./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:18:40,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:18:40,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:18:40,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:18:40,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:18:40,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:18:40,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:18:40,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:18:40,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:18:40,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:18:40,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:18:40,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:18:40,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:18:40,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:18:40,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:18:40,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:18:40,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:18:40,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:18:40,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:18:40,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:18:40,060 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:18:40,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:18:40,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:18:40,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:18:40,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:18:40,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:18:40,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:18:40,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:18:40,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:18:40,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:18:40,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:18:40,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:18:40,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:18:40,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:18:40,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:18:40,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:18:40,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:18:40,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:18:40,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:18:40,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:18:40,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:18:40,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:18:40,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:18:40,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:18:40,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:18:40,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:18:40,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:18:40,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:18:40,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:18:40,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:18:40,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:18:40,125 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:18:40,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:18:40,126 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:18:40,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:18:40,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:18:40,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:18:40,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:18:40,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:18:40,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:18:40,127 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:18:40,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:18:40,127 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:18:40,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:18:40,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:18:40,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:18:40,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:18:40,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:18:40,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:18:40,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:18:40,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:18:40,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:18:40,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:18:40,133 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:18:40,133 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:18:40,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:18:40,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2022-07-12 04:18:40,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:18:40,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:18:40,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:18:40,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:18:40,333 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:18:40,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-12 04:18:40,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27ac6b866/f53552cdff8f40a287135e285227f352/FLAG211183f3b [2022-07-12 04:18:40,744 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:18:40,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-12 04:18:40,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27ac6b866/f53552cdff8f40a287135e285227f352/FLAG211183f3b [2022-07-12 04:18:41,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27ac6b866/f53552cdff8f40a287135e285227f352 [2022-07-12 04:18:41,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:18:41,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:18:41,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:18:41,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:18:41,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:18:41,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49328b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41, skipping insertion in model container [2022-07-12 04:18:41,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:18:41,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:18:41,270 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/egcd3-ll.c[490,503] [2022-07-12 04:18:41,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:18:41,287 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:18:41,295 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/egcd3-ll.c[490,503] [2022-07-12 04:18:41,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:18:41,326 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:18:41,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41 WrapperNode [2022-07-12 04:18:41,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:18:41,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:18:41,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:18:41,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:18:41,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,360 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-07-12 04:18:41,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:18:41,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:18:41,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:18:41,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:18:41,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:18:41,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:18:41,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:18:41,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:18:41,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (1/1) ... [2022-07-12 04:18:41,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:18:41,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:41,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 04:18:41,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 04:18:41,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:18:41,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 04:18:41,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 04:18:41,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:18:41,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:18:41,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:18:41,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:18:41,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:18:41,481 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:18:41,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:18:41,565 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:18:41,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:18:41,583 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 04:18:41,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:18:41 BoogieIcfgContainer [2022-07-12 04:18:41,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:18:41,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:18:41,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:18:41,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:18:41,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:18:41" (1/3) ... [2022-07-12 04:18:41,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2aed50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:18:41, skipping insertion in model container [2022-07-12 04:18:41,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:18:41" (2/3) ... [2022-07-12 04:18:41,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2aed50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:18:41, skipping insertion in model container [2022-07-12 04:18:41,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:18:41" (3/3) ... [2022-07-12 04:18:41,600 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-07-12 04:18:41,609 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:18:41,609 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:18:41,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:18:41,656 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@3d7fc545, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@264af7c0 [2022-07-12 04:18:41,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:18:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:18:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 04:18:41,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:41,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:41,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2022-07-12 04:18:41,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:41,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313205680] [2022-07-12 04:18:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:41,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:18:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 04:18:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:18:41,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:41,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313205680] [2022-07-12 04:18:41,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313205680] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:41,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:41,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:18:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548873292] [2022-07-12 04:18:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:41,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:18:41,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:18:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:18:41,837 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:18:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:41,859 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2022-07-12 04:18:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:18:41,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-12 04:18:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:41,867 INFO L225 Difference]: With dead ends: 61 [2022-07-12 04:18:41,867 INFO L226 Difference]: Without dead ends: 28 [2022-07-12 04:18:41,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:18:41,874 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:41,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:18:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-12 04:18:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-12 04:18:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 04:18:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-12 04:18:41,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2022-07-12 04:18:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:41,914 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-12 04:18:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:18:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-12 04:18:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 04:18:41,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:41,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:41,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:18:41,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2022-07-12 04:18:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:41,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348061988] [2022-07-12 04:18:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:41,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:41,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618666008] [2022-07-12 04:18:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:41,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:41,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:18:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:18:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:42,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:18:42,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348061988] [2022-07-12 04:18:42,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618666008] [2022-07-12 04:18:42,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618666008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:42,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:42,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 04:18:42,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648137784] [2022-07-12 04:18:42,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:42,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:18:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:42,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:18:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:18:42,111 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:18:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:42,205 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-07-12 04:18:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:18:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-12 04:18:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:42,207 INFO L225 Difference]: With dead ends: 47 [2022-07-12 04:18:42,207 INFO L226 Difference]: Without dead ends: 40 [2022-07-12 04:18:42,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:18:42,209 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:42,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 104 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:18:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-12 04:18:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-07-12 04:18:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 04:18:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-12 04:18:42,215 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-07-12 04:18:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:42,216 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-12 04:18:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:18:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-12 04:18:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 04:18:42,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:42,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:42,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:42,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2022-07-12 04:18:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:42,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673126536] [2022-07-12 04:18:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:42,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:42,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768488337] [2022-07-12 04:18:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:42,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:42,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:42,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:18:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:42,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:18:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:42,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:18:42,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673126536] [2022-07-12 04:18:42,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768488337] [2022-07-12 04:18:42,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768488337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:42,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:42,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 04:18:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840734967] [2022-07-12 04:18:42,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:42,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:18:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:18:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:18:42,705 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:18:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:42,794 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-12 04:18:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:18:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-12 04:18:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:42,798 INFO L225 Difference]: With dead ends: 46 [2022-07-12 04:18:42,798 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 04:18:42,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:18:42,802 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:42,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 147 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:18:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 04:18:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-12 04:18:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 04:18:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-07-12 04:18:42,820 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-07-12 04:18:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:42,820 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-07-12 04:18:42,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:18:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-07-12 04:18:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 04:18:42,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:42,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:42,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:43,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-12 04:18:43,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2022-07-12 04:18:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029419823] [2022-07-12 04:18:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:43,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:43,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:43,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566262689] [2022-07-12 04:18:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:43,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:43,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:43,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:43,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:18:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:18:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:43,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:18:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:43,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:43,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029419823] [2022-07-12 04:18:43,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:43,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566262689] [2022-07-12 04:18:43,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566262689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:18:43,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:18:43,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 04:18:43,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13890057] [2022-07-12 04:18:43,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:18:43,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:18:43,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:18:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:18:43,225 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:18:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:43,367 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2022-07-12 04:18:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:18:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-07-12 04:18:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:43,368 INFO L225 Difference]: With dead ends: 96 [2022-07-12 04:18:43,369 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 04:18:43,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:18:43,369 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:43,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 161 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:18:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 04:18:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-12 04:18:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 04:18:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-07-12 04:18:43,380 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2022-07-12 04:18:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:43,380 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-07-12 04:18:43,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:18:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-07-12 04:18:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:18:43,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:43,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:43,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:43,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2022-07-12 04:18:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:43,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449879365] [2022-07-12 04:18:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:43,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621230561] [2022-07-12 04:18:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:43,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:43,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:18:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:43,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:18:43,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:43,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:18:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449879365] [2022-07-12 04:18:43,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621230561] [2022-07-12 04:18:43,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621230561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:43,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:43,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 04:18:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865293074] [2022-07-12 04:18:43,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:43,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:18:43,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:18:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:18:43,728 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 04:18:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:43,813 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-12 04:18:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:18:43,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-12 04:18:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:43,816 INFO L225 Difference]: With dead ends: 72 [2022-07-12 04:18:43,816 INFO L226 Difference]: Without dead ends: 70 [2022-07-12 04:18:43,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:18:43,817 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:43,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:18:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-12 04:18:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-07-12 04:18:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 04:18:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2022-07-12 04:18:43,827 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2022-07-12 04:18:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:43,828 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2022-07-12 04:18:43,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 04:18:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2022-07-12 04:18:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:18:43,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:43,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:43,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:44,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:44,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:44,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2022-07-12 04:18:44,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:44,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562226784] [2022-07-12 04:18:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:44,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:44,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:44,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886254536] [2022-07-12 04:18:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:44,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:44,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:44,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:44,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:18:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:44,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:18:44,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:44,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:18:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:18:44,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:44,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562226784] [2022-07-12 04:18:44,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:44,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886254536] [2022-07-12 04:18:44,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886254536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:18:44,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:18:44,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-07-12 04:18:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137196144] [2022-07-12 04:18:44,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:18:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:18:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:18:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:18:44,246 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:18:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:44,399 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2022-07-12 04:18:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:18:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-07-12 04:18:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:44,402 INFO L225 Difference]: With dead ends: 104 [2022-07-12 04:18:44,402 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 04:18:44,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:18:44,404 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:44,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:18:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 04:18:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-07-12 04:18:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 04:18:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2022-07-12 04:18:44,430 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2022-07-12 04:18:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:44,431 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2022-07-12 04:18:44,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:18:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2022-07-12 04:18:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:18:44,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:44,435 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:44,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:44,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:44,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2022-07-12 04:18:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:44,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135201349] [2022-07-12 04:18:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:44,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571654061] [2022-07-12 04:18:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:44,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:44,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:44,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:18:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:44,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:18:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:18:44,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:18:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135201349] [2022-07-12 04:18:44,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571654061] [2022-07-12 04:18:44,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571654061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:44,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:44,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:18:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984771962] [2022-07-12 04:18:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:18:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:18:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:18:44,726 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:18:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:44,766 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2022-07-12 04:18:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:18:44,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-12 04:18:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:44,769 INFO L225 Difference]: With dead ends: 144 [2022-07-12 04:18:44,769 INFO L226 Difference]: Without dead ends: 142 [2022-07-12 04:18:44,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:18:44,770 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:44,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:18:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-12 04:18:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-07-12 04:18:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-12 04:18:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2022-07-12 04:18:44,792 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2022-07-12 04:18:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:44,792 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2022-07-12 04:18:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:18:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2022-07-12 04:18:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:18:44,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:44,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:44,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:45,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:45,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2022-07-12 04:18:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069950768] [2022-07-12 04:18:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:45,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074140805] [2022-07-12 04:18:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:45,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:45,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:45,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:18:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:18:45,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:18:45,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:18:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:18:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069950768] [2022-07-12 04:18:45,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074140805] [2022-07-12 04:18:45,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074140805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:18:45,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:18:45,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-07-12 04:18:45,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312042095] [2022-07-12 04:18:45,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:18:45,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:18:45,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:18:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:18:45,448 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 04:18:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:52,310 INFO L93 Difference]: Finished difference Result 258 states and 380 transitions. [2022-07-12 04:18:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 04:18:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-07-12 04:18:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:52,312 INFO L225 Difference]: With dead ends: 258 [2022-07-12 04:18:52,312 INFO L226 Difference]: Without dead ends: 256 [2022-07-12 04:18:52,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 04:18:52,313 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 168 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:52,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 246 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-12 04:18:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-12 04:18:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 204. [2022-07-12 04:18:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 137 states have internal predecessors, (176), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-12 04:18:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 293 transitions. [2022-07-12 04:18:52,345 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 293 transitions. Word has length 32 [2022-07-12 04:18:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:52,346 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 293 transitions. [2022-07-12 04:18:52,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-12 04:18:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 293 transitions. [2022-07-12 04:18:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:18:52,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:52,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:52,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 04:18:52,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:52,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:52,554 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2022-07-12 04:18:52,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:52,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245060717] [2022-07-12 04:18:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:52,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:52,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966191227] [2022-07-12 04:18:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:18:52,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:52,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:52,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:18:52,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:18:52,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:18:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:18:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:18:52,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:18:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245060717] [2022-07-12 04:18:52,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966191227] [2022-07-12 04:18:52,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966191227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:52,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:52,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:18:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822624852] [2022-07-12 04:18:52,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:18:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:18:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:18:52,651 INFO L87 Difference]: Start difference. First operand 204 states and 293 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:18:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:52,733 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2022-07-12 04:18:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:18:52,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-07-12 04:18:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:52,734 INFO L225 Difference]: With dead ends: 247 [2022-07-12 04:18:52,734 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 04:18:52,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:18:52,747 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:52,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 119 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:18:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 04:18:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-07-12 04:18:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-12 04:18:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-07-12 04:18:52,762 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2022-07-12 04:18:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:52,762 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-07-12 04:18:52,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:18:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-07-12 04:18:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:18:52,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:52,764 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:52,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:52,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 04:18:52,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2022-07-12 04:18:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:52,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746551] [2022-07-12 04:18:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:52,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175403679] [2022-07-12 04:18:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:52,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:52,987 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:52,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:18:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:18:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:18:53,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:18:53,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746551] [2022-07-12 04:18:53,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175403679] [2022-07-12 04:18:53,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175403679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:18:53,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:18:53,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:18:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180946942] [2022-07-12 04:18:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:18:53,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:18:53,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:18:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:18:53,041 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 04:18:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:18:53,087 INFO L93 Difference]: Finished difference Result 187 states and 271 transitions. [2022-07-12 04:18:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:18:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-07-12 04:18:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:18:53,088 INFO L225 Difference]: With dead ends: 187 [2022-07-12 04:18:53,088 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 04:18:53,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:18:53,089 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:18:53,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:18:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 04:18:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2022-07-12 04:18:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2022-07-12 04:18:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-07-12 04:18:53,114 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2022-07-12 04:18:53,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:18:53,114 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-07-12 04:18:53,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 04:18:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-07-12 04:18:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 04:18:53,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:18:53,116 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:18:53,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:18:53,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 04:18:53,327 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:18:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:18:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2022-07-12 04:18:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:18:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6693741] [2022-07-12 04:18:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:18:53,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:18:53,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472365943] [2022-07-12 04:18:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:18:53,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:18:53,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:18:53,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:18:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:18:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:18:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 04:18:53,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:18:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:18:53,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:18:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:18:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:18:54,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6693741] [2022-07-12 04:18:54,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:18:54,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472365943] [2022-07-12 04:18:54,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472365943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:18:54,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:18:54,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-07-12 04:18:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264645067] [2022-07-12 04:18:54,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:18:54,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:18:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:18:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:18:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:18:54,866 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-12 04:19:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:10,845 INFO L93 Difference]: Finished difference Result 408 states and 603 transitions. [2022-07-12 04:19:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 04:19:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2022-07-12 04:19:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:10,848 INFO L225 Difference]: With dead ends: 408 [2022-07-12 04:19:10,849 INFO L226 Difference]: Without dead ends: 305 [2022-07-12 04:19:10,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:19:10,850 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:10,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 197 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-12 04:19:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-12 04:19:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 247. [2022-07-12 04:19:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 154 states have internal predecessors, (177), 87 states have call successors, (87), 12 states have call predecessors, (87), 12 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-12 04:19:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 350 transitions. [2022-07-12 04:19:10,903 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 350 transitions. Word has length 49 [2022-07-12 04:19:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:10,903 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 350 transitions. [2022-07-12 04:19:10,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-12 04:19:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 350 transitions. [2022-07-12 04:19:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 04:19:10,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:10,904 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:10,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-12 04:19:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 04:19:11,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2022-07-12 04:19:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427873692] [2022-07-12 04:19:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:11,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:11,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:11,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252646637] [2022-07-12 04:19:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:11,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:11,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:11,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:19:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:19:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-12 04:19:11,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-12 04:19:11,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427873692] [2022-07-12 04:19:11,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252646637] [2022-07-12 04:19:11,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252646637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:19:11,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:19:11,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2022-07-12 04:19:11,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476747666] [2022-07-12 04:19:11,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:19:11,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 04:19:11,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 04:19:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:19:11,370 INFO L87 Difference]: Start difference. First operand 247 states and 350 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-12 04:19:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:11,700 INFO L93 Difference]: Finished difference Result 278 states and 394 transitions. [2022-07-12 04:19:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:19:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-07-12 04:19:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:11,703 INFO L225 Difference]: With dead ends: 278 [2022-07-12 04:19:11,703 INFO L226 Difference]: Without dead ends: 276 [2022-07-12 04:19:11,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:19:11,704 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:11,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 152 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:19:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-12 04:19:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-07-12 04:19:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 87 states have call successors, (87), 13 states have call predecessors, (87), 13 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-12 04:19:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 353 transitions. [2022-07-12 04:19:11,752 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 353 transitions. Word has length 59 [2022-07-12 04:19:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:11,752 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 353 transitions. [2022-07-12 04:19:11,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-12 04:19:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 353 transitions. [2022-07-12 04:19:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 04:19:11,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:11,753 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:11,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:11,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 04:19:11,955 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2022-07-12 04:19:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712510407] [2022-07-12 04:19:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:11,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:11,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358858060] [2022-07-12 04:19:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:11,970 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:11,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:19:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 04:19:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:19:12,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 04:19:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712510407] [2022-07-12 04:19:12,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358858060] [2022-07-12 04:19:12,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358858060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:19:12,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:19:12,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-12 04:19:12,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346935973] [2022-07-12 04:19:12,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:19:12,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:19:12,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:19:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:19:12,194 INFO L87 Difference]: Start difference. First operand 251 states and 353 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-12 04:19:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:12,597 INFO L93 Difference]: Finished difference Result 300 states and 419 transitions. [2022-07-12 04:19:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:19:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-07-12 04:19:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:12,600 INFO L225 Difference]: With dead ends: 300 [2022-07-12 04:19:12,600 INFO L226 Difference]: Without dead ends: 298 [2022-07-12 04:19:12,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:19:12,601 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:12,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 248 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:19:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-12 04:19:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 263. [2022-07-12 04:19:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 159 states have (on average 1.1886792452830188) internal successors, (189), 166 states have internal predecessors, (189), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-12 04:19:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 362 transitions. [2022-07-12 04:19:12,655 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 362 transitions. Word has length 57 [2022-07-12 04:19:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:12,656 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 362 transitions. [2022-07-12 04:19:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-12 04:19:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 362 transitions. [2022-07-12 04:19:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 04:19:12,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:12,657 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:12,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:12,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 04:19:12,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2022-07-12 04:19:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:12,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346901756] [2022-07-12 04:19:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:12,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:12,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708481035] [2022-07-12 04:19:12,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:19:12,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:12,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:12,879 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:12,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:19:12,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:19:12,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:19:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:19:12,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 04:19:12,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:19:12,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346901756] [2022-07-12 04:19:12,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708481035] [2022-07-12 04:19:12,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708481035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:19:12,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:19:12,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:19:12,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394146550] [2022-07-12 04:19:12,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:12,938 INFO L87 Difference]: Start difference. First operand 263 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:19:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:13,026 INFO L93 Difference]: Finished difference Result 457 states and 635 transitions. [2022-07-12 04:19:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:19:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-12 04:19:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:13,028 INFO L225 Difference]: With dead ends: 457 [2022-07-12 04:19:13,028 INFO L226 Difference]: Without dead ends: 287 [2022-07-12 04:19:13,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:19:13,029 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:13,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:19:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-12 04:19:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 272. [2022-07-12 04:19:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 169 states have internal predecessors, (200), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-12 04:19:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 373 transitions. [2022-07-12 04:19:13,078 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 373 transitions. Word has length 62 [2022-07-12 04:19:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:13,078 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 373 transitions. [2022-07-12 04:19:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:19:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 373 transitions. [2022-07-12 04:19:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 04:19:13,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:13,079 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:13,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:13,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 04:19:13,295 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2022-07-12 04:19:13,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:13,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309382810] [2022-07-12 04:19:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:13,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:13,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:13,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797485991] [2022-07-12 04:19:13,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:19:13,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:13,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:13,306 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:13,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:19:13,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:19:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:19:13,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-12 04:19:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:19:13,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:19:21,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:21,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309382810] [2022-07-12 04:19:21,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:21,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797485991] [2022-07-12 04:19:21,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797485991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:19:21,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:19:21,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-07-12 04:19:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418052231] [2022-07-12 04:19:21,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:19:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 04:19:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 04:19:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=638, Unknown=1, NotChecked=0, Total=756 [2022-07-12 04:19:21,231 INFO L87 Difference]: Start difference. First operand 272 states and 373 transitions. Second operand has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-12 04:19:39,845 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 115 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:20:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:20:10,318 INFO L93 Difference]: Finished difference Result 396 states and 534 transitions. [2022-07-12 04:20:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 04:20:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 62 [2022-07-12 04:20:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:20:10,333 INFO L225 Difference]: With dead ends: 396 [2022-07-12 04:20:10,333 INFO L226 Difference]: Without dead ends: 394 [2022-07-12 04:20:10,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=1101, Invalid=4448, Unknown=1, NotChecked=0, Total=5550 [2022-07-12 04:20:10,335 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 211 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:20:10,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 372 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1388 Invalid, 0 Unknown, 325 Unchecked, 12.7s Time] [2022-07-12 04:20:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-12 04:20:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2022-07-12 04:20:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 236 states have (on average 1.1694915254237288) internal successors, (276), 240 states have internal predecessors, (276), 113 states have call successors, (113), 22 states have call predecessors, (113), 22 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2022-07-12 04:20:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 501 transitions. [2022-07-12 04:20:10,414 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 501 transitions. Word has length 62 [2022-07-12 04:20:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:20:10,415 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 501 transitions. [2022-07-12 04:20:10,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-12 04:20:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 501 transitions. [2022-07-12 04:20:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 04:20:10,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:20:10,416 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:20:10,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:20:10,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:20:10,632 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:20:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:20:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2022-07-12 04:20:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:20:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18189744] [2022-07-12 04:20:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:20:10,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:20:10,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:20:10,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801089724] [2022-07-12 04:20:10,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:20:10,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:20:10,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:20:10,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:20:10,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:20:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:20:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-12 04:20:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:20:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-12 04:20:11,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:20:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-12 04:20:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:20:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18189744] [2022-07-12 04:20:12,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:20:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801089724] [2022-07-12 04:20:12,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801089724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:20:12,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:20:12,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-12 04:20:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042793060] [2022-07-12 04:20:12,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:20:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 04:20:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:20:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 04:20:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-07-12 04:20:12,330 INFO L87 Difference]: Start difference. First operand 372 states and 501 transitions. Second operand has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 04:20:19,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:22,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:28,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:29,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:33,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:36,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:45,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:47,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:49,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:51,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:54,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:20:58,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:21:06,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:21:08,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:21:10,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:21:12,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:21:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:13,762 INFO L93 Difference]: Finished difference Result 609 states and 865 transitions. [2022-07-12 04:21:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 04:21:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 76 [2022-07-12 04:21:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:13,765 INFO L225 Difference]: With dead ends: 609 [2022-07-12 04:21:13,765 INFO L226 Difference]: Without dead ends: 605 [2022-07-12 04:21:13,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=991, Invalid=5015, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 04:21:13,767 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 200 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 494 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:13,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 405 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 1959 Invalid, 13 Unknown, 0 Unchecked, 46.2s Time] [2022-07-12 04:21:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-07-12 04:21:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 545. [2022-07-12 04:21:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 327 states have (on average 1.198776758409786) internal successors, (392), 331 states have internal predecessors, (392), 189 states have call successors, (189), 28 states have call predecessors, (189), 28 states have return successors, (188), 185 states have call predecessors, (188), 188 states have call successors, (188) [2022-07-12 04:21:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 769 transitions. [2022-07-12 04:21:13,932 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 769 transitions. Word has length 76 [2022-07-12 04:21:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:13,933 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 769 transitions. [2022-07-12 04:21:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 04:21:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 769 transitions. [2022-07-12 04:21:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 04:21:13,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:13,934 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:13,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-12 04:21:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 04:21:14,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2022-07-12 04:21:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:14,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946694434] [2022-07-12 04:21:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:14,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:14,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213422733] [2022-07-12 04:21:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:14,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:14,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:14,158 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:14,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:21:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:14,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:21:14,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 04:21:14,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:14,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946694434] [2022-07-12 04:21:14,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213422733] [2022-07-12 04:21:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213422733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:14,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:21:14,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-12 04:21:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901160653] [2022-07-12 04:21:14,537 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:21:14,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:21:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:21:14,538 INFO L87 Difference]: Start difference. First operand 545 states and 769 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:21:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:15,009 INFO L93 Difference]: Finished difference Result 579 states and 817 transitions. [2022-07-12 04:21:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:21:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-07-12 04:21:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:15,012 INFO L225 Difference]: With dead ends: 579 [2022-07-12 04:21:15,012 INFO L226 Difference]: Without dead ends: 577 [2022-07-12 04:21:15,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:21:15,013 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:15,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 209 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:21:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-07-12 04:21:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 574. [2022-07-12 04:21:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 342 states have (on average 1.2017543859649122) internal successors, (411), 346 states have internal predecessors, (411), 201 states have call successors, (201), 30 states have call predecessors, (201), 30 states have return successors, (200), 197 states have call predecessors, (200), 200 states have call successors, (200) [2022-07-12 04:21:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 812 transitions. [2022-07-12 04:21:15,181 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 812 transitions. Word has length 79 [2022-07-12 04:21:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:15,182 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 812 transitions. [2022-07-12 04:21:15,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:21:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 812 transitions. [2022-07-12 04:21:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 04:21:15,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:15,183 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:15,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:15,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 04:21:15,399 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2022-07-12 04:21:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574893858] [2022-07-12 04:21:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:15,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:15,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827117724] [2022-07-12 04:21:15,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:21:15,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:15,414 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:15,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:21:15,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:21:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:21:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 04:21:15,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 04:21:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574893858] [2022-07-12 04:21:15,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827117724] [2022-07-12 04:21:15,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827117724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:15,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:21:15,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-07-12 04:21:15,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163512856] [2022-07-12 04:21:15,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:15,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:21:15,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:21:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:21:15,589 INFO L87 Difference]: Start difference. First operand 574 states and 812 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:21:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:16,256 INFO L93 Difference]: Finished difference Result 683 states and 964 transitions. [2022-07-12 04:21:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 04:21:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2022-07-12 04:21:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:16,262 INFO L225 Difference]: With dead ends: 683 [2022-07-12 04:21:16,262 INFO L226 Difference]: Without dead ends: 676 [2022-07-12 04:21:16,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:21:16,263 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 65 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:16,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 316 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:21:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-07-12 04:21:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 546. [2022-07-12 04:21:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 320 states have (on average 1.209375) internal successors, (387), 323 states have internal predecessors, (387), 195 states have call successors, (195), 30 states have call predecessors, (195), 30 states have return successors, (194), 192 states have call predecessors, (194), 194 states have call successors, (194) [2022-07-12 04:21:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 776 transitions. [2022-07-12 04:21:16,432 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 776 transitions. Word has length 84 [2022-07-12 04:21:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:16,432 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 776 transitions. [2022-07-12 04:21:16,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:21:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 776 transitions. [2022-07-12 04:21:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 04:21:16,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:16,435 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:16,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:16,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 04:21:16,656 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2022-07-12 04:21:16,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:16,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604124933] [2022-07-12 04:21:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:16,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:16,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011427848] [2022-07-12 04:21:16,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:21:16,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:16,671 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:16,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:21:16,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:21:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:16,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-12 04:21:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 92 proven. 55 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-12 04:21:17,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:29,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604124933] [2022-07-12 04:21:29,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011427848] [2022-07-12 04:21:29,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011427848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:29,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:21:29,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-12 04:21:29,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902226044] [2022-07-12 04:21:29,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:29,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 04:21:29,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 04:21:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=567, Unknown=2, NotChecked=0, Total=702 [2022-07-12 04:21:29,248 INFO L87 Difference]: Start difference. First operand 546 states and 776 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-12 04:21:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:31,111 INFO L93 Difference]: Finished difference Result 632 states and 896 transitions. [2022-07-12 04:21:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:21:31,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 96 [2022-07-12 04:21:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:31,114 INFO L225 Difference]: With dead ends: 632 [2022-07-12 04:21:31,114 INFO L226 Difference]: Without dead ends: 629 [2022-07-12 04:21:31,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=184, Invalid=806, Unknown=2, NotChecked=0, Total=992 [2022-07-12 04:21:31,115 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:31,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 231 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 04:21:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-07-12 04:21:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 550. [2022-07-12 04:21:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 323 states have (on average 1.2074303405572755) internal successors, (390), 326 states have internal predecessors, (390), 195 states have call successors, (195), 31 states have call predecessors, (195), 31 states have return successors, (194), 192 states have call predecessors, (194), 194 states have call successors, (194) [2022-07-12 04:21:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 779 transitions. [2022-07-12 04:21:31,289 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 779 transitions. Word has length 96 [2022-07-12 04:21:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:31,290 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 779 transitions. [2022-07-12 04:21:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-12 04:21:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 779 transitions. [2022-07-12 04:21:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-12 04:21:31,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:31,292 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:31,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:31,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:31,514 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash -717331702, now seen corresponding path program 2 times [2022-07-12 04:21:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:31,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790591073] [2022-07-12 04:21:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:31,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:31,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89440165] [2022-07-12 04:21:31,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:21:31,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:31,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:31,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:31,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:21:31,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:21:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 04:21:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 112 proven. 50 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-12 04:21:33,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:22:08,117 WARN L233 SmtUtils]: Spent 14.06s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:23:12,112 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0) (= (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| (div (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|)) .cse0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse1 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse1 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse1 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse2 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse2 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))))) is different from true