./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_stateful-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/seq-pthread/cs_stateful-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 8ecae2ca1de1e5b446d807037ed0cb2d4fc04c355acb35a6870f18f7e175f10e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:41:19,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:41:19,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:41:19,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:41:19,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:41:19,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:41:19,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:41:19,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:41:19,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:41:19,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:41:19,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:41:19,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:41:19,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:41:19,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:41:19,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:41:19,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:41:19,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:41:19,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:41:19,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:41:19,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:41:19,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:41:19,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:41:19,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:41:19,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:41:19,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:41:19,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:41:19,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:41:19,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:41:19,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:41:19,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:41:19,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:41:19,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:41:19,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:41:19,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:41:19,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:41:19,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:41:19,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:41:19,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:41:19,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:41:19,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:41:19,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:41:19,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:41:19,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:41:19,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:41:19,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:41:19,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:41:19,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:41:19,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:41:19,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:41:19,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:41:19,661 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:41:19,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:41:19,661 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:41:19,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:41:19,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:41:19,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:41:19,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:41:19,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:41:19,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:41:19,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:41:19,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:41:19,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:41:19,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:41:19,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:41:19,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:41:19,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:41:19,664 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:41:19,664 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:41:19,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:41:19,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:41:19,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ecae2ca1de1e5b446d807037ed0cb2d4fc04c355acb35a6870f18f7e175f10e [2021-12-16 01:41:19,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:41:19,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:41:19,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:41:19,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:41:19,866 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:41:19,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2021-12-16 01:41:19,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a4bd374/cc4176e4b4514987a4cf81cb115a83ac/FLAG8bd349081 [2021-12-16 01:41:20,415 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:41:20,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2021-12-16 01:41:20,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a4bd374/cc4176e4b4514987a4cf81cb115a83ac/FLAG8bd349081 [2021-12-16 01:41:20,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a4bd374/cc4176e4b4514987a4cf81cb115a83ac [2021-12-16 01:41:20,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:41:20,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:41:20,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:41:20,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:41:20,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:41:20,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:41:20" (1/1) ... [2021-12-16 01:41:20,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69b26809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:20, skipping insertion in model container [2021-12-16 01:41:20,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:41:20" (1/1) ... [2021-12-16 01:41:20,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:41:20,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:41:21,017 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/seq-pthread/cs_stateful-1.i[23400,23413] [2021-12-16 01:41:21,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:41:21,089 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:41:21,124 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/seq-pthread/cs_stateful-1.i[23400,23413] [2021-12-16 01:41:21,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:41:21,186 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:41:21,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21 WrapperNode [2021-12-16 01:41:21,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:41:21,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:41:21,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:41:21,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:41:21,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,243 INFO L137 Inliner]: procedures = 144, calls = 231, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 563 [2021-12-16 01:41:21,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:41:21,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:41:21,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:41:21,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:41:21,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:41:21,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:41:21,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:41:21,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:41:21,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (1/1) ... [2021-12-16 01:41:21,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:41:21,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:21,323 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) [2021-12-16 01:41:21,329 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 [2021-12-16 01:41:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 01:41:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 01:41:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:41:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 01:41:21,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 01:41:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2021-12-16 01:41:21,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2021-12-16 01:41:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-12-16 01:41:21,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-12-16 01:41:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-16 01:41:21,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-16 01:41:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 01:41:21,358 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-16 01:41:21,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-16 01:41:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-16 01:41:21,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-16 01:41:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 01:41:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 01:41:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-16 01:41:21,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-16 01:41:21,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:41:21,360 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-12-16 01:41:21,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-12-16 01:41:21,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:41:21,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:41:21,536 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:41:21,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:41:21,776 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746: SUMMARY for call __CS_cs(); srcloc: null [2021-12-16 01:41:21,776 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-12-16 01:41:21,776 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-1: assume !(0 != ~__CS_ret~0 % 256); [2021-12-16 01:41:21,776 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !(0 != ~__CS_ret~0 % 256); [2021-12-16 01:41:21,776 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-12-16 01:41:21,777 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !(0 != ~__CS_ret~0 % 256); [2021-12-16 01:41:21,777 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-12-16 01:41:22,265 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:41:22,271 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:41:22,271 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 01:41:22,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:41:22 BoogieIcfgContainer [2021-12-16 01:41:22,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:41:22,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:41:22,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:41:22,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:41:22,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:41:20" (1/3) ... [2021-12-16 01:41:22,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362ad92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:41:22, skipping insertion in model container [2021-12-16 01:41:22,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:21" (2/3) ... [2021-12-16 01:41:22,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362ad92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:41:22, skipping insertion in model container [2021-12-16 01:41:22,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:41:22" (3/3) ... [2021-12-16 01:41:22,280 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stateful-1.i [2021-12-16 01:41:22,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:41:22,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:41:22,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:41:22,324 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 [2021-12-16 01:41:22,325 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:41:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 121 states have (on average 1.5041322314049588) internal successors, (182), 122 states have internal predecessors, (182), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-16 01:41:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 01:41:22,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:22,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:22,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:22,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1724368089, now seen corresponding path program 1 times [2021-12-16 01:41:22,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41725304] [2021-12-16 01:41:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:22,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:41:22,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41725304] [2021-12-16 01:41:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41725304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:22,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:22,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:41:22,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961618716] [2021-12-16 01:41:22,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:22,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:41:22,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:41:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:22,805 INFO L87 Difference]: Start difference. First operand has 172 states, 121 states have (on average 1.5041322314049588) internal successors, (182), 122 states have internal predecessors, (182), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-16 01:41:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:22,890 INFO L93 Difference]: Finished difference Result 347 states and 569 transitions. [2021-12-16 01:41:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:41:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 32 [2021-12-16 01:41:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:22,922 INFO L225 Difference]: With dead ends: 347 [2021-12-16 01:41:22,922 INFO L226 Difference]: Without dead ends: 173 [2021-12-16 01:41:22,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:22,932 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 5 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:22,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 492 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-16 01:41:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2021-12-16 01:41:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 119 states have (on average 1.3781512605042017) internal successors, (164), 119 states have internal predecessors, (164), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-16 01:41:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 248 transitions. [2021-12-16 01:41:22,990 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 248 transitions. Word has length 32 [2021-12-16 01:41:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:22,990 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 248 transitions. [2021-12-16 01:41:22,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-12-16 01:41:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 248 transitions. [2021-12-16 01:41:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 01:41:22,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:22,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:22,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:41:22,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1488698589, now seen corresponding path program 1 times [2021-12-16 01:41:23,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:23,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008985272] [2021-12-16 01:41:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:23,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:41:23,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:23,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008985272] [2021-12-16 01:41:23,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008985272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:23,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:23,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:41:23,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152627345] [2021-12-16 01:41:23,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:23,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:41:23,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:41:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:23,167 INFO L87 Difference]: Start difference. First operand 169 states and 248 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-12-16 01:41:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:23,189 INFO L93 Difference]: Finished difference Result 337 states and 496 transitions. [2021-12-16 01:41:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:41:23,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-12-16 01:41:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:23,192 INFO L225 Difference]: With dead ends: 337 [2021-12-16 01:41:23,192 INFO L226 Difference]: Without dead ends: 171 [2021-12-16 01:41:23,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:23,194 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 1 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:23,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 487 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-16 01:41:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-12-16 01:41:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 120 states have (on average 1.375) internal successors, (165), 120 states have internal predecessors, (165), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-16 01:41:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 249 transitions. [2021-12-16 01:41:23,204 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 249 transitions. Word has length 36 [2021-12-16 01:41:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:23,204 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 249 transitions. [2021-12-16 01:41:23,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-12-16 01:41:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 249 transitions. [2021-12-16 01:41:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 01:41:23,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:23,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:23,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:41:23,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash 967627515, now seen corresponding path program 1 times [2021-12-16 01:41:23,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:23,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037330278] [2021-12-16 01:41:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:23,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:41:23,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037330278] [2021-12-16 01:41:23,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037330278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433851153] [2021-12-16 01:41:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:23,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:23,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:23,331 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) [2021-12-16 01:41:23,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:41:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:41:23,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:41:23,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:41:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:41:24,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433851153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:41:24,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:41:24,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-16 01:41:24,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750890597] [2021-12-16 01:41:24,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:41:24,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:41:24,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:41:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:41:24,114 INFO L87 Difference]: Start difference. First operand 170 states and 249 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2021-12-16 01:41:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:24,160 INFO L93 Difference]: Finished difference Result 341 states and 501 transitions. [2021-12-16 01:41:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:41:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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 38 [2021-12-16 01:41:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:24,162 INFO L225 Difference]: With dead ends: 341 [2021-12-16 01:41:24,162 INFO L226 Difference]: Without dead ends: 174 [2021-12-16 01:41:24,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:41:24,164 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 3 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:24,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 971 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-16 01:41:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-12-16 01:41:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 124 states have internal predecessors, (169), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-16 01:41:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 253 transitions. [2021-12-16 01:41:24,179 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 253 transitions. Word has length 38 [2021-12-16 01:41:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 253 transitions. [2021-12-16 01:41:24,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2021-12-16 01:41:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 253 transitions. [2021-12-16 01:41:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 01:41:24,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:24,181 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:24,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 01:41:24,385 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 [2021-12-16 01:41:24,386 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash -624054089, now seen corresponding path program 2 times [2021-12-16 01:41:24,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:24,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117520075] [2021-12-16 01:41:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:24,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 01:41:24,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117520075] [2021-12-16 01:41:24,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117520075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123163893] [2021-12-16 01:41:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 01:41:24,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:24,624 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) [2021-12-16 01:41:24,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:41:25,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 01:41:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 01:41:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 01:41:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 01:41:25,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:41:25,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123163893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:25,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:41:25,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-16 01:41:25,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563043750] [2021-12-16 01:41:25,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:25,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:41:25,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:25,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:41:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:41:25,554 INFO L87 Difference]: Start difference. First operand 174 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-12-16 01:41:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:25,595 INFO L93 Difference]: Finished difference Result 332 states and 495 transitions. [2021-12-16 01:41:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:41:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 42 [2021-12-16 01:41:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:25,604 INFO L225 Difference]: With dead ends: 332 [2021-12-16 01:41:25,604 INFO L226 Difference]: Without dead ends: 306 [2021-12-16 01:41:25,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:41:25,605 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 206 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:25,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 934 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-16 01:41:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-12-16 01:41:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 207 states have (on average 1.4106280193236715) internal successors, (292), 207 states have internal predecessors, (292), 83 states have call successors, (83), 14 states have call predecessors, (83), 14 states have return successors, (91), 83 states have call predecessors, (91), 83 states have call successors, (91) [2021-12-16 01:41:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 466 transitions. [2021-12-16 01:41:25,636 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 466 transitions. Word has length 42 [2021-12-16 01:41:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:25,637 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 466 transitions. [2021-12-16 01:41:25,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-12-16 01:41:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 466 transitions. [2021-12-16 01:41:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-16 01:41:25,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:25,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:25,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 01:41:25,863 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 [2021-12-16 01:41:25,864 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1759881955, now seen corresponding path program 1 times [2021-12-16 01:41:25,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570882606] [2021-12-16 01:41:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:25,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 01:41:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:41:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:41:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 01:41:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:41:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-16 01:41:26,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570882606] [2021-12-16 01:41:26,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570882606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617031621] [2021-12-16 01:41:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:26,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:26,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:26,167 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) [2021-12-16 01:41:26,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 01:41:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:41:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-16 01:41:27,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:41:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-16 01:41:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617031621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:41:27,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:41:27,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 9 [2021-12-16 01:41:27,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309440490] [2021-12-16 01:41:27,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:41:27,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:41:27,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:41:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:41:27,409 INFO L87 Difference]: Start difference. First operand 305 states and 466 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 01:41:29,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:31,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:33,508 INFO L93 Difference]: Finished difference Result 617 states and 950 transitions. [2021-12-16 01:41:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 01:41:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 100 [2021-12-16 01:41:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:33,512 INFO L225 Difference]: With dead ends: 617 [2021-12-16 01:41:33,512 INFO L226 Difference]: Without dead ends: 325 [2021-12-16 01:41:33,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:41:33,514 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 36 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:33,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 994 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 537 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-12-16 01:41:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-16 01:41:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2021-12-16 01:41:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 219 states have (on average 1.3926940639269407) internal successors, (305), 221 states have internal predecessors, (305), 83 states have call successors, (83), 14 states have call predecessors, (83), 16 states have return successors, (97), 83 states have call predecessors, (97), 83 states have call successors, (97) [2021-12-16 01:41:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 485 transitions. [2021-12-16 01:41:33,538 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 485 transitions. Word has length 100 [2021-12-16 01:41:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:33,539 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 485 transitions. [2021-12-16 01:41:33,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 01:41:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 485 transitions. [2021-12-16 01:41:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 01:41:33,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:33,544 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 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] [2021-12-16 01:41:33,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 01:41:33,767 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 [2021-12-16 01:41:33,768 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash -420954683, now seen corresponding path program 2 times [2021-12-16 01:41:33,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:33,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922396936] [2021-12-16 01:41:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:33,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:41:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:41:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:41:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 01:41:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:41:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 01:41:34,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922396936] [2021-12-16 01:41:34,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922396936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:34,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:34,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 01:41:34,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366510547] [2021-12-16 01:41:34,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:34,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 01:41:34,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:34,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 01:41:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:41:34,218 INFO L87 Difference]: Start difference. First operand 319 states and 485 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:41:36,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:37,221 INFO L93 Difference]: Finished difference Result 662 states and 1021 transitions. [2021-12-16 01:41:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:41:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-16 01:41:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:37,227 INFO L225 Difference]: With dead ends: 662 [2021-12-16 01:41:37,228 INFO L226 Difference]: Without dead ends: 636 [2021-12-16 01:41:37,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:41:37,229 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 313 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 167 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:37,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 949 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 657 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-12-16 01:41:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-12-16 01:41:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 595. [2021-12-16 01:41:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 394 states have (on average 1.4238578680203047) internal successors, (561), 401 states have internal predecessors, (561), 165 states have call successors, (165), 28 states have call predecessors, (165), 35 states have return successors, (209), 165 states have call predecessors, (209), 165 states have call successors, (209) [2021-12-16 01:41:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 935 transitions. [2021-12-16 01:41:37,277 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 935 transitions. Word has length 110 [2021-12-16 01:41:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:37,278 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 935 transitions. [2021-12-16 01:41:37,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:41:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 935 transitions. [2021-12-16 01:41:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 01:41:37,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:37,281 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 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] [2021-12-16 01:41:37,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:41:37,281 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash -593993191, now seen corresponding path program 1 times [2021-12-16 01:41:37,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:37,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083684897] [2021-12-16 01:41:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:37,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 01:41:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:41:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:41:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 01:41:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:41:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 01:41:47,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:47,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083684897] [2021-12-16 01:41:47,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083684897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:47,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:47,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 01:41:47,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768462845] [2021-12-16 01:41:47,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:47,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 01:41:47,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 01:41:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:41:47,487 INFO L87 Difference]: Start difference. First operand 595 states and 935 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:41:49,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:51,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:53,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:54,902 INFO L93 Difference]: Finished difference Result 1199 states and 1885 transitions. [2021-12-16 01:41:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 01:41:54,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-12-16 01:41:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:54,907 INFO L225 Difference]: With dead ends: 1199 [2021-12-16 01:41:54,908 INFO L226 Difference]: Without dead ends: 824 [2021-12-16 01:41:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:41:54,911 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 263 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 112 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:54,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1294 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 932 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-12-16 01:41:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-16 01:41:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 781. [2021-12-16 01:41:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 507 states have (on average 1.428007889546351) internal successors, (724), 518 states have internal predecessors, (724), 225 states have call successors, (225), 38 states have call predecessors, (225), 48 states have return successors, (303), 224 states have call predecessors, (303), 225 states have call successors, (303) [2021-12-16 01:41:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1252 transitions. [2021-12-16 01:41:54,991 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1252 transitions. Word has length 110 [2021-12-16 01:41:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:54,991 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1252 transitions. [2021-12-16 01:41:54,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 01:41:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1252 transitions. [2021-12-16 01:41:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-16 01:41:55,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:55,002 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:55,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:41:55,002 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:55,003 INFO L85 PathProgramCache]: Analyzing trace with hash 368465859, now seen corresponding path program 1 times [2021-12-16 01:41:55,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:55,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131811012] [2021-12-16 01:41:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:55,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 01:41:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:41:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:41:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:41:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 01:41:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:41:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-16 01:41:55,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:55,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131811012] [2021-12-16 01:41:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131811012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:55,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171986885] [2021-12-16 01:41:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:55,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:55,349 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) [2021-12-16 01:41:55,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 01:41:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:56,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 01:41:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:56,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-12-16 01:41:56,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 01:41:56,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-16 01:41:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 01:41:56,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:41:56,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171986885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:56,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:41:56,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-16 01:41:56,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483248505] [2021-12-16 01:41:56,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:56,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:41:56,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:41:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:41:56,476 INFO L87 Difference]: Start difference. First operand 781 states and 1252 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:41:58,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:58,683 INFO L93 Difference]: Finished difference Result 1373 states and 2164 transitions. [2021-12-16 01:41:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:41:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2021-12-16 01:41:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:58,689 INFO L225 Difference]: With dead ends: 1373 [2021-12-16 01:41:58,689 INFO L226 Difference]: Without dead ends: 733 [2021-12-16 01:41:58,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:41:58,695 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 289 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:58,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 722 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 43 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 01:41:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-12-16 01:41:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 704. [2021-12-16 01:41:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 470 states have (on average 1.4) internal successors, (658), 477 states have internal predecessors, (658), 187 states have call successors, (187), 34 states have call predecessors, (187), 46 states have return successors, (249), 192 states have call predecessors, (249), 187 states have call successors, (249) [2021-12-16 01:41:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1094 transitions. [2021-12-16 01:41:58,730 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1094 transitions. Word has length 128 [2021-12-16 01:41:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:58,731 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1094 transitions. [2021-12-16 01:41:58,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:41:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1094 transitions. [2021-12-16 01:41:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-16 01:41:58,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:58,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:58,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 01:41:58,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:58,943 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:58,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:58,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1044737443, now seen corresponding path program 1 times [2021-12-16 01:41:58,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:58,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362568434] [2021-12-16 01:41:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:58,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:42:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:42:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 01:42:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:42:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:42:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:42:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:42:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:42:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 01:42:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:42:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-16 01:42:07,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:42:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362568434] [2021-12-16 01:42:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362568434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:42:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538506818] [2021-12-16 01:42:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:07,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:42:07,157 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) [2021-12-16 01:42:07,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 01:42:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 01:42:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:42:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 01:42:08,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:42:08,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538506818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:42:08,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:42:08,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-12-16 01:42:08,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932370089] [2021-12-16 01:42:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:42:08,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:42:08,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:42:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:42:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:42:08,411 INFO L87 Difference]: Start difference. First operand 704 states and 1094 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:42:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:42:08,771 INFO L93 Difference]: Finished difference Result 1633 states and 2687 transitions. [2021-12-16 01:42:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:42:08,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2021-12-16 01:42:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:42:08,777 INFO L225 Difference]: With dead ends: 1633 [2021-12-16 01:42:08,778 INFO L226 Difference]: Without dead ends: 955 [2021-12-16 01:42:08,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:42:08,782 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 437 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 01:42:08,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 436 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 01:42:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-12-16 01:42:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 909. [2021-12-16 01:42:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 658 states have (on average 1.2857142857142858) internal successors, (846), 556 states have internal predecessors, (846), 187 states have call successors, (187), 34 states have call predecessors, (187), 63 states have return successors, (392), 318 states have call predecessors, (392), 187 states have call successors, (392) [2021-12-16 01:42:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1425 transitions. [2021-12-16 01:42:08,819 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1425 transitions. Word has length 128 [2021-12-16 01:42:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:42:08,820 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1425 transitions. [2021-12-16 01:42:08,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:42:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1425 transitions. [2021-12-16 01:42:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-16 01:42:08,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:42:08,822 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:42:08,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 01:42:09,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:09,049 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:42:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:42:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1754284257, now seen corresponding path program 1 times [2021-12-16 01:42:09,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:42:09,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801073636] [2021-12-16 01:42:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:09,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:42:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:42:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 01:42:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 01:42:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:42:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 01:42:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:42:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:42:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 01:42:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 01:42:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-16 01:42:17,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:42:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801073636] [2021-12-16 01:42:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801073636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:42:17,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946209765] [2021-12-16 01:42:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:17,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:17,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:42:17,347 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) [2021-12-16 01:42:17,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 01:42:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:18,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 01:42:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:42:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 01:42:18,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:42:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946209765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:42:18,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:42:18,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2021-12-16 01:42:18,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732148289] [2021-12-16 01:42:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:42:18,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 01:42:18,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:42:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 01:42:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:42:18,711 INFO L87 Difference]: Start difference. First operand 909 states and 1425 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:42:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:42:19,950 INFO L93 Difference]: Finished difference Result 2092 states and 3245 transitions. [2021-12-16 01:42:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 01:42:19,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2021-12-16 01:42:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:42:19,958 INFO L225 Difference]: With dead ends: 2092 [2021-12-16 01:42:19,959 INFO L226 Difference]: Without dead ends: 1209 [2021-12-16 01:42:19,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-16 01:42:19,965 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 440 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:42:19,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1047 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 01:42:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-12-16 01:42:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 976. [2021-12-16 01:42:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 702 states have (on average 1.274928774928775) internal successors, (895), 626 states have internal predecessors, (895), 197 states have call successors, (197), 44 states have call predecessors, (197), 76 states have return successors, (401), 305 states have call predecessors, (401), 197 states have call successors, (401) [2021-12-16 01:42:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1493 transitions. [2021-12-16 01:42:20,025 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1493 transitions. Word has length 128 [2021-12-16 01:42:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:42:20,026 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1493 transitions. [2021-12-16 01:42:20,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 01:42:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1493 transitions. [2021-12-16 01:42:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:42:20,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:42:20,029 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:42:20,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 01:42:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:20,236 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:42:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:42:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1317733594, now seen corresponding path program 1 times [2021-12-16 01:42:20,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:42:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789375740] [2021-12-16 01:42:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:20,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms