./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/divbin2_unwindbound20.i -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 cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:52:53,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:52:53,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:52:53,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:52:53,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:52:53,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:52:53,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:52:53,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:52:53,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:52:53,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:52:53,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:52:53,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:52:53,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:52:53,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:52:53,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:52:53,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:52:53,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:52:53,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:52:53,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:52:53,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:52:53,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:52:53,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:52:53,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:52:53,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:52:53,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:52:53,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:52:53,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:52:53,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:52:53,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:52:53,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:52:53,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:52:53,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:52:53,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:52:53,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:52:53,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:52:53,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:52:53,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:52:53,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:52:53,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:52:53,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:52:53,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:52:53,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:52:53,166 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:52:53,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:52:53,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:52:53,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:52:53,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:52:53,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:52:53,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:52:53,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:52:53,169 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:52:53,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:52:53,170 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:52:53,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:52:53,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:52:53,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:52:53,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:52:53,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:52:53,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:52:53,172 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:52:53,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:52:53,172 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:52:53,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:52:53,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:52:53,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:52:53,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:52:53,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:52:53,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:52:53,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:52:53,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:52:53,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:52:53,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:52:53,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:52:53,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:52:53,175 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:52:53,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:52:53,175 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:52:53,176 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d [2023-02-16 01:52:53,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:52:53,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:52:53,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:52:53,443 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:52:53,443 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:52:53,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2023-02-16 01:52:54,507 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:52:54,671 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:52:54,672 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2023-02-16 01:52:54,677 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0750bee8d/f52a57fc97d949fca5f1be7c2e3a3129/FLAG587b35a67 [2023-02-16 01:52:54,687 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0750bee8d/f52a57fc97d949fca5f1be7c2e3a3129 [2023-02-16 01:52:54,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:52:54,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:52:54,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:52:54,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:52:54,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:52:54,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1056782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54, skipping insertion in model container [2023-02-16 01:52:54,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:52:54,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:52:54,844 WARN L237 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/divbin2_unwindbound20.i[951,964] [2023-02-16 01:52:54,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:52:54,873 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:52:54,883 WARN L237 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/divbin2_unwindbound20.i[951,964] [2023-02-16 01:52:54,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:52:54,898 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:52:54,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54 WrapperNode [2023-02-16 01:52:54,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:52:54,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:52:54,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:52:54,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:52:54,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,921 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-02-16 01:52:54,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:52:54,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:52:54,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:52:54,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:52:54,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,936 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:52:54,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:52:54,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:52:54,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:52:54,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (1/1) ... [2023-02-16 01:52:54,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:52:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:54,961 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) [2023-02-16 01:52:54,963 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 [2023-02-16 01:52:54,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:52:54,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:52:54,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:52:55,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:52:55,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 01:52:55,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 01:52:55,057 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:52:55,059 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:52:55,259 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:52:55,263 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:52:55,264 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 01:52:55,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:52:55 BoogieIcfgContainer [2023-02-16 01:52:55,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:52:55,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:52:55,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:52:55,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:52:55,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:52:54" (1/3) ... [2023-02-16 01:52:55,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dfd098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:52:55, skipping insertion in model container [2023-02-16 01:52:55,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:52:54" (2/3) ... [2023-02-16 01:52:55,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dfd098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:52:55, skipping insertion in model container [2023-02-16 01:52:55,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:52:55" (3/3) ... [2023-02-16 01:52:55,272 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2023-02-16 01:52:55,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:52:55,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:52:55,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:52:55,376 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@13292ae3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:52:55,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:52:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2023-02-16 01:52:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:52:55,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:55,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:55,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2023-02-16 01:52:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:55,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674345789] [2023-02-16 01:52:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:55,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:55,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:55,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674345789] [2023-02-16 01:52:55,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 01:52:55,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523342297] [2023-02-16 01:52:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:55,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:55,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:55,495 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) [2023-02-16 01:52:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:52:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 01:52:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:55,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:52:55,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523342297] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:52:55,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:52:55,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:52:55,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523623448] [2023-02-16 01:52:55,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:52:55,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:52:55,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:52:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:52:55,588 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-16 01:52:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:55,604 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2023-02-16 01:52:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:52:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2023-02-16 01:52:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:55,610 INFO L225 Difference]: With dead ends: 37 [2023-02-16 01:52:55,613 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 01:52:55,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:52:55,619 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2023-02-16 01:52:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 01:52:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 01:52:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) [2023-02-16 01:52:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-16 01:52:55,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2023-02-16 01:52:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:55,656 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-16 01:52:55,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-16 01:52:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-16 01:52:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 01:52:55,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:55,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:55,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 01:52:55,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2023-02-16 01:52:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:55,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392073509] [2023-02-16 01:52:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:55,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392073509] [2023-02-16 01:52:55,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 01:52:55,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058804361] [2023-02-16 01:52:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:55,896 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) [2023-02-16 01:52:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:52:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 01:52:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:56,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:52:56,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058804361] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:52:56,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:52:56,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:52:56,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760401466] [2023-02-16 01:52:56,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:52:56,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:52:56,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:56,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:52:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:52:56,010 INFO L87 Difference]: Start difference. First operand 17 states and 22 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) [2023-02-16 01:52:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:56,024 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2023-02-16 01:52:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:52:56,025 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 [2023-02-16 01:52:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:56,025 INFO L225 Difference]: With dead ends: 31 [2023-02-16 01:52:56,026 INFO L226 Difference]: Without dead ends: 19 [2023-02-16 01:52:56,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:52:56,027 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:56,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-16 01:52:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-16 01:52:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-02-16 01:52:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-16 01:52:56,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-16 01:52:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:56,035 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-16 01:52:56,036 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) [2023-02-16 01:52:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-16 01:52:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 01:52:56,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:56,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:56,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:56,238 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,SelfDestructingSolverStorable1 [2023-02-16 01:52:56,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2023-02-16 01:52:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598163954] [2023-02-16 01:52:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:56,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:56,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28018281] [2023-02-16 01:52:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:56,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:56,272 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) [2023-02-16 01:52:56,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:52:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:52:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:56,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:52:56,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:56,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598163954] [2023-02-16 01:52:56,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:52:56,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28018281] [2023-02-16 01:52:56,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28018281] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:52:56,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:52:56,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 01:52:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488424743] [2023-02-16 01:52:56,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:52:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:52:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:52:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:52:56,348 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-02-16 01:52:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:56,363 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-02-16 01:52:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 01:52:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2023-02-16 01:52:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:56,365 INFO L225 Difference]: With dead ends: 30 [2023-02-16 01:52:56,365 INFO L226 Difference]: Without dead ends: 23 [2023-02-16 01:52:56,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:52:56,366 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:56,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-16 01:52:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-16 01:52:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2023-02-16 01:52:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-02-16 01:52:56,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-02-16 01:52:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:56,372 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-02-16 01:52:56,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-02-16 01:52:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-02-16 01:52:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 01:52:56,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:56,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:56,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:56,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2023-02-16 01:52:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:56,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606589576] [2023-02-16 01:52:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:56,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:56,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806660792] [2023-02-16 01:52:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:56,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:56,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:56,611 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) [2023-02-16 01:52:56,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:52:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 01:52:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:56,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:52:56,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606589576] [2023-02-16 01:52:56,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:52:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806660792] [2023-02-16 01:52:56,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806660792] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:52:56,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:52:56,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 01:52:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558095127] [2023-02-16 01:52:56,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:52:56,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 01:52:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 01:52:56,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:52:56,780 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-16 01:52:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:56,833 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-02-16 01:52:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:52:56,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2023-02-16 01:52:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:56,835 INFO L225 Difference]: With dead ends: 31 [2023-02-16 01:52:56,835 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 01:52:56,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-16 01:52:56,836 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:56,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 01:52:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-16 01:52:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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) [2023-02-16 01:52:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-16 01:52:56,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2023-02-16 01:52:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:56,848 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-16 01:52:56,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-16 01:52:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-16 01:52:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 01:52:56,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:56,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:56,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:57,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:57,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1647533572, now seen corresponding path program 1 times [2023-02-16 01:52:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017818054] [2023-02-16 01:52:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:57,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:57,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102318684] [2023-02-16 01:52:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:57,076 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) [2023-02-16 01:52:57,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:52:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:52:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:52:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:57,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017818054] [2023-02-16 01:52:57,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:52:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102318684] [2023-02-16 01:52:57,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102318684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:52:57,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:52:57,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-02-16 01:52:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135512975] [2023-02-16 01:52:57,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:52:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 01:52:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 01:52:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:52:57,186 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2023-02-16 01:52:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:57,257 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-02-16 01:52:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 01:52:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 13 [2023-02-16 01:52:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:57,259 INFO L225 Difference]: With dead ends: 62 [2023-02-16 01:52:57,259 INFO L226 Difference]: Without dead ends: 50 [2023-02-16 01:52:57,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:52:57,261 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:57,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 107 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-16 01:52:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2023-02-16 01:52:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 31 states have internal predecessors, (39), 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) [2023-02-16 01:52:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-02-16 01:52:57,268 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 13 [2023-02-16 01:52:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:57,268 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-02-16 01:52:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2023-02-16 01:52:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-02-16 01:52:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:52:57,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:57,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:57,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:57,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:57,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -791761799, now seen corresponding path program 1 times [2023-02-16 01:52:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:57,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309068609] [2023-02-16 01:52:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:57,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902013219] [2023-02-16 01:52:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:57,494 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) [2023-02-16 01:52:57,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:52:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 01:52:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:57,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:52:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:57,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:57,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309068609] [2023-02-16 01:52:57,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:52:57,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902013219] [2023-02-16 01:52:57,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902013219] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:52:57,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:52:57,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-02-16 01:52:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900911349] [2023-02-16 01:52:57,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:52:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 01:52:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 01:52:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-16 01:52:57,608 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2023-02-16 01:52:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:57,704 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2023-02-16 01:52:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 01:52:57,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 14 [2023-02-16 01:52:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:57,709 INFO L225 Difference]: With dead ends: 87 [2023-02-16 01:52:57,709 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 01:52:57,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:52:57,711 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:57,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 122 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:52:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 01:52:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-16 01:52:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 62 states have internal predecessors, (80), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 01:52:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2023-02-16 01:52:57,736 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 14 [2023-02-16 01:52:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:57,736 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2023-02-16 01:52:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2023-02-16 01:52:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2023-02-16 01:52:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:52:57,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:57,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:57,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:57,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:57,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash -789974339, now seen corresponding path program 1 times [2023-02-16 01:52:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:57,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517172255] [2023-02-16 01:52:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:57,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:57,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:57,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620034177] [2023-02-16 01:52:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:57,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:57,956 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) [2023-02-16 01:52:57,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:52:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:58,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 01:52:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:52:58,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:52:58,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517172255] [2023-02-16 01:52:58,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:52:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620034177] [2023-02-16 01:52:58,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620034177] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:52:58,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:52:58,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 01:52:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184820716] [2023-02-16 01:52:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:52:58,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:52:58,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:52:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:52:58,056 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-16 01:52:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:58,095 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2023-02-16 01:52:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 01:52:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2023-02-16 01:52:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:58,099 INFO L225 Difference]: With dead ends: 117 [2023-02-16 01:52:58,100 INFO L226 Difference]: Without dead ends: 111 [2023-02-16 01:52:58,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:52:58,106 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:58,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 50 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-16 01:52:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2023-02-16 01:52:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 87 states have internal predecessors, (107), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 01:52:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2023-02-16 01:52:58,124 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 14 [2023-02-16 01:52:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:58,124 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2023-02-16 01:52:58,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-16 01:52:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2023-02-16 01:52:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 01:52:58,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:58,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:58,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:58,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:58,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2118336314, now seen corresponding path program 1 times [2023-02-16 01:52:58,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:58,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637385132] [2023-02-16 01:52:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:58,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:58,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014102442] [2023-02-16 01:52:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:58,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:58,347 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) [2023-02-16 01:52:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:52:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:58,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:52:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:58,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 01:52:58,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:52:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637385132] [2023-02-16 01:52:58,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:52:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014102442] [2023-02-16 01:52:58,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014102442] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:52:58,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:52:58,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:52:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776408165] [2023-02-16 01:52:58,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:52:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 01:52:58,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:52:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 01:52:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:52:58,417 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-02-16 01:52:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:52:58,434 INFO L93 Difference]: Finished difference Result 176 states and 212 transitions. [2023-02-16 01:52:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 01:52:58,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20 [2023-02-16 01:52:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:52:58,437 INFO L225 Difference]: With dead ends: 176 [2023-02-16 01:52:58,437 INFO L226 Difference]: Without dead ends: 87 [2023-02-16 01:52:58,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 01:52:58,439 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:52:58,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:52:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-16 01:52:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-16 01:52:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 72 states have internal predecessors, (88), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-16 01:52:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2023-02-16 01:52:58,447 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 20 [2023-02-16 01:52:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:52:58,447 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2023-02-16 01:52:58,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-02-16 01:52:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2023-02-16 01:52:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 01:52:58,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:52:58,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:52:58,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 01:52:58,657 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,SelfDestructingSolverStorable7 [2023-02-16 01:52:58,658 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:52:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:52:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1149777120, now seen corresponding path program 1 times [2023-02-16 01:52:58,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:52:58,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067131631] [2023-02-16 01:52:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:58,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:52:58,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:52:58,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827104473] [2023-02-16 01:52:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:52:58,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:52:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:52:58,670 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) [2023-02-16 01:52:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:52:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:52:58,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 01:52:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:52:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:52:59,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:53:54,290 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:54:21,605 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= .cse0 (mod (+ (* 2 |c_ULTIMATE.start_main_~q~0#1| .cse1) |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) (not (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 2 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~b~0#1|)) 4294967296))) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse2)) (<= (* 2 .cse1) .cse2))) is different from true [2023-02-16 01:54:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-16 01:54:46,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:54:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067131631] [2023-02-16 01:54:46,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:54:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827104473] [2023-02-16 01:54:46,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827104473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:54:46,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:54:46,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-02-16 01:54:46,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551718423] [2023-02-16 01:54:46,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:54:46,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 01:54:46,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:54:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 01:54:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=240, Unknown=2, NotChecked=32, Total=342 [2023-02-16 01:54:46,954 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:54:50,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:54:52,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:54:54,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:54:56,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:54:59,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:55:01,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:55:03,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:55:05,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:55:09,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:55:12,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:55:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:55:19,688 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2023-02-16 01:55:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 01:55:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 4 states have call successors, (4), 3 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 23 [2023-02-16 01:55:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:55:19,691 INFO L225 Difference]: With dead ends: 168 [2023-02-16 01:55:19,691 INFO L226 Difference]: Without dead ends: 113 [2023-02-16 01:55:19,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=104, Invalid=360, Unknown=2, NotChecked=40, Total=506 [2023-02-16 01:55:19,692 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 24 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2023-02-16 01:55:19,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 164 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 237 Invalid, 8 Unknown, 50 Unchecked, 28.7s Time] [2023-02-16 01:55:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-16 01:55:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2023-02-16 01:55:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 83 states have (on average 1.180722891566265) internal successors, (98), 86 states have internal predecessors, (98), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:55:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2023-02-16 01:55:19,706 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 23 [2023-02-16 01:55:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:55:19,706 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2023-02-16 01:55:19,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:55:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2023-02-16 01:55:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 01:55:19,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:55:19,708 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:55:19,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:55:19,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:55:19,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:55:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:55:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1351972064, now seen corresponding path program 2 times [2023-02-16 01:55:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:55:19,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270206502] [2023-02-16 01:55:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:55:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:55:19,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:55:19,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735019243] [2023-02-16 01:55:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:55:19,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:55:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:55:19,922 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) [2023-02-16 01:55:19,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:55:19,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:55:19,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:55:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 01:55:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:55:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 01:55:20,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:55:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:55:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270206502] [2023-02-16 01:55:29,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:55:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735019243] [2023-02-16 01:55:29,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735019243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:55:29,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:55:29,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-02-16 01:55:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775696815] [2023-02-16 01:55:29,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:55:29,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 01:55:29,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:55:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 01:55:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=122, Unknown=3, NotChecked=0, Total=156 [2023-02-16 01:55:29,239 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-16 01:55:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:55:29,923 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2023-02-16 01:55:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:55:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 29 [2023-02-16 01:55:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:55:29,924 INFO L225 Difference]: With dead ends: 118 [2023-02-16 01:55:29,924 INFO L226 Difference]: Without dead ends: 115 [2023-02-16 01:55:29,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=44, Invalid=163, Unknown=3, NotChecked=0, Total=210 [2023-02-16 01:55:29,925 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:55:29,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 75 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:55:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-16 01:55:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2023-02-16 01:55:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 78 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 01:55:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2023-02-16 01:55:29,941 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 29 [2023-02-16 01:55:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:55:29,941 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2023-02-16 01:55:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-16 01:55:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2023-02-16 01:55:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 01:55:29,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:55:29,942 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 01:55:29,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 01:55:30,148 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,SelfDestructingSolverStorable9 [2023-02-16 01:55:30,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:55:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:55:30,149 INFO L85 PathProgramCache]: Analyzing trace with hash -815549923, now seen corresponding path program 3 times [2023-02-16 01:55:30,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:55:30,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254334120] [2023-02-16 01:55:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:55:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:55:30,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:55:30,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852133444] [2023-02-16 01:55:30,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:55:30,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:55:30,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:55:30,159 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) [2023-02-16 01:55:30,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 01:55:36,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:55:36,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:55:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 01:55:36,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:55:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:55:36,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:55:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:55:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:55:36,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254334120] [2023-02-16 01:55:36,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:55:36,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852133444] [2023-02-16 01:55:36,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852133444] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:55:36,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:55:36,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-02-16 01:55:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004218386] [2023-02-16 01:55:36,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:55:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 01:55:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:55:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 01:55:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:55:36,669 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:55:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:55:36,913 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2023-02-16 01:55:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 01:55:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2023-02-16 01:55:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:55:36,914 INFO L225 Difference]: With dead ends: 128 [2023-02-16 01:55:36,914 INFO L226 Difference]: Without dead ends: 75 [2023-02-16 01:55:36,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:55:36,915 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:55:36,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:55:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-16 01:55:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2023-02-16 01:55:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-16 01:55:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2023-02-16 01:55:36,929 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 32 [2023-02-16 01:55:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:55:36,929 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2023-02-16 01:55:36,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:55:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2023-02-16 01:55:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 01:55:36,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:55:36,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-16 01:55:36,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 01:55:37,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 01:55:37,144 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:55:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:55:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1289196803, now seen corresponding path program 4 times [2023-02-16 01:55:37,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:55:37,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41578717] [2023-02-16 01:55:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:55:37,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:55:37,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:55:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080427981] [2023-02-16 01:55:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:55:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:55:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:55:37,158 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:55:37,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 01:55:37,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:55:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:55:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-16 01:55:37,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:55:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:55:37,819 INFO L328 TraceCheckSpWp]: Computing backward predicates...