./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 eb692b52 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-?-eb692b5 [2022-07-19 16:31:56,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 16:31:56,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 16:31:56,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 16:31:56,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 16:31:56,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 16:31:56,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 16:31:56,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 16:31:56,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 16:31:56,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 16:31:56,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 16:31:56,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 16:31:56,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 16:31:56,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 16:31:56,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 16:31:56,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 16:31:56,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 16:31:56,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 16:31:56,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 16:31:56,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 16:31:56,107 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 16:31:56,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 16:31:56,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 16:31:56,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 16:31:56,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 16:31:56,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 16:31:56,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 16:31:56,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 16:31:56,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 16:31:56,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 16:31:56,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 16:31:56,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 16:31:56,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 16:31:56,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 16:31:56,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 16:31:56,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 16:31:56,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 16:31:56,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 16:31:56,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 16:31:56,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 16:31:56,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 16:31:56,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 16:31:56,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 16:31:56,163 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 16:31:56,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 16:31:56,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 16:31:56,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 16:31:56,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 16:31:56,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 16:31:56,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 16:31:56,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 16:31:56,165 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 16:31:56,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 16:31:56,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 16:31:56,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 16:31:56,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 16:31:56,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 16:31:56,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 16:31:56,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 16:31:56,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 16:31:56,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 16:31:56,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 16:31:56,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 16:31:56,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 16:31:56,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 16:31:56,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 16:31:56,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 16:31:56,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:31:56,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 16:31:56,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 16:31:56,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 16:31:56,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 16:31:56,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 16:31:56,170 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 16:31:56,170 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 16:31:56,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 16:31:56,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2022-07-19 16:31:56,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 16:31:56,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 16:31:56,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 16:31:56,400 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 16:31:56,400 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 16:31:56,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-07-19 16:31:56,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d64bde3/76e9c099a1434c53818a13aa4aa0dc85/FLAG57aeff87f [2022-07-19 16:31:56,820 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 16:31:56,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-07-19 16:31:56,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d64bde3/76e9c099a1434c53818a13aa4aa0dc85/FLAG57aeff87f [2022-07-19 16:31:57,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5d64bde3/76e9c099a1434c53818a13aa4aa0dc85 [2022-07-19 16:31:57,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 16:31:57,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 16:31:57,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 16:31:57,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 16:31:57,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 16:31:57,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c588677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57, skipping insertion in model container [2022-07-19 16:31:57,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 16:31:57,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 16:31:57,372 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] [2022-07-19 16:31:57,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:31:57,398 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 16:31:57,409 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] [2022-07-19 16:31:57,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:31:57,438 INFO L208 MainTranslator]: Completed translation [2022-07-19 16:31:57,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57 WrapperNode [2022-07-19 16:31:57,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 16:31:57,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 16:31:57,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 16:31:57,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 16:31:57,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,466 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-07-19 16:31:57,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 16:31:57,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 16:31:57,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 16:31:57,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 16:31:57,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 16:31:57,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 16:31:57,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 16:31:57,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 16:31:57,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (1/1) ... [2022-07-19 16:31:57,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:31:57,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:31:57,507 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) [2022-07-19 16:31:57,512 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 [2022-07-19 16:31:57,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 16:31:57,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 16:31:57,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 16:31:57,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 16:31:57,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 16:31:57,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 16:31:57,576 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 16:31:57,577 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 16:31:57,651 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 16:31:57,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 16:31:57,656 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 16:31:57,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:31:57 BoogieIcfgContainer [2022-07-19 16:31:57,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 16:31:57,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 16:31:57,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 16:31:57,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 16:31:57,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 04:31:57" (1/3) ... [2022-07-19 16:31:57,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22854963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:31:57, skipping insertion in model container [2022-07-19 16:31:57,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:31:57" (2/3) ... [2022-07-19 16:31:57,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22854963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:31:57, skipping insertion in model container [2022-07-19 16:31:57,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:31:57" (3/3) ... [2022-07-19 16:31:57,664 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2022-07-19 16:31:57,675 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 16:31:57,675 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 16:31:57,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 16:31:57,719 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@2e8eb55a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24ca5aed [2022-07-19 16:31:57,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 16:31:57,732 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) [2022-07-19 16:31:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 16:31:57,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:31:57,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:31:57,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:31:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:31:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2022-07-19 16:31:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:31:57,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856072922] [2022-07-19 16:31:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:57,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:31:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:31:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:31:57,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:31:57,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856072922] [2022-07-19 16:31:57,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856072922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:31:57,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:31:57,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 16:31:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516316005] [2022-07-19 16:31:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:31:57,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 16:31:57,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:31:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 16:31:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:31:57,921 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) [2022-07-19 16:31:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:31:57,937 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-07-19 16:31:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 16:31:57,939 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 [2022-07-19 16:31:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:31:57,955 INFO L225 Difference]: With dead ends: 35 [2022-07-19 16:31:57,956 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 16:31:57,959 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 [2022-07-19 16:31:57,964 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 [2022-07-19 16:31:57,965 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] [2022-07-19 16:31:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 16:31:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 16:31:58,002 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) [2022-07-19 16:31:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-19 16:31:58,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-07-19 16:31:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:31:58,005 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-19 16:31:58,005 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) [2022-07-19 16:31:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-19 16:31:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 16:31:58,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:31:58,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:31:58,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 16:31:58,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:31:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:31:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2022-07-19 16:31:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:31:58,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890305756] [2022-07-19 16:31:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:31:58,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:31:58,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686885682] [2022-07-19 16:31:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:58,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:31:58,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:31:58,047 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) [2022-07-19 16:31:58,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 16:31:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:31:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 16:31:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:31:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:31:58,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:31:58,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:31:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890305756] [2022-07-19 16:31:58,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:31:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686885682] [2022-07-19 16:31:58,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686885682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:31:58,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:31:58,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:31:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927116291] [2022-07-19 16:31:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:31:58,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:31:58,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:31:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:31:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:31:58,281 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) [2022-07-19 16:31:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:31:58,357 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-07-19 16:31:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:31:58,359 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 [2022-07-19 16:31:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:31:58,360 INFO L225 Difference]: With dead ends: 26 [2022-07-19 16:31:58,361 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 16:31:58,362 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 [2022-07-19 16:31:58,363 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:31:58,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:31:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 16:31:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-19 16:31:58,369 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) [2022-07-19 16:31:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-19 16:31:58,370 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2022-07-19 16:31:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:31:58,370 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-19 16:31:58,371 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) [2022-07-19 16:31:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-19 16:31:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 16:31:58,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:31:58,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:31:58,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 16:31:58,597 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 [2022-07-19 16:31:58,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:31:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:31:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2022-07-19 16:31:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:31:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10570070] [2022-07-19 16:31:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:31:58,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:31:58,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856824624] [2022-07-19 16:31:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:58,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:31:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:31:58,612 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) [2022-07-19 16:31:58,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 16:31:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:31:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 16:31:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:31:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:31:58,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:31:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 16:31:59,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:31:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10570070] [2022-07-19 16:31:59,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:31:59,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856824624] [2022-07-19 16:31:59,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856824624] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 16:31:59,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:31:59,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-19 16:31:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867736634] [2022-07-19 16:31:59,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:31:59,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:31:59,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:31:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:31:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:31:59,038 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) [2022-07-19 16:31:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:31:59,092 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-19 16:31:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:31:59,093 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 [2022-07-19 16:31:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:31:59,094 INFO L225 Difference]: With dead ends: 28 [2022-07-19 16:31:59,094 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 16:31:59,095 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 [2022-07-19 16:31:59,096 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 [2022-07-19 16:31:59,096 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] [2022-07-19 16:31:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 16:31:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 16:31:59,100 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) [2022-07-19 16:31:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-07-19 16:31:59,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2022-07-19 16:31:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:31:59,101 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-07-19 16:31:59,102 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) [2022-07-19 16:31:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-07-19 16:31:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 16:31:59,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:31:59,103 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:31:59,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 16:31:59,319 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 [2022-07-19 16:31:59,320 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:31:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:31:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2022-07-19 16:31:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:31:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322905368] [2022-07-19 16:31:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:59,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:31:59,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:31:59,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561513392] [2022-07-19 16:31:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:59,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:31:59,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:31:59,331 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) [2022-07-19 16:31:59,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 16:31:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:31:59,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 16:31:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:31:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 16:31:59,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:31:59,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:31:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322905368] [2022-07-19 16:31:59,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:31:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561513392] [2022-07-19 16:31:59,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561513392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:31:59,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:31:59,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-19 16:31:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027105731] [2022-07-19 16:31:59,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:31:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 16:31:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:31:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 16:31:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:31:59,704 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) [2022-07-19 16:31:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:31:59,775 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-07-19 16:31:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 16:31:59,776 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 [2022-07-19 16:31:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:31:59,777 INFO L225 Difference]: With dead ends: 31 [2022-07-19 16:31:59,777 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 16:31:59,778 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 [2022-07-19 16:31:59,778 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 [2022-07-19 16:31:59,779 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] [2022-07-19 16:31:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 16:31:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 16:31:59,784 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) [2022-07-19 16:31:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-07-19 16:31:59,785 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-07-19 16:31:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:31:59,785 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-07-19 16:31:59,785 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) [2022-07-19 16:31:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-07-19 16:31:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 16:31:59,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:31:59,786 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:31:59,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 16:31:59,991 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 [2022-07-19 16:31:59,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:31:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:31:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2022-07-19 16:31:59,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:31:59,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389978948] [2022-07-19 16:31:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:31:59,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:00,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:00,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054457677] [2022-07-19 16:32:00,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:32:00,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:00,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:00,005 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) [2022-07-19 16:32:00,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 16:32:00,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:32:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:00,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 16:32:00,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:32:00,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:00,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:00,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389978948] [2022-07-19 16:32:00,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:00,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054457677] [2022-07-19 16:32:00,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054457677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:00,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:00,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-19 16:32:00,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420817300] [2022-07-19 16:32:00,324 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:00,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 16:32:00,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 16:32:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-19 16:32:00,326 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) [2022-07-19 16:32:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:00,405 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-19 16:32:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 16:32:00,406 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 [2022-07-19 16:32:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:00,407 INFO L225 Difference]: With dead ends: 34 [2022-07-19 16:32:00,407 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 16:32:00,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-19 16:32:00,408 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-19 16:32:00,409 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] [2022-07-19 16:32:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 16:32:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 16:32:00,414 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) [2022-07-19 16:32:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-19 16:32:00,415 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-07-19 16:32:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:00,415 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-19 16:32:00,415 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) [2022-07-19 16:32:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-19 16:32:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 16:32:00,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:00,417 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:00,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:00,631 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 [2022-07-19 16:32:00,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2022-07-19 16:32:00,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374898017] [2022-07-19 16:32:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:00,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:00,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:00,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248706533] [2022-07-19 16:32:00,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:32:00,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:00,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:00,645 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) [2022-07-19 16:32:00,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 16:32:00,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 16:32:00,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 16:32:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:32:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:05,236 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 [2022-07-19 16:32:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:05,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374898017] [2022-07-19 16:32:05,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:05,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248706533] [2022-07-19 16:32:05,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248706533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:05,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:05,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-19 16:32:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161495868] [2022-07-19 16:32:05,239 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 16:32:05,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 16:32:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2022-07-19 16:32:05,240 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) [2022-07-19 16:32:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:05,442 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-07-19 16:32:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:32:05,443 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 [2022-07-19 16:32:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:05,444 INFO L225 Difference]: With dead ends: 41 [2022-07-19 16:32:05,444 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 16:32:05,444 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 [2022-07-19 16:32:05,445 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:05,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 101 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:32:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 16:32:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-19 16:32:05,452 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) [2022-07-19 16:32:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-19 16:32:05,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2022-07-19 16:32:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:05,453 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-19 16:32:05,453 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) [2022-07-19 16:32:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-19 16:32:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 16:32:05,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:05,455 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:05,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:05,678 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 [2022-07-19 16:32:05,679 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2022-07-19 16:32:05,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:05,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481330201] [2022-07-19 16:32:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:05,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:05,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760010957] [2022-07-19 16:32:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:32:05,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:05,695 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) [2022-07-19 16:32:05,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 16:32:05,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:32:05,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 16:32:05,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 16:32:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481330201] [2022-07-19 16:32:06,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760010957] [2022-07-19 16:32:06,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760010957] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:06,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:06,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-19 16:32:06,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86128036] [2022-07-19 16:32:06,004 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:06,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 16:32:06,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 16:32:06,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-19 16:32:06,005 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) [2022-07-19 16:32:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:06,128 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-07-19 16:32:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:32:06,129 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 [2022-07-19 16:32:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:06,129 INFO L225 Difference]: With dead ends: 44 [2022-07-19 16:32:06,130 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 16:32:06,130 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 [2022-07-19 16:32:06,130 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 [2022-07-19 16:32:06,131 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] [2022-07-19 16:32:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 16:32:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-19 16:32:06,137 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) [2022-07-19 16:32:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-07-19 16:32:06,138 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 43 [2022-07-19 16:32:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:06,139 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-07-19 16:32:06,139 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) [2022-07-19 16:32:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-07-19 16:32:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 16:32:06,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:06,140 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:06,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:06,364 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 [2022-07-19 16:32:06,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2022-07-19 16:32:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134834413] [2022-07-19 16:32:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:06,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603461445] [2022-07-19 16:32:06,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:32:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:06,388 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) [2022-07-19 16:32:06,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 16:32:06,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 16:32:06,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 16:32:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 16:32:06,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134834413] [2022-07-19 16:32:06,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603461445] [2022-07-19 16:32:06,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603461445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:06,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:06,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-19 16:32:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111309640] [2022-07-19 16:32:06,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:06,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 16:32:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 16:32:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-19 16:32:06,967 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) [2022-07-19 16:32:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:07,137 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-07-19 16:32:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 16:32:07,137 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 [2022-07-19 16:32:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:07,138 INFO L225 Difference]: With dead ends: 47 [2022-07-19 16:32:07,138 INFO L226 Difference]: Without dead ends: 42 [2022-07-19 16:32:07,138 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 [2022-07-19 16:32:07,139 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 [2022-07-19 16:32:07,139 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] [2022-07-19 16:32:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-19 16:32:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-19 16:32:07,145 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) [2022-07-19 16:32:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-19 16:32:07,146 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 50 [2022-07-19 16:32:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:07,146 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-19 16:32:07,147 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) [2022-07-19 16:32:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-19 16:32:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 16:32:07,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:07,148 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:07,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:07,363 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 [2022-07-19 16:32:07,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2022-07-19 16:32:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:07,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659337890] [2022-07-19 16:32:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:07,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:07,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524744215] [2022-07-19 16:32:07,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:32:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:07,374 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) [2022-07-19 16:32:07,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 16:32:07,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 16:32:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 16:32:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 16:32:07,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:07,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659337890] [2022-07-19 16:32:07,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524744215] [2022-07-19 16:32:07,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524744215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:07,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:07,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-19 16:32:07,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296356972] [2022-07-19 16:32:07,710 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:07,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 16:32:07,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:07,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 16:32:07,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-19 16:32:07,711 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) [2022-07-19 16:32:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:07,893 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-07-19 16:32:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:32:07,893 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 [2022-07-19 16:32:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:07,894 INFO L225 Difference]: With dead ends: 50 [2022-07-19 16:32:07,894 INFO L226 Difference]: Without dead ends: 45 [2022-07-19 16:32:07,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-19 16:32:07,895 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 [2022-07-19 16:32:07,896 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] [2022-07-19 16:32:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-19 16:32:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-19 16:32:07,902 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) [2022-07-19 16:32:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-19 16:32:07,903 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 57 [2022-07-19 16:32:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:07,904 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-19 16:32:07,904 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) [2022-07-19 16:32:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-19 16:32:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 16:32:07,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:07,905 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:07,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:08,118 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 [2022-07-19 16:32:08,119 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2022-07-19 16:32:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503870703] [2022-07-19 16:32:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:08,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:08,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855147570] [2022-07-19 16:32:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:32:08,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:08,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:08,129 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) [2022-07-19 16:32:08,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 16:32:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:32:08,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 16:32:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 16:32:08,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:08,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:08,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503870703] [2022-07-19 16:32:08,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:08,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855147570] [2022-07-19 16:32:08,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855147570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:08,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:08,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-19 16:32:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835348067] [2022-07-19 16:32:08,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:08,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 16:32:08,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:08,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 16:32:08,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-19 16:32:08,676 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) [2022-07-19 16:32:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:08,896 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-19 16:32:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 16:32:08,897 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 [2022-07-19 16:32:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:08,898 INFO L225 Difference]: With dead ends: 53 [2022-07-19 16:32:08,898 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 16:32:08,898 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 [2022-07-19 16:32:08,898 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 [2022-07-19 16:32:08,899 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] [2022-07-19 16:32:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 16:32:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-19 16:32:08,905 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) [2022-07-19 16:32:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-19 16:32:08,906 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 64 [2022-07-19 16:32:08,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:08,906 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-19 16:32:08,906 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) [2022-07-19 16:32:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-19 16:32:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 16:32:08,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:08,907 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:08,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:09,108 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 [2022-07-19 16:32:09,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2022-07-19 16:32:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:09,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319983849] [2022-07-19 16:32:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:09,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:09,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662414337] [2022-07-19 16:32:09,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:32:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:09,122 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) [2022-07-19 16:32:09,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 16:32:09,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:32:09,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 16:32:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-19 16:32:09,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319983849] [2022-07-19 16:32:09,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662414337] [2022-07-19 16:32:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662414337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:09,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:09,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-19 16:32:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069261561] [2022-07-19 16:32:09,766 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:09,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 16:32:09,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 16:32:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-19 16:32:09,767 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) [2022-07-19 16:32:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:10,032 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-07-19 16:32:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 16:32:10,033 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 [2022-07-19 16:32:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:10,033 INFO L225 Difference]: With dead ends: 56 [2022-07-19 16:32:10,034 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 16:32:10,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-19 16:32:10,034 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 [2022-07-19 16:32:10,035 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] [2022-07-19 16:32:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 16:32:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-19 16:32:10,041 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) [2022-07-19 16:32:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-19 16:32:10,042 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 71 [2022-07-19 16:32:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:10,042 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-19 16:32:10,042 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) [2022-07-19 16:32:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-19 16:32:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 16:32:10,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:10,044 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:10,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:10,251 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 [2022-07-19 16:32:10,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:10,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2022-07-19 16:32:10,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:10,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591941171] [2022-07-19 16:32:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:10,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:10,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:10,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522828305] [2022-07-19 16:32:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:32:10,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:10,268 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) [2022-07-19 16:32:10,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 16:32:10,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-19 16:32:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 16:32:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 16:32:10,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591941171] [2022-07-19 16:32:10,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522828305] [2022-07-19 16:32:10,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522828305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:10,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:10,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-19 16:32:10,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453153459] [2022-07-19 16:32:10,953 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:10,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 16:32:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 16:32:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-19 16:32:10,955 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) [2022-07-19 16:32:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:11,223 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-07-19 16:32:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 16:32:11,224 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 [2022-07-19 16:32:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:11,225 INFO L225 Difference]: With dead ends: 59 [2022-07-19 16:32:11,225 INFO L226 Difference]: Without dead ends: 54 [2022-07-19 16:32:11,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-19 16:32:11,226 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 [2022-07-19 16:32:11,226 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] [2022-07-19 16:32:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-19 16:32:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-19 16:32:11,233 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) [2022-07-19 16:32:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-19 16:32:11,234 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 78 [2022-07-19 16:32:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:11,234 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-19 16:32:11,235 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) [2022-07-19 16:32:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-19 16:32:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 16:32:11,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:11,236 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:11,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:11,441 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 [2022-07-19 16:32:11,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2022-07-19 16:32:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:11,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786358290] [2022-07-19 16:32:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:11,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:11,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006535373] [2022-07-19 16:32:11,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:32:11,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:11,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:11,454 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) [2022-07-19 16:32:11,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 16:32:11,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:32:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:11,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 16:32:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-19 16:32:11,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786358290] [2022-07-19 16:32:12,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006535373] [2022-07-19 16:32:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006535373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:12,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:12,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-19 16:32:12,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295189063] [2022-07-19 16:32:12,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 16:32:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 16:32:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-19 16:32:12,080 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) [2022-07-19 16:32:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:12,375 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-19 16:32:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 16:32:12,375 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 [2022-07-19 16:32:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:12,376 INFO L225 Difference]: With dead ends: 62 [2022-07-19 16:32:12,376 INFO L226 Difference]: Without dead ends: 57 [2022-07-19 16:32:12,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-19 16:32:12,378 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 [2022-07-19 16:32:12,378 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] [2022-07-19 16:32:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-19 16:32:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-19 16:32:12,385 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) [2022-07-19 16:32:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-07-19 16:32:12,386 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 85 [2022-07-19 16:32:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:12,387 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-07-19 16:32:12,387 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) [2022-07-19 16:32:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-07-19 16:32:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-19 16:32:12,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:12,388 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:12,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 16:32:12,594 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 [2022-07-19 16:32:12,594 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2022-07-19 16:32:12,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:12,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102797270] [2022-07-19 16:32:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:12,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:12,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009755609] [2022-07-19 16:32:12,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:32:12,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:12,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:12,612 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) [2022-07-19 16:32:12,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 16:32:13,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-19 16:32:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 16:32:13,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-19 16:32:14,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:14,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102797270] [2022-07-19 16:32:14,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009755609] [2022-07-19 16:32:14,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009755609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:14,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:14,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-19 16:32:14,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055104275] [2022-07-19 16:32:14,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 16:32:14,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 16:32:14,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-19 16:32:14,308 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) [2022-07-19 16:32:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:14,635 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-07-19 16:32:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 16:32:14,635 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 [2022-07-19 16:32:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:14,636 INFO L225 Difference]: With dead ends: 65 [2022-07-19 16:32:14,636 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 16:32:14,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-19 16:32:14,637 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:14,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 359 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:32:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 16:32:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-19 16:32:14,646 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) [2022-07-19 16:32:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-19 16:32:14,647 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 92 [2022-07-19 16:32:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:14,647 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-19 16:32:14,647 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) [2022-07-19 16:32:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-19 16:32:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 16:32:14,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:14,649 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:14,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 16:32:14,856 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 [2022-07-19 16:32:14,857 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 12 times [2022-07-19 16:32:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:14,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685519321] [2022-07-19 16:32:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:14,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:14,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123515929] [2022-07-19 16:32:14,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:32:14,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:14,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:14,877 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) [2022-07-19 16:32:14,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 16:32:15,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-19 16:32:15,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-19 16:32:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:32:15,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:15,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:15,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685519321] [2022-07-19 16:32:15,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:15,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123515929] [2022-07-19 16:32:15,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123515929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:15,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:15,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-19 16:32:15,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610651649] [2022-07-19 16:32:15,615 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:15,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 16:32:15,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 16:32:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-19 16:32:15,616 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) [2022-07-19 16:32:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:15,983 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-07-19 16:32:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 16:32:15,991 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 [2022-07-19 16:32:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:15,992 INFO L225 Difference]: With dead ends: 68 [2022-07-19 16:32:15,992 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 16:32:15,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-19 16:32:15,996 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:15,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 399 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:32:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 16:32:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-19 16:32:16,007 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) [2022-07-19 16:32:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-19 16:32:16,012 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 99 [2022-07-19 16:32:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:16,013 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-19 16:32:16,013 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) [2022-07-19 16:32:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-19 16:32:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-19 16:32:16,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:16,015 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:16,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:16,220 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 [2022-07-19 16:32:16,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 13 times [2022-07-19 16:32:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205004204] [2022-07-19 16:32:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:16,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:16,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615424418] [2022-07-19 16:32:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:32:16,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:16,235 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) [2022-07-19 16:32:16,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 16:32:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:32:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-19 16:32:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-19 16:32:17,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:17,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205004204] [2022-07-19 16:32:17,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615424418] [2022-07-19 16:32:17,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615424418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:17,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:17,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-19 16:32:17,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768661510] [2022-07-19 16:32:17,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:17,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 16:32:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 16:32:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-07-19 16:32:17,844 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) [2022-07-19 16:32:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:18,304 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-19 16:32:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 16:32:18,304 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 [2022-07-19 16:32:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:18,305 INFO L225 Difference]: With dead ends: 71 [2022-07-19 16:32:18,305 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 16:32:18,305 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 [2022-07-19 16:32:18,305 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 [2022-07-19 16:32:18,306 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] [2022-07-19 16:32:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 16:32:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-19 16:32:18,317 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) [2022-07-19 16:32:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-07-19 16:32:18,317 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 106 [2022-07-19 16:32:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:18,317 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-07-19 16:32:18,317 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) [2022-07-19 16:32:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-07-19 16:32:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 16:32:18,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:18,318 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:18,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 16:32:18,518 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 [2022-07-19 16:32:18,519 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 14 times [2022-07-19 16:32:18,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:18,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873067474] [2022-07-19 16:32:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:18,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:18,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:18,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704222021] [2022-07-19 16:32:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:32:18,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:18,544 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) [2022-07-19 16:32:18,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 16:32:19,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:32:19,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:19,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 16:32:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-19 16:32:19,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:20,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873067474] [2022-07-19 16:32:20,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:20,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704222021] [2022-07-19 16:32:20,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704222021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:20,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:20,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-19 16:32:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943122790] [2022-07-19 16:32:20,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:20,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 16:32:20,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 16:32:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-19 16:32:20,337 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) [2022-07-19 16:32:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:20,792 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-07-19 16:32:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 16:32:20,793 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 [2022-07-19 16:32:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:20,794 INFO L225 Difference]: With dead ends: 74 [2022-07-19 16:32:20,794 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 16:32:20,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-19 16:32:20,795 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 [2022-07-19 16:32:20,795 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] [2022-07-19 16:32:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 16:32:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-19 16:32:20,803 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) [2022-07-19 16:32:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-07-19 16:32:20,804 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 113 [2022-07-19 16:32:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:20,804 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-07-19 16:32:20,804 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) [2022-07-19 16:32:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-07-19 16:32:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-19 16:32:20,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:20,806 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:20,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:21,011 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 [2022-07-19 16:32:21,011 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 15 times [2022-07-19 16:32:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:21,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120654655] [2022-07-19 16:32:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:21,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:21,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:21,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672236123] [2022-07-19 16:32:21,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:32:21,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:21,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:21,022 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) [2022-07-19 16:32:21,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 16:32:21,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-19 16:32:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-19 16:32:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-19 16:32:21,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120654655] [2022-07-19 16:32:21,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672236123] [2022-07-19 16:32:21,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672236123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:21,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:21,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-19 16:32:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474675188] [2022-07-19 16:32:21,824 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 16:32:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 16:32:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-07-19 16:32:21,825 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) [2022-07-19 16:32:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:22,320 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-07-19 16:32:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 16:32:22,320 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 [2022-07-19 16:32:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:22,321 INFO L225 Difference]: With dead ends: 77 [2022-07-19 16:32:22,321 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 16:32:22,321 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 [2022-07-19 16:32:22,322 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 [2022-07-19 16:32:22,322 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] [2022-07-19 16:32:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 16:32:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-19 16:32:22,329 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) [2022-07-19 16:32:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-07-19 16:32:22,329 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 120 [2022-07-19 16:32:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:22,330 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-07-19 16:32:22,330 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) [2022-07-19 16:32:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-07-19 16:32:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 16:32:22,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:22,332 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:22,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:22,538 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 [2022-07-19 16:32:22,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 16 times [2022-07-19 16:32:22,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:22,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916019241] [2022-07-19 16:32:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:22,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:22,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362195673] [2022-07-19 16:32:22,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:32:22,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:22,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:22,548 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) [2022-07-19 16:32:22,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 16:32:23,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:32:23,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-19 16:32:23,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-19 16:32:23,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916019241] [2022-07-19 16:32:24,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362195673] [2022-07-19 16:32:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362195673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:24,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:24,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-19 16:32:24,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188353898] [2022-07-19 16:32:24,010 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:24,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 16:32:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 16:32:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-07-19 16:32:24,011 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) [2022-07-19 16:32:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:24,613 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-07-19 16:32:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 16:32:24,614 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 [2022-07-19 16:32:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:24,615 INFO L225 Difference]: With dead ends: 80 [2022-07-19 16:32:24,615 INFO L226 Difference]: Without dead ends: 75 [2022-07-19 16:32:24,615 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 [2022-07-19 16:32:24,616 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:24,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 579 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 16:32:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-19 16:32:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-19 16:32:24,627 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) [2022-07-19 16:32:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-07-19 16:32:24,627 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 127 [2022-07-19 16:32:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:24,630 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-07-19 16:32:24,630 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) [2022-07-19 16:32:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-07-19 16:32:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-19 16:32:24,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:24,632 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:24,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:24,838 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 [2022-07-19 16:32:24,838 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:24,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash 146925304, now seen corresponding path program 17 times [2022-07-19 16:32:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:24,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743113069] [2022-07-19 16:32:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:24,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:24,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:24,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638010872] [2022-07-19 16:32:24,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:32:24,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:24,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:24,848 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) [2022-07-19 16:32:24,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 16:32:26,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-19 16:32:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:26,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-19 16:32:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-19 16:32:26,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:26,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743113069] [2022-07-19 16:32:26,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638010872] [2022-07-19 16:32:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638010872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:26,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:26,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-19 16:32:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88642913] [2022-07-19 16:32:26,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:26,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 16:32:26,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 16:32:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-19 16:32:26,714 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) [2022-07-19 16:32:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:27,290 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-07-19 16:32:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 16:32:27,290 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 [2022-07-19 16:32:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:27,291 INFO L225 Difference]: With dead ends: 83 [2022-07-19 16:32:27,291 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 16:32:27,292 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 [2022-07-19 16:32:27,292 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:27,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 16:32:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 16:32:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-19 16:32:27,299 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) [2022-07-19 16:32:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-07-19 16:32:27,300 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 134 [2022-07-19 16:32:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:27,300 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-07-19 16:32:27,301 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) [2022-07-19 16:32:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-07-19 16:32:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-19 16:32:27,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:27,302 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:27,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:27,502 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 [2022-07-19 16:32:27,502 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1332278625, now seen corresponding path program 18 times [2022-07-19 16:32:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:27,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734207847] [2022-07-19 16:32:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:27,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:27,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439799862] [2022-07-19 16:32:27,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:32:27,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:27,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:27,511 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) [2022-07-19 16:32:27,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 16:32:28,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-19 16:32:28,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:28,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-19 16:32:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-07-19 16:32:29,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734207847] [2022-07-19 16:32:29,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439799862] [2022-07-19 16:32:29,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439799862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:29,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:29,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-19 16:32:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331516865] [2022-07-19 16:32:29,226 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:29,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 16:32:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 16:32:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-07-19 16:32:29,227 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) [2022-07-19 16:32:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:29,960 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-07-19 16:32:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 16:32:29,961 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 [2022-07-19 16:32:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:29,962 INFO L225 Difference]: With dead ends: 86 [2022-07-19 16:32:29,962 INFO L226 Difference]: Without dead ends: 81 [2022-07-19 16:32:29,962 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 [2022-07-19 16:32:29,963 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:29,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 681 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 16:32:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-19 16:32:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-19 16:32:29,974 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) [2022-07-19 16:32:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-07-19 16:32:29,974 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 141 [2022-07-19 16:32:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:29,975 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-07-19 16:32:29,975 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) [2022-07-19 16:32:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-07-19 16:32:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-19 16:32:29,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:29,976 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:29,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:30,177 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 [2022-07-19 16:32:30,177 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2058456792, now seen corresponding path program 19 times [2022-07-19 16:32:30,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:30,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529896074] [2022-07-19 16:32:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:30,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:30,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491159141] [2022-07-19 16:32:30,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:32:30,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:30,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:30,186 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) [2022-07-19 16:32:30,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 16:32:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:32:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-19 16:32:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-19 16:32:31,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:31,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529896074] [2022-07-19 16:32:31,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491159141] [2022-07-19 16:32:31,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491159141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:31,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:31,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-19 16:32:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214809743] [2022-07-19 16:32:31,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:31,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 16:32:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 16:32:31,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-19 16:32:31,757 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) [2022-07-19 16:32:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:32,505 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-07-19 16:32:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 16:32:32,507 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 [2022-07-19 16:32:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:32,509 INFO L225 Difference]: With dead ends: 89 [2022-07-19 16:32:32,509 INFO L226 Difference]: Without dead ends: 84 [2022-07-19 16:32:32,509 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 [2022-07-19 16:32:32,510 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:32,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 16:32:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-19 16:32:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-19 16:32:32,518 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) [2022-07-19 16:32:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-07-19 16:32:32,519 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 148 [2022-07-19 16:32:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:32,519 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-07-19 16:32:32,519 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) [2022-07-19 16:32:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-07-19 16:32:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-19 16:32:32,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:32,521 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:32,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:32,723 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 [2022-07-19 16:32:32,723 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1810280833, now seen corresponding path program 20 times [2022-07-19 16:32:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:32,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597109671] [2022-07-19 16:32:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:32,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:32,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574589550] [2022-07-19 16:32:32,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:32:32,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:32,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:32,734 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) [2022-07-19 16:32:32,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 16:32:33,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:32:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-19 16:32:33,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-07-19 16:32:33,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:34,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:34,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597109671] [2022-07-19 16:32:34,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:34,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574589550] [2022-07-19 16:32:34,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574589550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:34,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:34,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-07-19 16:32:34,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608154043] [2022-07-19 16:32:34,068 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:34,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 16:32:34,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 16:32:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-07-19 16:32:34,069 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) [2022-07-19 16:32:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:34,824 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-19 16:32:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 16:32:34,825 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 [2022-07-19 16:32:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:34,826 INFO L225 Difference]: With dead ends: 92 [2022-07-19 16:32:34,826 INFO L226 Difference]: Without dead ends: 87 [2022-07-19 16:32:34,826 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 [2022-07-19 16:32:34,827 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 [2022-07-19 16:32:34,827 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] [2022-07-19 16:32:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-19 16:32:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-19 16:32:34,848 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) [2022-07-19 16:32:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-07-19 16:32:34,850 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 155 [2022-07-19 16:32:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:34,850 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-07-19 16:32:34,851 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) [2022-07-19 16:32:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-07-19 16:32:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 16:32:34,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:34,852 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:34,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-19 16:32:35,055 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 [2022-07-19 16:32:35,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 548269752, now seen corresponding path program 21 times [2022-07-19 16:32:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:35,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396301808] [2022-07-19 16:32:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:35,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451133248] [2022-07-19 16:32:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:32:35,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:35,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:35,067 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) [2022-07-19 16:32:35,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 16:32:35,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-19 16:32:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-19 16:32:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-19 16:32:36,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396301808] [2022-07-19 16:32:36,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451133248] [2022-07-19 16:32:36,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451133248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:36,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:36,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-07-19 16:32:36,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270179757] [2022-07-19 16:32:36,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 16:32:36,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 16:32:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-07-19 16:32:36,504 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) [2022-07-19 16:32:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:37,287 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-19 16:32:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 16:32:37,287 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 [2022-07-19 16:32:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:37,288 INFO L225 Difference]: With dead ends: 95 [2022-07-19 16:32:37,288 INFO L226 Difference]: Without dead ends: 90 [2022-07-19 16:32:37,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-07-19 16:32:37,289 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 16:32:37,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 849 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 16:32:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-19 16:32:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-19 16:32:37,296 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) [2022-07-19 16:32:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-07-19 16:32:37,297 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 162 [2022-07-19 16:32:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:37,297 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-07-19 16:32:37,297 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) [2022-07-19 16:32:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-07-19 16:32:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-19 16:32:37,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:37,298 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:37,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:37,499 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 [2022-07-19 16:32:37,499 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash -954681951, now seen corresponding path program 22 times [2022-07-19 16:32:37,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:37,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364189850] [2022-07-19 16:32:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:37,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:37,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:37,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066124050] [2022-07-19 16:32:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:32:37,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:37,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:37,510 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) [2022-07-19 16:32:37,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 16:32:38,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:32:38,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:32:38,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-19 16:32:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:32:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-07-19 16:32:38,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:32:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:32:38,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364189850] [2022-07-19 16:32:38,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:32:38,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066124050] [2022-07-19 16:32:38,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066124050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:32:38,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:32:38,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-19 16:32:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750969543] [2022-07-19 16:32:38,692 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:32:38,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 16:32:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:32:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 16:32:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-07-19 16:32:38,693 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) [2022-07-19 16:32:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:32:39,590 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-07-19 16:32:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 16:32:39,590 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 [2022-07-19 16:32:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:32:39,591 INFO L225 Difference]: With dead ends: 98 [2022-07-19 16:32:39,591 INFO L226 Difference]: Without dead ends: 93 [2022-07-19 16:32:39,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 16:32:39,592 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 [2022-07-19 16:32:39,593 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] [2022-07-19 16:32:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-19 16:32:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-19 16:32:39,602 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) [2022-07-19 16:32:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-07-19 16:32:39,603 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 169 [2022-07-19 16:32:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:32:39,603 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-07-19 16:32:39,603 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) [2022-07-19 16:32:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-07-19 16:32:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-19 16:32:39,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:32:39,605 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:32:39,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 16:32:39,810 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 [2022-07-19 16:32:39,810 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:32:39,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:32:39,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1441462632, now seen corresponding path program 23 times [2022-07-19 16:32:39,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:32:39,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12513556] [2022-07-19 16:32:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:32:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:32:39,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:32:39,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644117557] [2022-07-19 16:32:39,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:32:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:32:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:32:39,819 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) [2022-07-19 16:32:39,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 16:34:29,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-19 16:34:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:34:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-19 16:34:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-19 16:34:29,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12513556] [2022-07-19 16:34:30,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644117557] [2022-07-19 16:34:30,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644117557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:30,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:30,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-07-19 16:34:30,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155509621] [2022-07-19 16:34:30,089 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:30,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 16:34:30,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 16:34:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-07-19 16:34:30,091 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) [2022-07-19 16:34:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:31,049 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2022-07-19 16:34:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 16:34:31,050 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 [2022-07-19 16:34:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:31,051 INFO L225 Difference]: With dead ends: 101 [2022-07-19 16:34:31,051 INFO L226 Difference]: Without dead ends: 96 [2022-07-19 16:34:31,051 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 [2022-07-19 16:34:31,052 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 [2022-07-19 16:34:31,052 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] [2022-07-19 16:34:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-19 16:34:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-19 16:34:31,069 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) [2022-07-19 16:34:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-07-19 16:34:31,070 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 176 [2022-07-19 16:34:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:31,071 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-07-19 16:34:31,071 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) [2022-07-19 16:34:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-07-19 16:34:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 16:34:31,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:31,073 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:31,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 16:34:31,284 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 [2022-07-19 16:34:31,285 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1273037249, now seen corresponding path program 24 times [2022-07-19 16:34:31,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:31,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127801869] [2022-07-19 16:34:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:31,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:31,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039005857] [2022-07-19 16:34:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:34:31,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:31,294 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) [2022-07-19 16:34:31,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 16:34:32,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-19 16:34:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:34:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-19 16:34:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-07-19 16:34:33,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:35,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127801869] [2022-07-19 16:34:35,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039005857] [2022-07-19 16:34:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039005857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:35,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-07-19 16:34:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094905465] [2022-07-19 16:34:35,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 16:34:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 16:34:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 16:34:35,238 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) [2022-07-19 16:34:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:36,330 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-07-19 16:34:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 16:34:36,330 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 [2022-07-19 16:34:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:36,331 INFO L225 Difference]: With dead ends: 104 [2022-07-19 16:34:36,332 INFO L226 Difference]: Without dead ends: 99 [2022-07-19 16:34:36,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=702, Invalid=2604, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 16:34:36,334 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 [2022-07-19 16:34:36,334 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] [2022-07-19 16:34:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-19 16:34:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-19 16:34:36,343 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) [2022-07-19 16:34:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2022-07-19 16:34:36,344 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 183 [2022-07-19 16:34:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:36,345 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2022-07-19 16:34:36,345 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) [2022-07-19 16:34:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2022-07-19 16:34:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-19 16:34:36,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:36,346 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:36,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 16:34:36,554 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 [2022-07-19 16:34:36,555 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1983588744, now seen corresponding path program 25 times [2022-07-19 16:34:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:36,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807240519] [2022-07-19 16:34:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:36,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:36,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697208181] [2022-07-19 16:34:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:34:36,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:36,572 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) [2022-07-19 16:34:36,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 16:34:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:34:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-19 16:34:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-07-19 16:34:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807240519] [2022-07-19 16:34:38,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:38,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697208181] [2022-07-19 16:34:38,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697208181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:38,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:38,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-07-19 16:34:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549627329] [2022-07-19 16:34:38,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:38,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 16:34:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 16:34:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 16:34:38,088 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) [2022-07-19 16:34:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:39,137 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2022-07-19 16:34:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 16:34:39,138 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 [2022-07-19 16:34:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:39,138 INFO L225 Difference]: With dead ends: 107 [2022-07-19 16:34:39,139 INFO L226 Difference]: Without dead ends: 102 [2022-07-19 16:34:39,139 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 [2022-07-19 16:34:39,140 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 [2022-07-19 16:34:39,140 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] [2022-07-19 16:34:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-19 16:34:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-19 16:34:39,150 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) [2022-07-19 16:34:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-07-19 16:34:39,151 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 190 [2022-07-19 16:34:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:39,151 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-07-19 16:34:39,152 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) [2022-07-19 16:34:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-07-19 16:34:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-19 16:34:39,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:39,153 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:39,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-19 16:34:39,360 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 [2022-07-19 16:34:39,360 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:39,361 INFO L85 PathProgramCache]: Analyzing trace with hash 832673249, now seen corresponding path program 26 times [2022-07-19 16:34:39,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:39,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083353765] [2022-07-19 16:34:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:39,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:39,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:39,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953991149] [2022-07-19 16:34:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:34:39,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:39,376 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) [2022-07-19 16:34:39,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 16:34:40,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:34:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:34:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-19 16:34:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-07-19 16:34:40,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:40,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083353765] [2022-07-19 16:34:40,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:40,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953991149] [2022-07-19 16:34:40,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953991149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:40,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:40,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-07-19 16:34:40,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91920214] [2022-07-19 16:34:40,977 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:40,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 16:34:40,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 16:34:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 16:34:40,980 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) [2022-07-19 16:34:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:42,082 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-07-19 16:34:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 16:34:42,083 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 [2022-07-19 16:34:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:42,089 INFO L225 Difference]: With dead ends: 110 [2022-07-19 16:34:42,089 INFO L226 Difference]: Without dead ends: 105 [2022-07-19 16:34:42,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 16:34:42,095 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, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:34:42,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1169 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 16:34:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-19 16:34:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-19 16:34:42,106 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) [2022-07-19 16:34:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 130 transitions. [2022-07-19 16:34:42,107 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 130 transitions. Word has length 197 [2022-07-19 16:34:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:42,107 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 130 transitions. [2022-07-19 16:34:42,108 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) [2022-07-19 16:34:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 130 transitions. [2022-07-19 16:34:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-19 16:34:42,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:42,109 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:42,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 16:34:42,316 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 [2022-07-19 16:34:42,317 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash -702849448, now seen corresponding path program 27 times [2022-07-19 16:34:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14264657] [2022-07-19 16:34:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:42,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:42,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:42,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137359081] [2022-07-19 16:34:42,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:34:42,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:42,329 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) [2022-07-19 16:34:42,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 16:34:46,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-19 16:34:46,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:34:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-19 16:34:46,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-07-19 16:34:46,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:46,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:46,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14264657] [2022-07-19 16:34:46,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:46,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137359081] [2022-07-19 16:34:46,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137359081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:46,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:46,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-19 16:34:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921004340] [2022-07-19 16:34:46,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 16:34:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 16:34:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 16:34:46,993 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) [2022-07-19 16:34:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:48,177 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2022-07-19 16:34:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 16:34:48,177 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 [2022-07-19 16:34:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:48,178 INFO L225 Difference]: With dead ends: 113 [2022-07-19 16:34:48,178 INFO L226 Difference]: Without dead ends: 108 [2022-07-19 16:34:48,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 16:34:48,179 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 [2022-07-19 16:34:48,180 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] [2022-07-19 16:34:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-19 16:34:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-19 16:34:48,191 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) [2022-07-19 16:34:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2022-07-19 16:34:48,191 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 204 [2022-07-19 16:34:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:48,192 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2022-07-19 16:34:48,192 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) [2022-07-19 16:34:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2022-07-19 16:34:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-19 16:34:48,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:48,194 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:48,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-19 16:34:48,403 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 [2022-07-19 16:34:48,403 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:48,403 INFO L85 PathProgramCache]: Analyzing trace with hash 473723393, now seen corresponding path program 28 times [2022-07-19 16:34:48,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:48,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266536406] [2022-07-19 16:34:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:48,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:48,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175285544] [2022-07-19 16:34:48,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:34:48,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:48,418 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) [2022-07-19 16:34:48,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 16:34:49,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:34:49,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:34:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-19 16:34:49,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-07-19 16:34:49,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:49,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266536406] [2022-07-19 16:34:49,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175285544] [2022-07-19 16:34:49,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175285544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:49,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:49,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-07-19 16:34:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200375022] [2022-07-19 16:34:49,823 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:49,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 16:34:49,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 16:34:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 16:34:49,824 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) [2022-07-19 16:34:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:51,095 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-07-19 16:34:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 16:34:51,095 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 [2022-07-19 16:34:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:51,096 INFO L225 Difference]: With dead ends: 116 [2022-07-19 16:34:51,096 INFO L226 Difference]: Without dead ends: 111 [2022-07-19 16:34:51,096 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 [2022-07-19 16:34:51,097 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 [2022-07-19 16:34:51,097 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] [2022-07-19 16:34:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-19 16:34:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-19 16:34:51,106 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) [2022-07-19 16:34:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2022-07-19 16:34:51,107 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 211 [2022-07-19 16:34:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:51,107 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2022-07-19 16:34:51,108 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) [2022-07-19 16:34:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2022-07-19 16:34:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-19 16:34:51,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:51,109 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:51,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-19 16:34:51,309 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 [2022-07-19 16:34:51,309 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 687251000, now seen corresponding path program 29 times [2022-07-19 16:34:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:51,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148887217] [2022-07-19 16:34:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:51,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:51,317 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:51,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539018742] [2022-07-19 16:34:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:34:51,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:51,319 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) [2022-07-19 16:34:51,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 16:34:57,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-07-19 16:34:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:34:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-19 16:34:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:34:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-07-19 16:34:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:34:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:34:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148887217] [2022-07-19 16:34:58,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:34:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539018742] [2022-07-19 16:34:58,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539018742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:34:58,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:34:58,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-07-19 16:34:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295425865] [2022-07-19 16:34:58,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:34:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 16:34:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:34:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 16:34:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 16:34:58,179 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) [2022-07-19 16:34:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:34:59,515 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-07-19 16:34:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 16:34:59,515 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 [2022-07-19 16:34:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:34:59,516 INFO L225 Difference]: With dead ends: 119 [2022-07-19 16:34:59,516 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 16:34:59,517 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 [2022-07-19 16:34:59,517 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 [2022-07-19 16:34:59,518 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] [2022-07-19 16:34:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 16:34:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-19 16:34:59,529 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) [2022-07-19 16:34:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-07-19 16:34:59,530 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 218 [2022-07-19 16:34:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:34:59,530 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-07-19 16:34:59,530 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) [2022-07-19 16:34:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-07-19 16:34:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-19 16:34:59,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:34:59,532 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:34:59,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-19 16:34:59,739 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 [2022-07-19 16:34:59,739 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:34:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:34:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916577, now seen corresponding path program 30 times [2022-07-19 16:34:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:34:59,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297254274] [2022-07-19 16:34:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:34:59,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:34:59,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:34:59,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606082746] [2022-07-19 16:34:59,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:34:59,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:34:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:34:59,748 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) [2022-07-19 16:34:59,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 16:35:14,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-07-19 16:35:14,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:35:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-19 16:35:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:35:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-07-19 16:35:15,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:35:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:35:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297254274] [2022-07-19 16:35:15,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:35:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606082746] [2022-07-19 16:35:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606082746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:35:15,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:35:15,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-19 16:35:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738607553] [2022-07-19 16:35:15,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:35:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 16:35:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:35:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 16:35:15,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 16:35:15,840 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) [2022-07-19 16:35:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:35:17,255 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2022-07-19 16:35:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 16:35:17,255 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 [2022-07-19 16:35:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:35:17,256 INFO L225 Difference]: With dead ends: 122 [2022-07-19 16:35:17,257 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 16:35:17,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 16:35:17,258 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 [2022-07-19 16:35:17,258 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] [2022-07-19 16:35:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 16:35:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-19 16:35:17,269 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) [2022-07-19 16:35:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2022-07-19 16:35:17,275 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 225 [2022-07-19 16:35:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:35:17,276 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2022-07-19 16:35:17,276 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) [2022-07-19 16:35:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2022-07-19 16:35:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-19 16:35:17,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:35:17,278 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:35:17,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-19 16:35:17,487 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 [2022-07-19 16:35:17,487 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:35:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:35:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2142541336, now seen corresponding path program 31 times [2022-07-19 16:35:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:35:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856621679] [2022-07-19 16:35:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:35:17,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:35:17,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:35:17,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207492688] [2022-07-19 16:35:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 16:35:17,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:35:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:35:17,496 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) [2022-07-19 16:35:17,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 16:35:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:35:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-19 16:35:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:35:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-07-19 16:35:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:35:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:35:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856621679] [2022-07-19 16:35:19,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:35:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207492688] [2022-07-19 16:35:19,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207492688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:35:19,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:35:19,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-07-19 16:35:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201772397] [2022-07-19 16:35:19,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:35:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 16:35:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:35:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 16:35:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 16:35:19,317 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) [2022-07-19 16:35:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:35:20,839 INFO L93 Difference]: Finished difference Result 125 states and 155 transitions. [2022-07-19 16:35:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 16:35:20,840 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 [2022-07-19 16:35:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:35:20,841 INFO L225 Difference]: With dead ends: 125 [2022-07-19 16:35:20,841 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 16:35:20,841 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 [2022-07-19 16:35:20,841 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 2 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 16:35:20,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1539 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 16:35:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 16:35:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-19 16:35:20,854 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) [2022-07-19 16:35:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2022-07-19 16:35:20,855 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 232 [2022-07-19 16:35:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:35:20,855 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2022-07-19 16:35:20,856 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) [2022-07-19 16:35:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2022-07-19 16:35:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-19 16:35:20,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:35:20,857 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:35:20,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 16:35:21,065 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 [2022-07-19 16:35:21,065 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:35:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:35:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1846084161, now seen corresponding path program 32 times [2022-07-19 16:35:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:35:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100253621] [2022-07-19 16:35:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:35:21,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:35:21,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:35:21,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382505976] [2022-07-19 16:35:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:35:21,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:35:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:35:21,075 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) [2022-07-19 16:35:21,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 16:35:22,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:35:22,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:35:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-19 16:35:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:35:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-07-19 16:35:22,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:35:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:35:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100253621] [2022-07-19 16:35:23,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:35:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382505976] [2022-07-19 16:35:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382505976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:35:23,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:35:23,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-07-19 16:35:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755426202] [2022-07-19 16:35:23,046 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:35:23,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 16:35:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:35:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 16:35:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 16:35:23,047 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) [2022-07-19 16:35:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:35:24,635 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-07-19 16:35:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 16:35:24,636 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 [2022-07-19 16:35:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:35:24,637 INFO L225 Difference]: With dead ends: 128 [2022-07-19 16:35:24,637 INFO L226 Difference]: Without dead ends: 123 [2022-07-19 16:35:24,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 16:35:24,638 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 16:35:24,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1619 Invalid, 3645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3645 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 16:35:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-19 16:35:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-07-19 16:35:24,648 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) [2022-07-19 16:35:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2022-07-19 16:35:24,648 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 239 [2022-07-19 16:35:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:35:24,648 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2022-07-19 16:35:24,649 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) [2022-07-19 16:35:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2022-07-19 16:35:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-19 16:35:24,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:35:24,650 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:35:24,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-19 16:35:24,850 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 [2022-07-19 16:35:24,850 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:35:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:35:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash 456345080, now seen corresponding path program 33 times [2022-07-19 16:35:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:35:24,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111974669] [2022-07-19 16:35:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:35:24,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:35:24,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:35:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320241582] [2022-07-19 16:35:24,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:35:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:35:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:35:24,859 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) [2022-07-19 16:35:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 16:35:26,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-07-19 16:35:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:35:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-19 16:35:26,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:35:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-07-19 16:35:27,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:35:27,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:35:27,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111974669] [2022-07-19 16:35:27,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:35:27,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320241582] [2022-07-19 16:35:27,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320241582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:35:27,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:35:27,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-07-19 16:35:27,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082137455] [2022-07-19 16:35:27,268 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:35:27,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 16:35:27,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:35:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 16:35:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 16:35:27,270 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) [2022-07-19 16:35:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:35:29,063 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-07-19 16:35:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 16:35:29,063 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 [2022-07-19 16:35:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:35:29,064 INFO L225 Difference]: With dead ends: 131 [2022-07-19 16:35:29,064 INFO L226 Difference]: Without dead ends: 126 [2022-07-19 16:35:29,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 16:35:29,065 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 3857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 16:35:29,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1701 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3857 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 16:35:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-19 16:35:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-19 16:35:29,080 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) [2022-07-19 16:35:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-07-19 16:35:29,081 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 246 [2022-07-19 16:35:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:35:29,082 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-07-19 16:35:29,082 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) [2022-07-19 16:35:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-07-19 16:35:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-19 16:35:29,083 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:35:29,083 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:35:29,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-19 16:35:29,292 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 [2022-07-19 16:35:29,293 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:35:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:35:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1535030881, now seen corresponding path program 34 times [2022-07-19 16:35:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:35:29,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552994694] [2022-07-19 16:35:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:35:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:35:29,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:35:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275527526] [2022-07-19 16:35:29,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 16:35:29,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:35:29,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:35:29,302 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) [2022-07-19 16:35:29,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 16:35:30,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 16:35:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:35:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-19 16:35:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:35:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-07-19 16:35:31,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:35:31,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:35:31,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552994694] [2022-07-19 16:35:31,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:35:31,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275527526] [2022-07-19 16:35:31,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275527526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:35:31,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:35:31,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-19 16:35:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310947358] [2022-07-19 16:35:31,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:35:31,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 16:35:31,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:35:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 16:35:31,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 16:35:31,822 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) [2022-07-19 16:35:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:35:33,844 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-07-19 16:35:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 16:35:33,844 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 [2022-07-19 16:35:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:35:33,845 INFO L225 Difference]: With dead ends: 134 [2022-07-19 16:35:33,845 INFO L226 Difference]: Without dead ends: 129 [2022-07-19 16:35:33,846 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 [2022-07-19 16:35:33,846 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 16:35:33,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1785 Invalid, 4075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 16:35:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-19 16:35:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-19 16:35:33,860 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) [2022-07-19 16:35:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2022-07-19 16:35:33,861 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 253 [2022-07-19 16:35:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:35:33,861 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2022-07-19 16:35:33,861 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) [2022-07-19 16:35:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2022-07-19 16:35:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-19 16:35:33,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:35:33,863 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:35:33,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-19 16:35:34,072 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 [2022-07-19 16:35:34,072 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:35:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:35:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1607511512, now seen corresponding path program 35 times [2022-07-19 16:35:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:35:34,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919091228] [2022-07-19 16:35:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:35:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:35:34,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:35:34,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871288715] [2022-07-19 16:35:34,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 16:35:34,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:35:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:35:34,090 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) [2022-07-19 16:35:34,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-19 16:36:01,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-07-19 16:36:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:36:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 148 conjunts are in the unsatisfiable core [2022-07-19 16:36:01,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:36:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-07-19 16:36:02,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:36:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:36:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919091228] [2022-07-19 16:36:02,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:36:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871288715] [2022-07-19 16:36:02,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871288715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:36:02,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:36:02,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-07-19 16:36:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102694191] [2022-07-19 16:36:02,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:36:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 16:36:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:36:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 16:36:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 16:36:02,302 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) [2022-07-19 16:36:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:36:04,150 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2022-07-19 16:36:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 16:36:04,150 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 [2022-07-19 16:36:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:36:04,151 INFO L225 Difference]: With dead ends: 137 [2022-07-19 16:36:04,151 INFO L226 Difference]: Without dead ends: 132 [2022-07-19 16:36:04,151 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 [2022-07-19 16:36:04,152 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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 [2022-07-19 16:36:04,152 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] [2022-07-19 16:36:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-19 16:36:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-19 16:36:04,161 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) [2022-07-19 16:36:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2022-07-19 16:36:04,162 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 260 [2022-07-19 16:36:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:36:04,162 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2022-07-19 16:36:04,163 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) [2022-07-19 16:36:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2022-07-19 16:36:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-07-19 16:36:04,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:36:04,164 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:36:04,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-19 16:36:04,371 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 [2022-07-19 16:36:04,371 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:36:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:36:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1705594239, now seen corresponding path program 36 times [2022-07-19 16:36:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:36:04,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929044930] [2022-07-19 16:36:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:36:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:36:04,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:36:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746386416] [2022-07-19 16:36:04,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 16:36:04,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:36:04,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:36:04,380 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) [2022-07-19 16:36:04,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process