./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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_SAX_test3-1.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 a379a11019678fc2a367efcf212f49fd3083d5f94e928c550866b32de723f686 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 15:30:06,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 15:30:06,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 15:30:06,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 15:30:06,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 15:30:06,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 15:30:06,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 15:30:06,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 15:30:06,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 15:30:06,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 15:30:06,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 15:30:06,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 15:30:06,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 15:30:06,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 15:30:06,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 15:30:06,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 15:30:06,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 15:30:06,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 15:30:06,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 15:30:06,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 15:30:06,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 15:30:06,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 15:30:06,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 15:30:06,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 15:30:06,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 15:30:06,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 15:30:06,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 15:30:06,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 15:30:06,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 15:30:06,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 15:30:06,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 15:30:06,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 15:30:06,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 15:30:06,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 15:30:06,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 15:30:06,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 15:30:06,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 15:30:06,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 15:30:06,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 15:30:06,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 15:30:06,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 15:30:06,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-17 15:30:06,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 15:30:06,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 15:30:06,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 15:30:06,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 15:30:06,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 15:30:06,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 15:30:06,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 15:30:06,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 15:30:06,273 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 15:30:06,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 15:30:06,274 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-17 15:30:06,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 15:30:06,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-17 15:30:06,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 15:30:06,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 15:30:06,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 15:30:06,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 15:30:06,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-17 15:30:06,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 15:30:06,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 15:30:06,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 15:30:06,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 15:30:06,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 15:30:06,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 15:30:06,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:30:06,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 15:30:06,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 15:30:06,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 15:30:06,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 15:30:06,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 15:30:06,278 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 15:30:06,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 15:30:06,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 15:30:06,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 15:30:06,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a379a11019678fc2a367efcf212f49fd3083d5f94e928c550866b32de723f686 [2021-11-17 15:30:06,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 15:30:06,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 15:30:06,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 15:30:06,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 15:30:06,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 15:30:06,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i [2021-11-17 15:30:06,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b66791c/7a2e2b0c96474c1aa674a736ec73d180/FLAG395e8c758 [2021-11-17 15:30:07,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 15:30:07,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i [2021-11-17 15:30:07,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b66791c/7a2e2b0c96474c1aa674a736ec73d180/FLAG395e8c758 [2021-11-17 15:30:07,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b66791c/7a2e2b0c96474c1aa674a736ec73d180 [2021-11-17 15:30:07,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 15:30:07,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 15:30:07,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 15:30:07,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 15:30:07,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 15:30:07,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c43c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07, skipping insertion in model container [2021-11-17 15:30:07,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 15:30:07,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 15:30:07,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[33021,33034] [2021-11-17 15:30:07,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[44590,44603] [2021-11-17 15:30:07,491 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:30:07,497 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 15:30:07,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[33021,33034] [2021-11-17 15:30:07,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-1.i[44590,44603] [2021-11-17 15:30:07,591 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 15:30:07,615 INFO L208 MainTranslator]: Completed translation [2021-11-17 15:30:07,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07 WrapperNode [2021-11-17 15:30:07,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 15:30:07,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 15:30:07,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 15:30:07,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 15:30:07,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,674 INFO L137 Inliner]: procedures = 177, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1026 [2021-11-17 15:30:07,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 15:30:07,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 15:30:07,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 15:30:07,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 15:30:07,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 15:30:07,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 15:30:07,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 15:30:07,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 15:30:07,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (1/1) ... [2021-11-17 15:30:07,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 15:30:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:07,765 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) [2021-11-17 15:30:07,809 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 [2021-11-17 15:30:07,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 15:30:07,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-17 15:30:07,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-17 15:30:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 15:30:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-17 15:30:07,824 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-17 15:30:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 15:30:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 15:30:07,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 15:30:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 15:30:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 15:30:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 15:30:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 15:30:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 15:30:07,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 15:30:07,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 15:30:08,027 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 15:30:08,028 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 15:30:08,658 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 15:30:08,664 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 15:30:08,664 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-17 15:30:08,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:30:08 BoogieIcfgContainer [2021-11-17 15:30:08,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 15:30:08,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 15:30:08,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 15:30:08,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 15:30:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:30:07" (1/3) ... [2021-11-17 15:30:08,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e199bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:08, skipping insertion in model container [2021-11-17 15:30:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:07" (2/3) ... [2021-11-17 15:30:08,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e199bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:08, skipping insertion in model container [2021-11-17 15:30:08,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:30:08" (3/3) ... [2021-11-17 15:30:08,672 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test3-1.i [2021-11-17 15:30:08,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 15:30:08,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-17 15:30:08,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 15:30:08,709 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 [2021-11-17 15:30:08,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-17 15:30:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 202 states, 189 states have (on average 1.693121693121693) internal successors, (320), 196 states have internal predecessors, (320), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-17 15:30:08,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:08,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:08,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -858857507, now seen corresponding path program 1 times [2021-11-17 15:30:08,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:08,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108695108] [2021-11-17 15:30:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:08,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:30:08,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:08,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108695108] [2021-11-17 15:30:08,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108695108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:08,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:08,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-17 15:30:08,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539044778] [2021-11-17 15:30:08,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:08,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-17 15:30:08,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-17 15:30:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-17 15:30:08,886 INFO L87 Difference]: Start difference. First operand has 202 states, 189 states have (on average 1.693121693121693) internal successors, (320), 196 states have internal predecessors, (320), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-17 15:30:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:08,932 INFO L93 Difference]: Finished difference Result 402 states and 675 transitions. [2021-11-17 15:30:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-17 15:30:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-17 15:30:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:08,943 INFO L225 Difference]: With dead ends: 402 [2021-11-17 15:30:08,943 INFO L226 Difference]: Without dead ends: 198 [2021-11-17 15:30:08,947 INFO L932 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 [2021-11-17 15:30:08,950 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:08,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-17 15:30:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-17 15:30:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3279569892473118) internal successors, (247), 192 states have internal predecessors, (247), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2021-11-17 15:30:08,996 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 9 [2021-11-17 15:30:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:08,997 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2021-11-17 15:30:08,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-17 15:30:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2021-11-17 15:30:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-17 15:30:08,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:08,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:08,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 15:30:08,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1463774514, now seen corresponding path program 1 times [2021-11-17 15:30:09,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:09,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926395861] [2021-11-17 15:30:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:09,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:30:09,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:09,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926395861] [2021-11-17 15:30:09,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926395861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:09,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:09,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:30:09,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077599919] [2021-11-17 15:30:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:09,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:30:09,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:30:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:30:09,073 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:09,387 INFO L93 Difference]: Finished difference Result 431 states and 581 transitions. [2021-11-17 15:30:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:30:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-17 15:30:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:09,390 INFO L225 Difference]: With dead ends: 431 [2021-11-17 15:30:09,390 INFO L226 Difference]: Without dead ends: 327 [2021-11-17 15:30:09,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:09,392 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 158 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:09,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 661 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-17 15:30:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-17 15:30:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 200. [2021-11-17 15:30:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 188 states have (on average 1.324468085106383) internal successors, (249), 194 states have internal predecessors, (249), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 265 transitions. [2021-11-17 15:30:09,410 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 265 transitions. Word has length 14 [2021-11-17 15:30:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 265 transitions. [2021-11-17 15:30:09,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 265 transitions. [2021-11-17 15:30:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-17 15:30:09,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:09,413 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:09,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 15:30:09,413 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -921461318, now seen corresponding path program 1 times [2021-11-17 15:30:09,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:09,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473555378] [2021-11-17 15:30:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:09,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:09,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:09,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241034879] [2021-11-17 15:30:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:09,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:09,432 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) [2021-11-17 15:30:09,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-17 15:30:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:09,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:30:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:30:09,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:09,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473555378] [2021-11-17 15:30:09,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:09,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241034879] [2021-11-17 15:30:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241034879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:09,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:09,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:30:09,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526006215] [2021-11-17 15:30:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:09,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:30:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:30:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:30:09,829 INFO L87 Difference]: Start difference. First operand 200 states and 265 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:09,892 INFO L93 Difference]: Finished difference Result 417 states and 557 transitions. [2021-11-17 15:30:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:30:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-17 15:30:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:09,894 INFO L225 Difference]: With dead ends: 417 [2021-11-17 15:30:09,894 INFO L226 Difference]: Without dead ends: 221 [2021-11-17 15:30:09,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:30:09,896 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 9 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:09,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 471 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-17 15:30:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-11-17 15:30:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 208 states have (on average 1.2932692307692308) internal successors, (269), 214 states have internal predecessors, (269), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2021-11-17 15:30:09,905 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 66 [2021-11-17 15:30:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:09,906 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2021-11-17 15:30:09,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2021-11-17 15:30:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-17 15:30:09,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:09,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:09,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:10,115 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 [2021-11-17 15:30:10,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -568372936, now seen corresponding path program 1 times [2021-11-17 15:30:10,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:10,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651104644] [2021-11-17 15:30:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:10,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:10,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:10,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727483384] [2021-11-17 15:30:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:10,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:10,144 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) [2021-11-17 15:30:10,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-17 15:30:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:10,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:30:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:30:10,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:10,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:10,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651104644] [2021-11-17 15:30:10,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:10,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727483384] [2021-11-17 15:30:10,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727483384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:10,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:10,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:30:10,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657617344] [2021-11-17 15:30:10,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:10,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:30:10,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:30:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:30:10,404 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:10,458 INFO L93 Difference]: Finished difference Result 428 states and 558 transitions. [2021-11-17 15:30:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:30:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-17 15:30:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:10,460 INFO L225 Difference]: With dead ends: 428 [2021-11-17 15:30:10,460 INFO L226 Difference]: Without dead ends: 212 [2021-11-17 15:30:10,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:10,461 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 226 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:10,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 499 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-17 15:30:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2021-11-17 15:30:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 194 states have (on average 1.2783505154639174) internal successors, (248), 200 states have internal predecessors, (248), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2021-11-17 15:30:10,478 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 66 [2021-11-17 15:30:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2021-11-17 15:30:10,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2021-11-17 15:30:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-17 15:30:10,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:10,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:10,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:10,692 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 [2021-11-17 15:30:10,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1138787002, now seen corresponding path program 1 times [2021-11-17 15:30:10,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:10,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909238188] [2021-11-17 15:30:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:10,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:10,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:10,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074315730] [2021-11-17 15:30:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:10,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:10,718 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) [2021-11-17 15:30:10,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-17 15:30:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:10,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:30:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:30:11,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:11,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:11,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909238188] [2021-11-17 15:30:11,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:11,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074315730] [2021-11-17 15:30:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074315730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:11,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:11,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:30:11,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975489071] [2021-11-17 15:30:11,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:11,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:30:11,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:30:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:30:11,012 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:11,072 INFO L93 Difference]: Finished difference Result 532 states and 686 transitions. [2021-11-17 15:30:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:30:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-17 15:30:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:11,074 INFO L225 Difference]: With dead ends: 532 [2021-11-17 15:30:11,074 INFO L226 Difference]: Without dead ends: 330 [2021-11-17 15:30:11,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:30:11,076 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 113 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:11,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 554 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-17 15:30:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 312. [2021-11-17 15:30:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 300 states have (on average 1.27) internal successors, (381), 306 states have internal predecessors, (381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 397 transitions. [2021-11-17 15:30:11,084 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 397 transitions. Word has length 66 [2021-11-17 15:30:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:11,084 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 397 transitions. [2021-11-17 15:30:11,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 15:30:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 397 transitions. [2021-11-17 15:30:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-17 15:30:11,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:11,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:11,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:11,299 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 [2021-11-17 15:30:11,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1268606516, now seen corresponding path program 1 times [2021-11-17 15:30:11,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:11,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731828957] [2021-11-17 15:30:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:11,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:11,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:11,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892381993] [2021-11-17 15:30:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:11,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:11,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:11,318 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) [2021-11-17 15:30:11,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-17 15:30:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:30:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:11,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-17 15:30:11,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-17 15:30:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-17 15:30:11,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:11,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:11,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731828957] [2021-11-17 15:30:11,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:11,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892381993] [2021-11-17 15:30:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892381993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:11,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:11,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:30:11,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394356757] [2021-11-17 15:30:11,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:11,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:30:11,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:30:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:30:11,591 INFO L87 Difference]: Start difference. First operand 312 states and 397 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:11,813 INFO L93 Difference]: Finished difference Result 417 states and 541 transitions. [2021-11-17 15:30:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:30:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 81 [2021-11-17 15:30:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:11,815 INFO L225 Difference]: With dead ends: 417 [2021-11-17 15:30:11,815 INFO L226 Difference]: Without dead ends: 396 [2021-11-17 15:30:11,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:11,816 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 135 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:11,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 658 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-17 15:30:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-17 15:30:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 314. [2021-11-17 15:30:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 302 states have (on average 1.2682119205298013) internal successors, (383), 308 states have internal predecessors, (383), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 399 transitions. [2021-11-17 15:30:11,835 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 399 transitions. Word has length 81 [2021-11-17 15:30:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:11,835 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 399 transitions. [2021-11-17 15:30:11,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 399 transitions. [2021-11-17 15:30:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-17 15:30:11,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:11,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:11,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:12,054 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 [2021-11-17 15:30:12,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1512236935, now seen corresponding path program 1 times [2021-11-17 15:30:12,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:12,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148037639] [2021-11-17 15:30:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:12,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:12,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:12,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705292226] [2021-11-17 15:30:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:12,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:12,078 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) [2021-11-17 15:30:12,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-17 15:30:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 15:30:12,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-17 15:30:12,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:12,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:12,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148037639] [2021-11-17 15:30:12,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:12,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705292226] [2021-11-17 15:30:12,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705292226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:12,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:12,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-17 15:30:12,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672084452] [2021-11-17 15:30:12,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:12,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-17 15:30:12,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-17 15:30:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:30:12,361 INFO L87 Difference]: Start difference. First operand 314 states and 399 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:12,403 INFO L93 Difference]: Finished difference Result 521 states and 685 transitions. [2021-11-17 15:30:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-17 15:30:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-17 15:30:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:12,405 INFO L225 Difference]: With dead ends: 521 [2021-11-17 15:30:12,405 INFO L226 Difference]: Without dead ends: 356 [2021-11-17 15:30:12,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-17 15:30:12,406 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 8 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:12,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 459 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-17 15:30:12,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 354. [2021-11-17 15:30:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 342 states have (on average 1.236842105263158) internal successors, (423), 348 states have internal predecessors, (423), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 439 transitions. [2021-11-17 15:30:12,414 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 439 transitions. Word has length 111 [2021-11-17 15:30:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:12,414 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 439 transitions. [2021-11-17 15:30:12,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 439 transitions. [2021-11-17 15:30:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-17 15:30:12,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:12,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:12,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:12,633 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 [2021-11-17 15:30:12,636 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1771613111, now seen corresponding path program 1 times [2021-11-17 15:30:12,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:12,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359526984] [2021-11-17 15:30:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:12,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:12,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:12,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490485995] [2021-11-17 15:30:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:12,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:12,649 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) [2021-11-17 15:30:12,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-17 15:30:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-17 15:30:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-17 15:30:12,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:12,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:12,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359526984] [2021-11-17 15:30:12,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:12,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490485995] [2021-11-17 15:30:12,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490485995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:12,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 15:30:12,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745968479] [2021-11-17 15:30:12,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:12,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 15:30:12,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 15:30:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:12,906 INFO L87 Difference]: Start difference. First operand 354 states and 439 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:12,956 INFO L93 Difference]: Finished difference Result 536 states and 680 transitions. [2021-11-17 15:30:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:30:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-17 15:30:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:12,958 INFO L225 Difference]: With dead ends: 536 [2021-11-17 15:30:12,958 INFO L226 Difference]: Without dead ends: 331 [2021-11-17 15:30:12,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:12,960 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 110 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:12,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 586 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-17 15:30:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 326. [2021-11-17 15:30:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 314 states have (on average 1.213375796178344) internal successors, (381), 320 states have internal predecessors, (381), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2021-11-17 15:30:12,968 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 111 [2021-11-17 15:30:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:12,969 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2021-11-17 15:30:12,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2021-11-17 15:30:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-17 15:30:12,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:12,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:13,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:13,189 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 [2021-11-17 15:30:13,189 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1365745725, now seen corresponding path program 1 times [2021-11-17 15:30:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:13,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237732616] [2021-11-17 15:30:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:13,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:13,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:13,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714644816] [2021-11-17 15:30:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:13,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:13,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:13,222 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) [2021-11-17 15:30:13,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-17 15:30:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-17 15:30:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-17 15:30:13,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:13,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:13,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237732616] [2021-11-17 15:30:13,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:13,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714644816] [2021-11-17 15:30:13,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714644816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:13,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:13,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:30:13,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475107217] [2021-11-17 15:30:13,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:13,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:30:13,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:30:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:30:13,527 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:13,684 INFO L93 Difference]: Finished difference Result 720 states and 898 transitions. [2021-11-17 15:30:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-17 15:30:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-17 15:30:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:13,687 INFO L225 Difference]: With dead ends: 720 [2021-11-17 15:30:13,687 INFO L226 Difference]: Without dead ends: 442 [2021-11-17 15:30:13,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:13,688 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 446 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:13,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 514 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:30:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-17 15:30:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 410. [2021-11-17 15:30:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 398 states have (on average 1.2185929648241205) internal successors, (485), 404 states have internal predecessors, (485), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-17 15:30:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 501 transitions. [2021-11-17 15:30:13,698 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 501 transitions. Word has length 111 [2021-11-17 15:30:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:13,699 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 501 transitions. [2021-11-17 15:30:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 15:30:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 501 transitions. [2021-11-17 15:30:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-17 15:30:13,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:13,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:13,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:13,918 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 [2021-11-17 15:30:13,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1916658931, now seen corresponding path program 1 times [2021-11-17 15:30:13,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:13,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719438438] [2021-11-17 15:30:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:13,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:13,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:13,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749415284] [2021-11-17 15:30:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:13,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:13,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:13,937 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) [2021-11-17 15:30:13,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-17 15:30:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:14,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-17 15:30:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 15:30:14,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 15:30:14,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:14,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719438438] [2021-11-17 15:30:14,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:14,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749415284] [2021-11-17 15:30:14,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749415284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 15:30:14,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 15:30:14,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 15:30:14,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425184417] [2021-11-17 15:30:14,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 15:30:14,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 15:30:14,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 15:30:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 15:30:14,455 INFO L87 Difference]: Start difference. First operand 410 states and 501 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:30:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:14,479 INFO L93 Difference]: Finished difference Result 772 states and 951 transitions. [2021-11-17 15:30:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 15:30:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2021-11-17 15:30:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:14,481 INFO L225 Difference]: With dead ends: 772 [2021-11-17 15:30:14,481 INFO L226 Difference]: Without dead ends: 413 [2021-11-17 15:30:14,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 15:30:14,483 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 2 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:14,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 734 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-17 15:30:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-17 15:30:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2021-11-17 15:30:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 400 states have (on average 1.22) internal successors, (488), 407 states have internal predecessors, (488), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-17 15:30:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 505 transitions. [2021-11-17 15:30:14,492 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 505 transitions. Word has length 118 [2021-11-17 15:30:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:14,492 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 505 transitions. [2021-11-17 15:30:14,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-17 15:30:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 505 transitions. [2021-11-17 15:30:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-17 15:30:14,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:14,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:14,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:14,717 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 [2021-11-17 15:30:14,717 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1353137643, now seen corresponding path program 1 times [2021-11-17 15:30:14,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:14,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376540903] [2021-11-17 15:30:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:14,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:14,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:14,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937539150] [2021-11-17 15:30:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:14,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:14,732 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) [2021-11-17 15:30:14,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-17 15:30:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 15:30:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-17 15:30:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 15:30:15,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:30:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-17 15:30:15,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:15,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376540903] [2021-11-17 15:30:15,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:15,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937539150] [2021-11-17 15:30:15,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937539150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:30:15,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:30:15,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-17 15:30:15,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698808155] [2021-11-17 15:30:15,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:30:15,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 15:30:15,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 15:30:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-17 15:30:15,692 INFO L87 Difference]: Start difference. First operand 413 states and 505 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 15:30:15,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:15,802 INFO L93 Difference]: Finished difference Result 786 states and 973 transitions. [2021-11-17 15:30:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-17 15:30:15,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 120 [2021-11-17 15:30:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:15,805 INFO L225 Difference]: With dead ends: 786 [2021-11-17 15:30:15,805 INFO L226 Difference]: Without dead ends: 422 [2021-11-17 15:30:15,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-17 15:30:15,807 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 19 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:15,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1448 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:30:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-17 15:30:15,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2021-11-17 15:30:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 408 states have (on average 1.2254901960784315) internal successors, (500), 415 states have internal predecessors, (500), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-17 15:30:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 518 transitions. [2021-11-17 15:30:15,819 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 518 transitions. Word has length 120 [2021-11-17 15:30:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:15,819 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 518 transitions. [2021-11-17 15:30:15,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 15:30:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 518 transitions. [2021-11-17 15:30:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-17 15:30:15,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:15,821 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:15,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:16,051 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 [2021-11-17 15:30:16,052 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 624699891, now seen corresponding path program 2 times [2021-11-17 15:30:16,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:16,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081258766] [2021-11-17 15:30:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:16,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:16,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:16,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442604189] [2021-11-17 15:30:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 15:30:16,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:16,093 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) [2021-11-17 15:30:16,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-17 15:30:16,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 15:30:16,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 15:30:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-17 15:30:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 15:30:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-17 15:30:16,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 15:30:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-17 15:30:16,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 15:30:16,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081258766] [2021-11-17 15:30:16,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-17 15:30:16,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442604189] [2021-11-17 15:30:16,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442604189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 15:30:16,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-17 15:30:16,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-11-17 15:30:16,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240690324] [2021-11-17 15:30:16,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-17 15:30:16,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-17 15:30:16,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 15:30:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-17 15:30:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-17 15:30:16,901 INFO L87 Difference]: Start difference. First operand 422 states and 518 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 15:30:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 15:30:17,106 INFO L93 Difference]: Finished difference Result 797 states and 986 transitions. [2021-11-17 15:30:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-17 15:30:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-11-17 15:30:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 15:30:17,108 INFO L225 Difference]: With dead ends: 797 [2021-11-17 15:30:17,108 INFO L226 Difference]: Without dead ends: 428 [2021-11-17 15:30:17,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-11-17 15:30:17,110 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 18 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 15:30:17,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1914 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 15:30:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-17 15:30:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2021-11-17 15:30:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 412 states have (on average 1.2281553398058251) internal successors, (506), 419 states have internal predecessors, (506), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-17 15:30:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 523 transitions. [2021-11-17 15:30:17,120 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 523 transitions. Word has length 124 [2021-11-17 15:30:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 15:30:17,121 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 523 transitions. [2021-11-17 15:30:17,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 15:30:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 523 transitions. [2021-11-17 15:30:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-17 15:30:17,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 15:30:17,122 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 15:30:17,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-17 15:30:17,339 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 [2021-11-17 15:30:17,340 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 15:30:17,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 15:30:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1185103091, now seen corresponding path program 3 times [2021-11-17 15:30:17,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 15:30:17,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348351510] [2021-11-17 15:30:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 15:30:17,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 15:30:17,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-17 15:30:17,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614607740] [2021-11-17 15:30:17,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-17 15:30:17,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 15:30:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 15:30:17,372 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) [2021-11-17 15:30:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process Killed by 15