:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:18,089 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2022-07-12 05:27:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-12 05:27:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2022-07-12 05:27:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-12 05:27:18,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:18,090 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:18,301 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:18,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash 473723393, now seen corresponding path program 28 times [2022-07-12 05:27:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122389982] [2022-07-12 05:27:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:18,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:18,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375462381] [2022-07-12 05:27:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:27:18,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:18,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:18,315 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:18,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 05:27:18,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:27:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:18,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-12 05:27:18,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-07-12 05:27:19,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:19,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122389982] [2022-07-12 05:27:19,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375462381] [2022-07-12 05:27:19,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375462381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:19,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:19,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-07-12 05:27:19,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659061320] [2022-07-12 05:27:19,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:19,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 05:27:19,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 05:27:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 05:27:19,723 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 05:27:20,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:20,997 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-07-12 05:27:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 05:27:20,998 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 211 [2022-07-12 05:27:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:20,999 INFO L225 Difference]: With dead ends: 116 [2022-07-12 05:27:20,999 INFO L226 Difference]: Without dead ends: 111 [2022-07-12 05:27:20,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 05:27:21,000 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:21,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1311 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 05:27:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-12 05:27:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-12 05:27:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 31 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-12 05:27:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2022-07-12 05:27:21,016 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 211 [2022-07-12 05:27:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:21,016 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2022-07-12 05:27:21,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 05:27:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2022-07-12 05:27:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-12 05:27:21,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:21,018 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:21,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 05:27:21,226 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash 687251000, now seen corresponding path program 29 times [2022-07-12 05:27:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:21,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65960718] [2022-07-12 05:27:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:21,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205984764] [2022-07-12 05:27:21,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:27:21,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:21,236 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:21,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 05:27:27,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-07-12 05:27:27,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-12 05:27:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-07-12 05:27:27,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:28,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65960718] [2022-07-12 05:27:28,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205984764] [2022-07-12 05:27:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205984764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:28,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-07-12 05:27:28,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507884426] [2022-07-12 05:27:28,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 05:27:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 05:27:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 05:27:28,109 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-12 05:27:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:29,447 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-07-12 05:27:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-12 05:27:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 218 [2022-07-12 05:27:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:29,449 INFO L225 Difference]: With dead ends: 119 [2022-07-12 05:27:29,449 INFO L226 Difference]: Without dead ends: 114 [2022-07-12 05:27:29,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 05:27:29,450 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1385 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 05:27:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-12 05:27:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-12 05:27:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 32 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 05:27:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-07-12 05:27:29,459 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 218 [2022-07-12 05:27:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:29,459 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-07-12 05:27:29,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-12 05:27:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-07-12 05:27:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-12 05:27:29,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:29,460 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:29,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-12 05:27:29,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:29,661 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916577, now seen corresponding path program 30 times [2022-07-12 05:27:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:29,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721503432] [2022-07-12 05:27:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:29,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:29,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378325342] [2022-07-12 05:27:29,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:27:29,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:29,671 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:29,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 05:27:44,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-07-12 05:27:44,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-12 05:27:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-07-12 05:27:45,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721503432] [2022-07-12 05:27:45,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378325342] [2022-07-12 05:27:45,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378325342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:45,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:45,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-12 05:27:45,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111092839] [2022-07-12 05:27:45,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:45,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 05:27:45,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:45,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 05:27:45,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 05:27:45,726 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 05:27:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:47,148 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2022-07-12 05:27:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 05:27:47,148 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 225 [2022-07-12 05:27:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:47,149 INFO L225 Difference]: With dead ends: 122 [2022-07-12 05:27:47,149 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 05:27:47,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 05:27:47,150 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 2 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:47,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1461 Invalid, 3239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 05:27:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 05:27:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-12 05:27:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 33 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-12 05:27:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2022-07-12 05:27:47,163 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 225 [2022-07-12 05:27:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:47,163 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2022-07-12 05:27:47,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-12 05:27:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2022-07-12 05:27:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-12 05:27:47,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:47,165 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:47,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-12 05:27:47,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:47,371 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2142541336, now seen corresponding path program 31 times [2022-07-12 05:27:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908169144] [2022-07-12 05:27:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:47,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:47,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522869360] [2022-07-12 05:27:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 05:27:47,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:47,380 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 05:27:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:27:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-12 05:27:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-07-12 05:27:49,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908169144] [2022-07-12 05:27:49,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522869360] [2022-07-12 05:27:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522869360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:49,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:49,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-07-12 05:27:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352305937] [2022-07-12 05:27:49,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:49,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 05:27:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 05:27:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 05:27:49,218 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-12 05:27:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:50,717 INFO L93 Difference]: Finished difference Result 125 states and 155 transitions. [2022-07-12 05:27:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 05:27:50,718 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 232 [2022-07-12 05:27:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:50,719 INFO L225 Difference]: With dead ends: 125 [2022-07-12 05:27:50,719 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 05:27:50,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 05:27:50,719 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 2 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:50,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1539 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-12 05:27:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 05:27:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-12 05:27:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 34 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 05:27:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2022-07-12 05:27:50,729 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 232 [2022-07-12 05:27:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:50,729 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2022-07-12 05:27:50,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-12 05:27:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2022-07-12 05:27:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-12 05:27:50,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:50,731 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:50,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:50,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 05:27:50,931 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1846084161, now seen corresponding path program 32 times [2022-07-12 05:27:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:50,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822459300] [2022-07-12 05:27:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:50,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:50,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:50,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416007405] [2022-07-12 05:27:50,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:27:50,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:50,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:50,941 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:50,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 05:27:51,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:27:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-12 05:27:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-07-12 05:27:52,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:52,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822459300] [2022-07-12 05:27:52,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416007405] [2022-07-12 05:27:52,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416007405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:52,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:52,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-07-12 05:27:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925596504] [2022-07-12 05:27:52,971 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:52,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 05:27:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 05:27:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 05:27:52,973 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 05:27:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:54,646 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-07-12 05:27:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 05:27:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 239 [2022-07-12 05:27:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:54,647 INFO L225 Difference]: With dead ends: 128 [2022-07-12 05:27:54,647 INFO L226 Difference]: Without dead ends: 123 [2022-07-12 05:27:54,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 05:27:54,648 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 3645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:54,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1619 Invalid, 3645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3645 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 05:27:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-12 05:27:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-07-12 05:27:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 35 states have call successors, (35), 4 states have call predecessors, (35), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 05:27:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2022-07-12 05:27:54,665 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 239 [2022-07-12 05:27:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:54,665 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2022-07-12 05:27:54,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-12 05:27:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2022-07-12 05:27:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-12 05:27:54,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:54,667 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:54,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:54,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-12 05:27:54,875 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 456345080, now seen corresponding path program 33 times [2022-07-12 05:27:54,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395477737] [2022-07-12 05:27:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:54,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549869607] [2022-07-12 05:27:54,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:27:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:54,885 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:54,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 05:27:56,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-07-12 05:27:56,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:27:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-12 05:27:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:27:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-07-12 05:27:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:27:57,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:27:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395477737] [2022-07-12 05:27:57,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:27:57,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549869607] [2022-07-12 05:27:57,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549869607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:27:57,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:27:57,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-07-12 05:27:57,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209836066] [2022-07-12 05:27:57,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:27:57,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 05:27:57,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:27:57,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 05:27:57,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 05:27:57,461 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 05:27:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:27:59,369 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-07-12 05:27:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 05:27:59,370 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 246 [2022-07-12 05:27:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:27:59,371 INFO L225 Difference]: With dead ends: 131 [2022-07-12 05:27:59,371 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 05:27:59,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 05:27:59,372 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 3857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 05:27:59,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1701 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3857 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 05:27:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 05:27:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-12 05:27:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 36 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 05:27:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-07-12 05:27:59,387 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 246 [2022-07-12 05:27:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:27:59,387 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-07-12 05:27:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 05:27:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-07-12 05:27:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-12 05:27:59,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:27:59,389 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:27:59,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 05:27:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-12 05:27:59,598 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:27:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:27:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1535030881, now seen corresponding path program 34 times [2022-07-12 05:27:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:27:59,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584003082] [2022-07-12 05:27:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:27:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:27:59,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:27:59,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300754075] [2022-07-12 05:27:59,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:27:59,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:27:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:27:59,608 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:27:59,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 05:28:01,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:28:01,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:28:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-12 05:28:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:28:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-07-12 05:28:01,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:28:02,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:28:02,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584003082] [2022-07-12 05:28:02,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:28:02,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300754075] [2022-07-12 05:28:02,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300754075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:28:02,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:28:02,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-12 05:28:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331857126] [2022-07-12 05:28:02,162 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:28:02,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 05:28:02,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:28:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 05:28:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 05:28:02,164 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 05:28:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:28:03,958 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-07-12 05:28:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 05:28:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 253 [2022-07-12 05:28:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:28:03,960 INFO L225 Difference]: With dead ends: 134 [2022-07-12 05:28:03,960 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 05:28:03,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 05:28:03,961 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 4075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 05:28:03,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1785 Invalid, 4075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 05:28:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 05:28:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-12 05:28:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 37 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 05:28:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2022-07-12 05:28:03,972 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 253 [2022-07-12 05:28:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:28:03,972 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2022-07-12 05:28:03,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 05:28:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2022-07-12 05:28:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-12 05:28:03,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:28:03,974 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:28:03,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-12 05:28:04,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:28:04,175 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:28:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:28:04,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1607511512, now seen corresponding path program 35 times [2022-07-12 05:28:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:28:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80413468] [2022-07-12 05:28:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:28:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:28:04,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:28:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968684902] [2022-07-12 05:28:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:28:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:28:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:28:04,185 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:28:04,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 05:28:31,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-07-12 05:28:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:28:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 148 conjunts are in the unsatisfiable core [2022-07-12 05:28:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:28:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-07-12 05:28:32,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:28:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:28:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80413468] [2022-07-12 05:28:32,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:28:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968684902] [2022-07-12 05:28:32,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968684902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 05:28:32,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:28:32,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-07-12 05:28:32,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129623895] [2022-07-12 05:28:32,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 05:28:32,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 05:28:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:28:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 05:28:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 05:28:32,788 INFO L87 Difference]: Start difference. First operand 129 states and 162 transitions. Second operand has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 05:28:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:28:34,673 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2022-07-12 05:28:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 05:28:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 260 [2022-07-12 05:28:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:28:34,675 INFO L225 Difference]: With dead ends: 137 [2022-07-12 05:28:34,675 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 05:28:34,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 05:28:34,675 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 05:28:34,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1871 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 05:28:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 05:28:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-12 05:28:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 38 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-12 05:28:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2022-07-12 05:28:34,691 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 260 [2022-07-12 05:28:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:28:34,691 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2022-07-12 05:28:34,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-12 05:28:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2022-07-12 05:28:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-07-12 05:28:34,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:28:34,692 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:28:34,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-12 05:28:34,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 05:28:34,893 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:28:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:28:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1705594239, now seen corresponding path program 36 times [2022-07-12 05:28:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:28:34,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374327832] [2022-07-12 05:28:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:28:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:28:34,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:28:34,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987646370] [2022-07-12 05:28:34,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:28:34,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:28:34,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:28:34,902 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 05:28:34,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process