./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.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 06e8f3b5d2ce31d1088d1852191b4960da9738d8116cb1cbdca2e60a833578cb --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:41:10,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:41:10,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:41:10,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:41:10,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:41:10,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:41:10,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:41:10,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:41:10,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:41:10,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:41:10,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:41:10,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:41:10,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:41:10,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:41:10,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:41:10,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:41:10,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:41:10,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:41:10,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:41:10,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:41:10,195 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:41:10,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:41:10,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:41:10,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:41:10,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:41:10,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:41:10,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:41:10,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:41:10,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:41:10,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:41:10,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:41:10,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:41:10,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:41:10,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:41:10,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:41:10,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:41:10,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:41:10,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:41:10,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:41:10,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:41:10,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:41:10,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:41:10,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:41:10,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:41:10,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:41:10,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:41:10,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:41:10,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:41:10,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:41:10,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:41:10,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:41:10,241 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:41:10,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:41:10,242 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:41:10,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:41:10,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:41:10,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:41:10,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:41:10,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:41:10,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:41:10,243 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:41:10,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:41:10,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:41:10,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:41:10,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:41:10,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:41:10,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:41:10,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:41:10,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:41:10,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:41:10,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:41:10,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:41:10,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:41:10,246 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:41:10,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:41:10,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:41:10,246 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e8f3b5d2ce31d1088d1852191b4960da9738d8116cb1cbdca2e60a833578cb [2022-07-22 16:41:10,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:41:10,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:41:10,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:41:10,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:41:10,473 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:41:10,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2022-07-22 16:41:10,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2d85342d/dd7b980c0da6467f9739b69717a48f7c/FLAGa9076998e [2022-07-22 16:41:10,898 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:41:10,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2022-07-22 16:41:10,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2d85342d/dd7b980c0da6467f9739b69717a48f7c/FLAGa9076998e [2022-07-22 16:41:10,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2d85342d/dd7b980c0da6467f9739b69717a48f7c [2022-07-22 16:41:10,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:41:10,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:41:10,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:41:10,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:41:10,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:41:10,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:41:10" (1/1) ... [2022-07-22 16:41:10,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21fd049f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:10, skipping insertion in model container [2022-07-22 16:41:10,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:41:10" (1/1) ... [2022-07-22 16:41:10,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:41:10,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:41:11,064 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c[537,550] [2022-07-22 16:41:11,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:41:11,079 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:41:11,087 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c[537,550] [2022-07-22 16:41:11,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:41:11,099 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:41:11,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11 WrapperNode [2022-07-22 16:41:11,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:41:11,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:41:11,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:41:11,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:41:11,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,120 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-07-22 16:41:11,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:41:11,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:41:11,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:41:11,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:41:11,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:41:11,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:41:11,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:41:11,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:41:11,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (1/1) ... [2022-07-22 16:41:11,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:41:11,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:11,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 16:41:11,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 16:41:11,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:41:11,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:41:11,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:41:11,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:41:11,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:41:11,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:41:11,246 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:41:11,247 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:41:11,319 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:41:11,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:41:11,323 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 16:41:11,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:41:11 BoogieIcfgContainer [2022-07-22 16:41:11,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:41:11,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:41:11,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:41:11,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:41:11,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:41:10" (1/3) ... [2022-07-22 16:41:11,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f58266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:41:11, skipping insertion in model container [2022-07-22 16:41:11,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:41:11" (2/3) ... [2022-07-22 16:41:11,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f58266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:41:11, skipping insertion in model container [2022-07-22 16:41:11,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:41:11" (3/3) ... [2022-07-22 16:41:11,331 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.c [2022-07-22 16:41:11,340 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:41:11,340 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:41:11,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:41:11,388 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@5eb08061, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d19e0ec [2022-07-22 16:41:11,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:41:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:41:11,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:11,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:11,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2022-07-22 16:41:11,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:11,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973879849] [2022-07-22 16:41:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:11,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973879849] [2022-07-22 16:41:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973879849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:11,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:11,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:41:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104137617] [2022-07-22 16:41:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:11,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:41:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:41:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:41:11,602 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:41:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:11,624 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-07-22 16:41:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:41:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 16:41:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:11,637 INFO L225 Difference]: With dead ends: 39 [2022-07-22 16:41:11,637 INFO L226 Difference]: Without dead ends: 17 [2022-07-22 16:41:11,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:41:11,646 INFO L413 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:11,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-22 16:41:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-22 16:41:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:41:11,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-22 16:41:11,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-07-22 16:41:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:11,681 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-22 16:41:11,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:41:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-22 16:41:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 16:41:11,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:11,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:41:11,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2022-07-22 16:41:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:11,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325486257] [2022-07-22 16:41:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:11,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325486257] [2022-07-22 16:41:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325486257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:11,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:11,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 16:41:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408974306] [2022-07-22 16:41:11,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 16:41:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 16:41:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:41:11,769 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:41:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:11,780 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-07-22 16:41:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 16:41:11,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 16:41:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:11,782 INFO L225 Difference]: With dead ends: 26 [2022-07-22 16:41:11,782 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 16:41:11,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:41:11,784 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:11,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 16:41:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 16:41:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:41:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-22 16:41:11,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2022-07-22 16:41:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:11,787 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-22 16:41:11,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:41:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-22 16:41:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 16:41:11,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:11,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:11,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:41:11,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:11,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2022-07-22 16:41:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:11,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371367877] [2022-07-22 16:41:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:11,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:11,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:11,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873132673] [2022-07-22 16:41:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:11,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:11,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:11,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:11,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:41:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 16:41:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:11,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:41:11,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:11,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371367877] [2022-07-22 16:41:11,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:11,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873132673] [2022-07-22 16:41:11,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873132673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:11,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:11,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:41:11,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87491304] [2022-07-22 16:41:11,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:11,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:41:11,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:11,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:41:11,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:41:11,941 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:41:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:11,978 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-22 16:41:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:41:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 16:41:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:11,979 INFO L225 Difference]: With dead ends: 30 [2022-07-22 16:41:11,979 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 16:41:11,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:41:11,980 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:11,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 16:41:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-22 16:41:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-07-22 16:41:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-22 16:41:11,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-07-22 16:41:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:11,985 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-22 16:41:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:41:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-22 16:41:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 16:41:11,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:11,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:12,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:12,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2022-07-22 16:41:12,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720980189] [2022-07-22 16:41:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:12,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:12,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316693377] [2022-07-22 16:41:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:12,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:12,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:12,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:41:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:41:12,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:12,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:41:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:12,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720980189] [2022-07-22 16:41:12,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:12,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316693377] [2022-07-22 16:41:12,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316693377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:41:12,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:41:12,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:41:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690871397] [2022-07-22 16:41:12,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:41:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:41:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:41:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:41:12,321 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:41:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:12,396 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-22 16:41:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:41:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-22 16:41:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:12,398 INFO L225 Difference]: With dead ends: 34 [2022-07-22 16:41:12,398 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 16:41:12,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:41:12,399 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:12,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 16:41:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-22 16:41:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 16:41:12,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-07-22 16:41:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:12,403 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 16:41:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:41:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 16:41:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 16:41:12,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:12,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:12,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:12,621 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,SelfDestructingSolverStorable3 [2022-07-22 16:41:12,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:12,622 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2022-07-22 16:41:12,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528477299] [2022-07-22 16:41:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:12,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:12,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:12,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533639605] [2022-07-22 16:41:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:12,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:12,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:41:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 16:41:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:12,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:12,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528477299] [2022-07-22 16:41:12,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533639605] [2022-07-22 16:41:12,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533639605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:12,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:12,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-22 16:41:12,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087593265] [2022-07-22 16:41:12,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:12,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:41:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:41:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:41:12,772 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:12,835 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-22 16:41:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 16:41:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 16:41:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:12,837 INFO L225 Difference]: With dead ends: 62 [2022-07-22 16:41:12,837 INFO L226 Difference]: Without dead ends: 55 [2022-07-22 16:41:12,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:41:12,842 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:12,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:41:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-22 16:41:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-07-22 16:41:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:41:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-07-22 16:41:12,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2022-07-22 16:41:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:12,851 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-07-22 16:41:12,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-07-22 16:41:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 16:41:12,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:12,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:12,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:13,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:13,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2022-07-22 16:41:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:13,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207680703] [2022-07-22 16:41:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:13,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:13,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032725565] [2022-07-22 16:41:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:13,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:13,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:13,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:41:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 16:41:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:13,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:18,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207680703] [2022-07-22 16:41:18,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032725565] [2022-07-22 16:41:18,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032725565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:18,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:18,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-22 16:41:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848283492] [2022-07-22 16:41:18,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 16:41:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 16:41:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2022-07-22 16:41:18,696 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:19,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:22,536 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-07-22 16:41:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:41:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 16:41:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:22,539 INFO L225 Difference]: With dead ends: 86 [2022-07-22 16:41:22,539 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 16:41:22,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=75, Invalid=304, Unknown=1, NotChecked=0, Total=380 [2022-07-22 16:41:22,539 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:22,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 16:41:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 16:41:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-07-22 16:41:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:41:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-07-22 16:41:22,557 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 20 [2022-07-22 16:41:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:22,557 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-07-22 16:41:22,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-07-22 16:41:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 16:41:22,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:22,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:22,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:22,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:22,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2022-07-22 16:41:22,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:22,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386486791] [2022-07-22 16:41:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:22,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:22,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142555415] [2022-07-22 16:41:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:22,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:22,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:22,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:41:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 16:41:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:25,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:41:26,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:26,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386486791] [2022-07-22 16:41:26,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:26,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142555415] [2022-07-22 16:41:26,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142555415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:26,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:26,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-07-22 16:41:26,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355582292] [2022-07-22 16:41:26,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:26,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:41:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:41:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:41:26,488 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:27,328 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-07-22 16:41:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:41:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 16:41:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:27,329 INFO L225 Difference]: With dead ends: 115 [2022-07-22 16:41:27,329 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 16:41:27,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-07-22 16:41:27,330 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:27,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 76 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:41:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 16:41:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-07-22 16:41:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:41:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-07-22 16:41:27,337 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 20 [2022-07-22 16:41:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:27,337 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-07-22 16:41:27,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-07-22 16:41:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 16:41:27,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:27,338 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:27,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:27,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:27,538 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2022-07-22 16:41:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:27,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869868752] [2022-07-22 16:41:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:27,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:27,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:27,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791001974] [2022-07-22 16:41:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:27,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:27,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:27,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:41:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 16:41:27,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:41:27,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:41:27,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:27,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869868752] [2022-07-22 16:41:27,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:27,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791001974] [2022-07-22 16:41:27,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791001974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:27,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:27,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-22 16:41:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832781114] [2022-07-22 16:41:27,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:41:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:41:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:41:27,683 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:41:29,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:29,767 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2022-07-22 16:41:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:41:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-22 16:41:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:29,768 INFO L225 Difference]: With dead ends: 92 [2022-07-22 16:41:29,768 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 16:41:29,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:41:29,769 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:29,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 16:41:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 16:41:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-07-22 16:41:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:41:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-07-22 16:41:29,775 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 26 [2022-07-22 16:41:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:29,778 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-07-22 16:41:29,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:41:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-07-22 16:41:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 16:41:29,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:29,781 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:29,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:29,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:29,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash -158147061, now seen corresponding path program 1 times [2022-07-22 16:41:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084052160] [2022-07-22 16:41:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:30,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:30,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619850209] [2022-07-22 16:41:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:30,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:30,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:30,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:30,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:41:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 16:41:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:41:45,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 16:41:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084052160] [2022-07-22 16:41:59,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619850209] [2022-07-22 16:41:59,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619850209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:59,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:59,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-07-22 16:41:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388431343] [2022-07-22 16:41:59,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:59,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 16:41:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 16:41:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=376, Unknown=1, NotChecked=0, Total=462 [2022-07-22 16:41:59,098 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:42:20,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:22,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:23,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:31,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:31,429 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-07-22 16:42:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 16:42:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-07-22 16:42:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:31,430 INFO L225 Difference]: With dead ends: 113 [2022-07-22 16:42:31,430 INFO L226 Difference]: Without dead ends: 111 [2022-07-22 16:42:31,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=152, Invalid=658, Unknown=2, NotChecked=0, Total=812 [2022-07-22 16:42:31,431 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:31,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 199 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 377 Invalid, 1 Unknown, 26 Unchecked, 7.2s Time] [2022-07-22 16:42:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-22 16:42:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2022-07-22 16:42:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 90 states have internal predecessors, (98), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:42:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2022-07-22 16:42:31,450 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 40 [2022-07-22 16:42:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:31,450 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2022-07-22 16:42:31,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:42:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2022-07-22 16:42:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:42:31,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:31,454 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:31,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 16:42:31,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:31,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2022-07-22 16:42:31,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586235253] [2022-07-22 16:42:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:31,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:31,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201911978] [2022-07-22 16:42:31,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:31,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:31,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:42:31,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:42:31,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:42:31,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:42:31,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 16:42:31,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586235253] [2022-07-22 16:42:31,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201911978] [2022-07-22 16:42:31,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201911978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:31,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:31,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-22 16:42:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503129415] [2022-07-22 16:42:31,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:31,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:42:31,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:42:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:42:31,897 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:42:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:32,015 INFO L93 Difference]: Finished difference Result 288 states and 330 transitions. [2022-07-22 16:42:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 16:42:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-07-22 16:42:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:32,016 INFO L225 Difference]: With dead ends: 288 [2022-07-22 16:42:32,016 INFO L226 Difference]: Without dead ends: 281 [2022-07-22 16:42:32,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:42:32,017 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:32,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 155 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:42:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-07-22 16:42:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2022-07-22 16:42:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 215 states have (on average 1.1348837209302325) internal successors, (244), 224 states have internal predecessors, (244), 29 states have call successors, (29), 26 states have call predecessors, (29), 26 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:42:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 301 transitions. [2022-07-22 16:42:32,049 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 301 transitions. Word has length 50 [2022-07-22 16:42:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:32,049 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 301 transitions. [2022-07-22 16:42:32,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:42:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 301 transitions. [2022-07-22 16:42:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:42:32,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:32,054 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:32,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:42:32,267 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,SelfDestructingSolverStorable9 [2022-07-22 16:42:32,268 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 26253931, now seen corresponding path program 2 times [2022-07-22 16:42:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:32,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045974579] [2022-07-22 16:42:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:32,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:32,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:32,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000631612] [2022-07-22 16:42:32,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:32,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:42:32,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:42:32,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 16:42:32,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:42:51,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:46,831 WARN L833 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~x~0#1| 2) 0) (let ((.cse5 (< |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse0 (= (mod |c_ULTIMATE.start_main_~y~0#1| 2) 0))) (and (or .cse0 (and (forall ((|v_ULTIMATE.start_main_~y~0#1_67| Int)) (let ((.cse1 (* |c_ULTIMATE.start_main_~x~0#1| 2))) (let ((.cse2 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_67| .cse1))) (or (<= 0 (div (* |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_main_~y~0#1_67|) .cse1)) (not (<= (+ (div |c_ULTIMATE.start_main_~y~0#1| 2) 1) |v_ULTIMATE.start_main_~y~0#1_67|)) (= (mod (div (div (div (+ (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse2 (* (- 1) |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (- 2)) .cse1) 2) 2) 0) (not (= (mod (div .cse2 (- 2)) .cse1) 0)))))) (forall ((|v_ULTIMATE.start_main_~y~0#1_67| Int)) (let ((.cse3 (* |c_ULTIMATE.start_main_~x~0#1| 2))) (let ((.cse4 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_67| .cse3))) (or (<= 0 (div (* |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_main_~y~0#1_67|) .cse3)) (= (mod (div (div (+ (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse4 (* (- 1) |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (- 2)) .cse3) 2) 0) (not (<= (+ (div |c_ULTIMATE.start_main_~y~0#1| 2) 1) |v_ULTIMATE.start_main_~y~0#1_67|)) (not (= (mod (div .cse4 (- 2)) .cse3) 0))))))) (not .cse5)) (or (and (forall ((|v_ULTIMATE.start_main_~y~0#1_67| Int)) (let ((.cse6 (* |c_ULTIMATE.start_main_~x~0#1| 2))) (let ((.cse7 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_67| .cse6))) (or (not (<= (div |c_ULTIMATE.start_main_~y~0#1| 2) |v_ULTIMATE.start_main_~y~0#1_67|)) (<= 0 (div (* |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_main_~y~0#1_67|) .cse6)) (= (mod (div (div (+ (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse7 (* (- 1) |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (- 2)) .cse6) 2) 0) (not (= (mod (div .cse7 (- 2)) .cse6) 0)))))) (forall ((|v_ULTIMATE.start_main_~y~0#1_67| Int)) (let ((.cse8 (* |c_ULTIMATE.start_main_~x~0#1| 2))) (let ((.cse9 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_67| .cse8))) (or (not (<= (div |c_ULTIMATE.start_main_~y~0#1| 2) |v_ULTIMATE.start_main_~y~0#1_67|)) (<= 0 (div (* |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_main_~y~0#1_67|) .cse8)) (= (mod (div (div (div (+ (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse9 (* (- 1) |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (- 2)) .cse8) 2) 2) 0) (not (= (mod (div .cse9 (- 2)) .cse8) 0))))))) (and .cse5 (not .cse0)))))) is different from false [2022-07-22 16:45:15,441 WARN L233 SmtUtils]: Spent 10.19s on a formula simplification. DAG size of input: 52 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:45:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:15,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045974579] [2022-07-22 16:45:15,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:15,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000631612] [2022-07-22 16:45:15,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000631612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:15,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:15,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-22 16:45:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359495611] [2022-07-22 16:45:15,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 16:45:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 16:45:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=645, Unknown=12, NotChecked=54, Total=870 [2022-07-22 16:45:15,856 INFO L87 Difference]: Start difference. First operand 271 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:45:20,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:26,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:29,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:31,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:33,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:35,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:37,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:39,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:41,665 INFO L93 Difference]: Finished difference Result 395 states and 459 transitions. [2022-07-22 16:45:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 16:45:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2022-07-22 16:45:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:41,668 INFO L225 Difference]: With dead ends: 395 [2022-07-22 16:45:41,668 INFO L226 Difference]: Without dead ends: 393 [2022-07-22 16:45:41,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 79.1s TimeCoverageRelationStatistics Valid=304, Invalid=1326, Unknown=14, NotChecked=78, Total=1722 [2022-07-22 16:45:41,669 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:41,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 206 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 269 Invalid, 3 Unknown, 53 Unchecked, 17.0s Time] [2022-07-22 16:45:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-22 16:45:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 271. [2022-07-22 16:45:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 215 states have (on average 1.1348837209302325) internal successors, (244), 224 states have internal predecessors, (244), 29 states have call successors, (29), 26 states have call predecessors, (29), 26 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:45:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 301 transitions. [2022-07-22 16:45:41,686 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 301 transitions. Word has length 50 [2022-07-22 16:45:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:41,687 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 301 transitions. [2022-07-22 16:45:41,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:45:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 301 transitions. [2022-07-22 16:45:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:45:41,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:41,688 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:41,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 16:45:41,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:41,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash -493632277, now seen corresponding path program 3 times [2022-07-22 16:45:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:41,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810411292] [2022-07-22 16:45:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:41,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:41,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667537794] [2022-07-22 16:45:41,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:45:41,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:41,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:45:41,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:45:41,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 16:45:41,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 16:45:44,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 16:45:47,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810411292] [2022-07-22 16:45:47,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667537794] [2022-07-22 16:45:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667537794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:45:47,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:45:47,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-07-22 16:45:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158718204] [2022-07-22 16:45:47,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:45:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:47,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:45:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:45:47,150 INFO L87 Difference]: Start difference. First operand 271 states and 301 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 16:45:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:50,040 INFO L93 Difference]: Finished difference Result 358 states and 400 transitions. [2022-07-22 16:45:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:45:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-07-22 16:45:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:50,042 INFO L225 Difference]: With dead ends: 358 [2022-07-22 16:45:50,042 INFO L226 Difference]: Without dead ends: 356 [2022-07-22 16:45:50,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:45:50,043 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:50,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 140 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 16:45:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-22 16:45:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 202. [2022-07-22 16:45:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 163 states have internal predecessors, (188), 20 states have call successors, (20), 19 states have call predecessors, (20), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 16:45:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 227 transitions. [2022-07-22 16:45:50,057 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 227 transitions. Word has length 50 [2022-07-22 16:45:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:50,058 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 227 transitions. [2022-07-22 16:45:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 16:45:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 227 transitions. [2022-07-22 16:45:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 16:45:50,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:50,059 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:50,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:50,281 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,SelfDestructingSolverStorable11 [2022-07-22 16:45:50,281 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:50,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1891003445, now seen corresponding path program 2 times [2022-07-22 16:45:50,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236775437] [2022-07-22 16:45:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:50,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:50,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128815334] [2022-07-22 16:45:50,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:45:50,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:50,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:50,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:45:50,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:45:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 16:45:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates...