./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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/uthash-2.0.2/uthash_JEN_test4-2.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 2c8bfc4504f1d1d767281638f115bf6ca8337de4769381189ae1d6a9b301298b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 23:19:56,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 23:19:56,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 23:19:56,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 23:19:56,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 23:19:56,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 23:19:56,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 23:19:56,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 23:19:56,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 23:19:56,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 23:19:56,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 23:19:56,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 23:19:56,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 23:19:56,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 23:19:56,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 23:19:56,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 23:19:56,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 23:19:56,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 23:19:56,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 23:19:56,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 23:19:56,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 23:19:56,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 23:19:56,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 23:19:56,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 23:19:56,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 23:19:56,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 23:19:56,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 23:19:56,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 23:19:56,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 23:19:56,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 23:19:56,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 23:19:56,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 23:19:56,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 23:19:56,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 23:19:56,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 23:19:56,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 23:19:56,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 23:19:56,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 23:19:56,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 23:19:56,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 23:19:56,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 23:19:56,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-06 23:19:56,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 23:19:56,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 23:19:56,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 23:19:56,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 23:19:56,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 23:19:56,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 23:19:56,165 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 23:19:56,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 23:19:56,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-06 23:19:56,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 23:19:56,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-06 23:19:56,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 23:19:56,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 23:19:56,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 23:19:56,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 23:19:56,167 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-06 23:19:56,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 23:19:56,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 23:19:56,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 23:19:56,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 23:19:56,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 23:19:56,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 23:19:56,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 23:19:56,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 23:19:56,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 23:19:56,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 23:19:56,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 23:19:56,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 23:19:56,170 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 23:19:56,170 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 23:19:56,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 23:19:56,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 23:19:56,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c8bfc4504f1d1d767281638f115bf6ca8337de4769381189ae1d6a9b301298b [2021-11-06 23:19:56,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 23:19:56,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 23:19:56,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 23:19:56,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 23:19:56,398 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 23:19:56,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i [2021-11-06 23:19:56,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31c5d314/fc6e31c89af444d6b9f72f7dee125466/FLAG1ee565e51 [2021-11-06 23:19:56,939 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 23:19:56,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i [2021-11-06 23:19:56,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31c5d314/fc6e31c89af444d6b9f72f7dee125466/FLAG1ee565e51 [2021-11-06 23:19:57,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e31c5d314/fc6e31c89af444d6b9f72f7dee125466 [2021-11-06 23:19:57,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 23:19:57,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 23:19:57,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 23:19:57,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 23:19:57,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 23:19:57,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:19:57" (1/1) ... [2021-11-06 23:19:57,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f8ca5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:57, skipping insertion in model container [2021-11-06 23:19:57,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:19:57" (1/1) ... [2021-11-06 23:19:57,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 23:19:57,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 23:19:57,787 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i[33021,33034] [2021-11-06 23:19:57,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 23:19:57,921 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 23:19:57,946 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i[33021,33034] [2021-11-06 23:19:58,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 23:19:58,072 INFO L208 MainTranslator]: Completed translation [2021-11-06 23:19:58,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58 WrapperNode [2021-11-06 23:19:58,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 23:19:58,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 23:19:58,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 23:19:58,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 23:19:58,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 23:19:58,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 23:19:58,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 23:19:58,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 23:19:58,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 23:19:58,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 23:19:58,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 23:19:58,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 23:19:58,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (1/1) ... [2021-11-06 23:19:58,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 23:19:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:19:58,363 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) [2021-11-06 23:19:58,385 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 [2021-11-06 23:19:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 23:19:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 23:19:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 23:19:58,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 23:19:59,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 23:19:59,795 INFO L299 CfgBuilder]: Removed 107 assume(true) statements. [2021-11-06 23:19:59,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:19:59 BoogieIcfgContainer [2021-11-06 23:19:59,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 23:19:59,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 23:19:59,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 23:19:59,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 23:19:59,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:19:57" (1/3) ... [2021-11-06 23:19:59,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e17ce58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:19:59, skipping insertion in model container [2021-11-06 23:19:59,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:19:58" (2/3) ... [2021-11-06 23:19:59,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e17ce58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:19:59, skipping insertion in model container [2021-11-06 23:19:59,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:19:59" (3/3) ... [2021-11-06 23:19:59,804 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test4-2.i [2021-11-06 23:19:59,808 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 23:19:59,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-06 23:19:59,850 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 23:19:59,855 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 23:19:59,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-06 23:19:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 250 states, 239 states have (on average 1.7238493723849373) internal successors, (412), 249 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:19:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-06 23:19:59,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:19:59,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:19:59,874 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:19:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:19:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash 889550569, now seen corresponding path program 1 times [2021-11-06 23:19:59,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:19:59,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981750211] [2021-11-06 23:19:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:19:59,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:19:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:00,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:00,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981750211] [2021-11-06 23:20:00,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981750211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:00,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:00,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 23:20:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790885576] [2021-11-06 23:20:00,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 23:20:00,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:00,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 23:20:00,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 23:20:00,026 INFO L87 Difference]: Start difference. First operand has 250 states, 239 states have (on average 1.7238493723849373) internal successors, (412), 249 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:00,073 INFO L93 Difference]: Finished difference Result 498 states and 822 transitions. [2021-11-06 23:20:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 23:20:00,075 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-06 23:20:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:00,087 INFO L225 Difference]: With dead ends: 498 [2021-11-06 23:20:00,087 INFO L226 Difference]: Without dead ends: 217 [2021-11-06 23:20:00,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 23:20:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-06 23:20:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-06 23:20:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 207 states have (on average 1.3623188405797102) internal successors, (282), 216 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 282 transitions. [2021-11-06 23:20:00,142 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 282 transitions. Word has length 8 [2021-11-06 23:20:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:00,142 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 282 transitions. [2021-11-06 23:20:00,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 282 transitions. [2021-11-06 23:20:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-06 23:20:00,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:00,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:00,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 23:20:00,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 921152950, now seen corresponding path program 1 times [2021-11-06 23:20:00,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:00,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953914675] [2021-11-06 23:20:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:00,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:00,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:00,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953914675] [2021-11-06 23:20:00,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953914675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:00,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:00,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:20:00,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650133555] [2021-11-06 23:20:00,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:20:00,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:20:00,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:00,207 INFO L87 Difference]: Start difference. First operand 217 states and 282 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:00,234 INFO L93 Difference]: Finished difference Result 432 states and 562 transitions. [2021-11-06 23:20:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:20:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-06 23:20:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:00,237 INFO L225 Difference]: With dead ends: 432 [2021-11-06 23:20:00,237 INFO L226 Difference]: Without dead ends: 387 [2021-11-06 23:20:00,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-06 23:20:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 218. [2021-11-06 23:20:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 208 states have (on average 1.3605769230769231) internal successors, (283), 217 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 283 transitions. [2021-11-06 23:20:00,248 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 283 transitions. Word has length 8 [2021-11-06 23:20:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:00,249 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 283 transitions. [2021-11-06 23:20:00,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 283 transitions. [2021-11-06 23:20:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 23:20:00,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:00,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:00,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 23:20:00,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:00,253 INFO L85 PathProgramCache]: Analyzing trace with hash -137963571, now seen corresponding path program 1 times [2021-11-06 23:20:00,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:00,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429213016] [2021-11-06 23:20:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:00,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:00,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:00,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782678052] [2021-11-06 23:20:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:00,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:00,295 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) [2021-11-06 23:20:00,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 23:20:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:20:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:00,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:00,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429213016] [2021-11-06 23:20:00,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:00,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782678052] [2021-11-06 23:20:00,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782678052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:00,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:00,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:20:00,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616678962] [2021-11-06 23:20:00,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:20:00,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:20:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:00,785 INFO L87 Difference]: Start difference. First operand 218 states and 283 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:00,863 INFO L93 Difference]: Finished difference Result 454 states and 594 transitions. [2021-11-06 23:20:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:20:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-06 23:20:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:00,865 INFO L225 Difference]: With dead ends: 454 [2021-11-06 23:20:00,865 INFO L226 Difference]: Without dead ends: 239 [2021-11-06 23:20:00,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-06 23:20:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2021-11-06 23:20:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 228 states have (on average 1.3289473684210527) internal successors, (303), 237 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 303 transitions. [2021-11-06 23:20:00,883 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 303 transitions. Word has length 106 [2021-11-06 23:20:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:00,884 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 303 transitions. [2021-11-06 23:20:00,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 303 transitions. [2021-11-06 23:20:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 23:20:00,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:00,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:00,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:01,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:01,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 62310097, now seen corresponding path program 1 times [2021-11-06 23:20:01,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:01,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147018667] [2021-11-06 23:20:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:01,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:01,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:01,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216833297] [2021-11-06 23:20:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:01,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:01,142 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) [2021-11-06 23:20:01,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 23:20:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:20:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:01,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:01,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147018667] [2021-11-06 23:20:01,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:01,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216833297] [2021-11-06 23:20:01,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216833297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:01,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:01,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:20:01,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916475171] [2021-11-06 23:20:01,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:20:01,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:20:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:01,635 INFO L87 Difference]: Start difference. First operand 238 states and 303 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:01,694 INFO L93 Difference]: Finished difference Result 494 states and 634 transitions. [2021-11-06 23:20:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:20:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-06 23:20:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:01,698 INFO L225 Difference]: With dead ends: 494 [2021-11-06 23:20:01,698 INFO L226 Difference]: Without dead ends: 259 [2021-11-06 23:20:01,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-06 23:20:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2021-11-06 23:20:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 248 states have (on average 1.3024193548387097) internal successors, (323), 257 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 323 transitions. [2021-11-06 23:20:01,717 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 323 transitions. Word has length 106 [2021-11-06 23:20:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:01,718 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 323 transitions. [2021-11-06 23:20:01,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 323 transitions. [2021-11-06 23:20:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 23:20:01,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:01,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:01,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:01,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-06 23:20:01,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:01,946 INFO L85 PathProgramCache]: Analyzing trace with hash -426500019, now seen corresponding path program 1 times [2021-11-06 23:20:01,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:01,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907767672] [2021-11-06 23:20:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:01,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:01,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:01,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252773185] [2021-11-06 23:20:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:01,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:01,976 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) [2021-11-06 23:20:01,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 23:20:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:02,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:20:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:02,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:02,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907767672] [2021-11-06 23:20:02,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:02,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252773185] [2021-11-06 23:20:02,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252773185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:02,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:02,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:20:02,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8713761] [2021-11-06 23:20:02,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:20:02,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:20:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:20:02,430 INFO L87 Difference]: Start difference. First operand 258 states and 323 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:02,493 INFO L93 Difference]: Finished difference Result 505 states and 635 transitions. [2021-11-06 23:20:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:20:02,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-06 23:20:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:02,495 INFO L225 Difference]: With dead ends: 505 [2021-11-06 23:20:02,495 INFO L226 Difference]: Without dead ends: 250 [2021-11-06 23:20:02,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:20:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-06 23:20:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2021-11-06 23:20:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 234 states have (on average 1.2905982905982907) internal successors, (302), 243 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2021-11-06 23:20:02,501 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 106 [2021-11-06 23:20:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:02,501 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2021-11-06 23:20:02,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2021-11-06 23:20:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 23:20:02,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:02,503 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:02,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:02,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1791075329, now seen corresponding path program 1 times [2021-11-06 23:20:02,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:02,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820230516] [2021-11-06 23:20:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:02,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:02,737 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:02,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251717323] [2021-11-06 23:20:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:02,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:02,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:02,739 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) [2021-11-06 23:20:02,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 23:20:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:20:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:03,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:03,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820230516] [2021-11-06 23:20:03,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:03,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251717323] [2021-11-06 23:20:03,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251717323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:03,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:03,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:20:03,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529626497] [2021-11-06 23:20:03,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:20:03,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:20:03,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:20:03,195 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:03,256 INFO L93 Difference]: Finished difference Result 566 states and 702 transitions. [2021-11-06 23:20:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:20:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-06 23:20:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:03,258 INFO L225 Difference]: With dead ends: 566 [2021-11-06 23:20:03,258 INFO L226 Difference]: Without dead ends: 325 [2021-11-06 23:20:03,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:20:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-06 23:20:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 230. [2021-11-06 23:20:03,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 220 states have (on average 1.2772727272727273) internal successors, (281), 229 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 281 transitions. [2021-11-06 23:20:03,264 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 281 transitions. Word has length 106 [2021-11-06 23:20:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:03,265 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 281 transitions. [2021-11-06 23:20:03,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 281 transitions. [2021-11-06 23:20:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 23:20:03,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:03,266 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:03,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:03,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:03,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:03,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1369189005, now seen corresponding path program 1 times [2021-11-06 23:20:03,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:03,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502977227] [2021-11-06 23:20:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:03,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:03,497 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:03,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288016161] [2021-11-06 23:20:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:03,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:03,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:03,499 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) [2021-11-06 23:20:03,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 23:20:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 23:20:03,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:03,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:03,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502977227] [2021-11-06 23:20:03,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:03,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288016161] [2021-11-06 23:20:03,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288016161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 23:20:03,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 23:20:03,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-06 23:20:03,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235963877] [2021-11-06 23:20:03,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:20:03,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:20:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:20:03,992 INFO L87 Difference]: Start difference. First operand 230 states and 281 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:04,018 INFO L93 Difference]: Finished difference Result 638 states and 780 transitions. [2021-11-06 23:20:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 23:20:04,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-06 23:20:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:04,021 INFO L225 Difference]: With dead ends: 638 [2021-11-06 23:20:04,021 INFO L226 Difference]: Without dead ends: 593 [2021-11-06 23:20:04,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:20:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-06 23:20:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 412. [2021-11-06 23:20:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 402 states have (on average 1.2512437810945274) internal successors, (503), 411 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 503 transitions. [2021-11-06 23:20:04,031 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 503 transitions. Word has length 106 [2021-11-06 23:20:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:04,032 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 503 transitions. [2021-11-06 23:20:04,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 503 transitions. [2021-11-06 23:20:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-06 23:20:04,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:04,034 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:04,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:04,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:04,260 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash 548829604, now seen corresponding path program 2 times [2021-11-06 23:20:04,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:04,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472105741] [2021-11-06 23:20:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:04,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:04,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:04,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184500521] [2021-11-06 23:20:04,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:20:04,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:04,283 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) [2021-11-06 23:20:04,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 23:20:04,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 23:20:04,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:20:04,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 23:20:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-06 23:20:05,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:05,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472105741] [2021-11-06 23:20:05,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:05,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184500521] [2021-11-06 23:20:05,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184500521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:05,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:05,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 23:20:05,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685046979] [2021-11-06 23:20:05,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 23:20:05,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:05,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 23:20:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:20:05,605 INFO L87 Difference]: Start difference. First operand 412 states and 503 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:05,910 INFO L93 Difference]: Finished difference Result 677 states and 831 transitions. [2021-11-06 23:20:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:20:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-06 23:20:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:05,913 INFO L225 Difference]: With dead ends: 677 [2021-11-06 23:20:05,913 INFO L226 Difference]: Without dead ends: 410 [2021-11-06 23:20:05,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 23:20:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-06 23:20:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-06 23:20:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 400 states have (on average 1.25) internal successors, (500), 409 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 500 transitions. [2021-11-06 23:20:05,929 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 500 transitions. Word has length 204 [2021-11-06 23:20:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:05,930 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 500 transitions. [2021-11-06 23:20:05,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 500 transitions. [2021-11-06 23:20:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-06 23:20:05,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:05,932 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:05,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:06,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:06,157 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash -7696284, now seen corresponding path program 1 times [2021-11-06 23:20:06,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:06,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433523279] [2021-11-06 23:20:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:06,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:06,183 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:06,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106805691] [2021-11-06 23:20:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:06,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:06,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:06,185 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) [2021-11-06 23:20:06,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 23:20:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 23:20:06,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:07,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:07,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433523279] [2021-11-06 23:20:07,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:07,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106805691] [2021-11-06 23:20:07,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106805691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 23:20:07,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 23:20:07,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-06 23:20:07,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956983604] [2021-11-06 23:20:07,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 23:20:07,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 23:20:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:20:07,202 INFO L87 Difference]: Start difference. First operand 410 states and 500 transitions. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:07,236 INFO L93 Difference]: Finished difference Result 818 states and 999 transitions. [2021-11-06 23:20:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 23:20:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-06 23:20:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:07,240 INFO L225 Difference]: With dead ends: 818 [2021-11-06 23:20:07,240 INFO L226 Difference]: Without dead ends: 773 [2021-11-06 23:20:07,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 23:20:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-06 23:20:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 592. [2021-11-06 23:20:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 582 states have (on average 1.2405498281786942) internal successors, (722), 591 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 722 transitions. [2021-11-06 23:20:07,254 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 722 transitions. Word has length 211 [2021-11-06 23:20:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:07,254 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 722 transitions. [2021-11-06 23:20:07,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:07,255 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 722 transitions. [2021-11-06 23:20:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-06 23:20:07,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:07,258 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:07,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:07,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:07,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1450675781, now seen corresponding path program 2 times [2021-11-06 23:20:07,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:07,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88884179] [2021-11-06 23:20:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:07,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:07,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:07,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041462649] [2021-11-06 23:20:07,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:20:07,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:07,522 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) [2021-11-06 23:20:07,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 23:20:08,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 23:20:08,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:20:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 23:20:08,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:08,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:08,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88884179] [2021-11-06 23:20:08,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:08,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041462649] [2021-11-06 23:20:08,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041462649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 23:20:08,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 23:20:08,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-06 23:20:08,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995077786] [2021-11-06 23:20:08,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 23:20:08,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 23:20:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 23:20:08,769 INFO L87 Difference]: Start difference. First operand 592 states and 722 transitions. Second operand has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:08,825 INFO L93 Difference]: Finished difference Result 1000 states and 1221 transitions. [2021-11-06 23:20:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 23:20:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2021-11-06 23:20:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:08,830 INFO L225 Difference]: With dead ends: 1000 [2021-11-06 23:20:08,830 INFO L226 Difference]: Without dead ends: 955 [2021-11-06 23:20:08,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 23:20:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-11-06 23:20:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 774. [2021-11-06 23:20:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 764 states have (on average 1.2356020942408377) internal successors, (944), 773 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 944 transitions. [2021-11-06 23:20:08,848 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 944 transitions. Word has length 309 [2021-11-06 23:20:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:08,849 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 944 transitions. [2021-11-06 23:20:08,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.5) internal successors, (309), 6 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 944 transitions. [2021-11-06 23:20:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-06 23:20:08,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:08,855 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:08,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-06 23:20:09,082 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1217332562, now seen corresponding path program 3 times [2021-11-06 23:20:09,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:09,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657257789] [2021-11-06 23:20:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:09,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:09,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:09,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980117143] [2021-11-06 23:20:09,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 23:20:09,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:09,105 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) [2021-11-06 23:20:09,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 23:20:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 23:20:09,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:20:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 23:20:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-06 23:20:11,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657257789] [2021-11-06 23:20:11,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:11,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980117143] [2021-11-06 23:20:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980117143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 23:20:11,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 23:20:11,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 23:20:11,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949935578] [2021-11-06 23:20:11,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 23:20:11,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 23:20:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:11,447 INFO L87 Difference]: Start difference. First operand 774 states and 944 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:11,515 INFO L93 Difference]: Finished difference Result 1490 states and 1822 transitions. [2021-11-06 23:20:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 23:20:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-11-06 23:20:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:11,521 INFO L225 Difference]: With dead ends: 1490 [2021-11-06 23:20:11,521 INFO L226 Difference]: Without dead ends: 772 [2021-11-06 23:20:11,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 23:20:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-06 23:20:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2021-11-06 23:20:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 762 states have (on average 1.2349081364829397) internal successors, (941), 771 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 941 transitions. [2021-11-06 23:20:11,540 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 941 transitions. Word has length 407 [2021-11-06 23:20:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:11,541 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 941 transitions. [2021-11-06 23:20:11,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 941 transitions. [2021-11-06 23:20:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-06 23:20:11,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:11,548 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:11,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:11,763 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2077967202, now seen corresponding path program 1 times [2021-11-06 23:20:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:11,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446802511] [2021-11-06 23:20:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:11,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:11,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:11,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446570677] [2021-11-06 23:20:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:11,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:11,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:11,794 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) [2021-11-06 23:20:11,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 23:20:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 23:20:12,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 23:20:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:13,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:13,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446802511] [2021-11-06 23:20:13,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:13,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446570677] [2021-11-06 23:20:13,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446570677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 23:20:13,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 23:20:13,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-06 23:20:13,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642106573] [2021-11-06 23:20:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 23:20:13,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 23:20:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 23:20:13,514 INFO L87 Difference]: Start difference. First operand 772 states and 941 transitions. Second operand has 7 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:13,578 INFO L93 Difference]: Finished difference Result 1180 states and 1440 transitions. [2021-11-06 23:20:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 23:20:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 414 [2021-11-06 23:20:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:13,583 INFO L225 Difference]: With dead ends: 1180 [2021-11-06 23:20:13,583 INFO L226 Difference]: Without dead ends: 1135 [2021-11-06 23:20:13,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 23:20:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-11-06 23:20:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 954. [2021-11-06 23:20:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 944 states have (on average 1.2319915254237288) internal successors, (1163), 953 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1163 transitions. [2021-11-06 23:20:13,606 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1163 transitions. Word has length 414 [2021-11-06 23:20:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:13,607 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1163 transitions. [2021-11-06 23:20:13,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1163 transitions. [2021-11-06 23:20:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-11-06 23:20:13,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:13,616 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:13,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:13,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-06 23:20:13,831 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1990200007, now seen corresponding path program 2 times [2021-11-06 23:20:13,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:13,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081999736] [2021-11-06 23:20:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:13,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:13,851 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:13,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794546958] [2021-11-06 23:20:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 23:20:13,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:13,853 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) [2021-11-06 23:20:13,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 23:20:14,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 23:20:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 23:20:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 23:20:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 23:20:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 23:20:15,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 23:20:15,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081999736] [2021-11-06 23:20:15,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 23:20:15,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794546958] [2021-11-06 23:20:15,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794546958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 23:20:15,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-06 23:20:15,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-06 23:20:15,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190204673] [2021-11-06 23:20:15,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 23:20:15,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 23:20:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 23:20:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 23:20:15,885 INFO L87 Difference]: Start difference. First operand 954 states and 1163 transitions. Second operand has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 23:20:15,992 INFO L93 Difference]: Finished difference Result 1362 states and 1662 transitions. [2021-11-06 23:20:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 23:20:15,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 512 [2021-11-06 23:20:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 23:20:15,998 INFO L225 Difference]: With dead ends: 1362 [2021-11-06 23:20:15,998 INFO L226 Difference]: Without dead ends: 1317 [2021-11-06 23:20:15,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 23:20:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-11-06 23:20:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1136. [2021-11-06 23:20:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1126 states have (on average 1.2300177619893429) internal successors, (1385), 1135 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1385 transitions. [2021-11-06 23:20:16,069 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1385 transitions. Word has length 512 [2021-11-06 23:20:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 23:20:16,070 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1385 transitions. [2021-11-06 23:20:16,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 23:20:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1385 transitions. [2021-11-06 23:20:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2021-11-06 23:20:16,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 23:20:16,076 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 23:20:16,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-06 23:20:16,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-06 23:20:16,277 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 23:20:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 23:20:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1529530032, now seen corresponding path program 3 times [2021-11-06 23:20:16,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 23:20:16,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978578829] [2021-11-06 23:20:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 23:20:16,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 23:20:16,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 23:20:16,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334044502] [2021-11-06 23:20:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 23:20:16,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 23:20:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 23:20:16,326 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) [2021-11-06 23:20:16,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15