./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partial_init_ground.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/array-examples/standard_partial_init_ground.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 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 21:33:22,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 21:33:22,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 21:33:22,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 21:33:22,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 21:33:22,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 21:33:22,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 21:33:22,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 21:33:22,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 21:33:22,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 21:33:22,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 21:33:22,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 21:33:22,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 21:33:22,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 21:33:22,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 21:33:22,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 21:33:22,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 21:33:22,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 21:33:22,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 21:33:22,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 21:33:22,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 21:33:22,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 21:33:22,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 21:33:22,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 21:33:22,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 21:33:22,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 21:33:22,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 21:33:22,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 21:33:22,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 21:33:22,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 21:33:22,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 21:33:22,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 21:33:22,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 21:33:22,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 21:33:22,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 21:33:22,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 21:33:22,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 21:33:22,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 21:33:22,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 21:33:22,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 21:33:22,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 21:33:22,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 21:33:22,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 21:33:22,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 21:33:22,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 21:33:22,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 21:33:22,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 21:33:22,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 21:33:22,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 21:33:22,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 21:33:22,756 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 21:33:22,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 21:33:22,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 21:33:22,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 21:33:22,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 21:33:22,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 21:33:22,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 21:33:22,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 21:33:22,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 21:33:22,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 21:33:22,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 21:33:22,758 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 21:33:22,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 21:33:22,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 21:33:22,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 21:33:22,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 21:33:22,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:33:22,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 21:33:22,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 21:33:22,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 21:33:22,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 21:33:22,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 21:33:22,760 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 21:33:22,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 21:33:22,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 21:33:22,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 21:33:22,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59d5175089b9a27cfba8f910bda680bc8b61a004048e68040b8cf993cc9cd888 [2021-12-16 21:33:22,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 21:33:22,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 21:33:22,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 21:33:22,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 21:33:22,984 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 21:33:22,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2021-12-16 21:33:23,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2306676d3/237a1f9dcd57469d93fb860f8cb01ad2/FLAG05e537781 [2021-12-16 21:33:23,360 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 21:33:23,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partial_init_ground.i [2021-12-16 21:33:23,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2306676d3/237a1f9dcd57469d93fb860f8cb01ad2/FLAG05e537781 [2021-12-16 21:33:23,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2306676d3/237a1f9dcd57469d93fb860f8cb01ad2 [2021-12-16 21:33:23,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 21:33:23,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 21:33:23,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 21:33:23,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 21:33:23,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 21:33:23,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:23,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@686d873e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23, skipping insertion in model container [2021-12-16 21:33:23,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:23,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 21:33:23,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 21:33:23,942 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/array-examples/standard_partial_init_ground.i[821,834] [2021-12-16 21:33:23,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:33:23,964 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 21:33:23,974 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/array-examples/standard_partial_init_ground.i[821,834] [2021-12-16 21:33:23,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:33:23,989 INFO L208 MainTranslator]: Completed translation [2021-12-16 21:33:23,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23 WrapperNode [2021-12-16 21:33:23,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 21:33:23,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 21:33:23,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 21:33:23,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 21:33:23,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,032 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2021-12-16 21:33:24,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 21:33:24,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 21:33:24,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 21:33:24,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 21:33:24,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 21:33:24,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 21:33:24,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 21:33:24,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 21:33:24,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (1/1) ... [2021-12-16 21:33:24,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:33:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:33:24,083 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 21:33:24,110 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 21:33:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 21:33:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 21:33:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 21:33:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 21:33:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 21:33:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 21:33:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 21:33:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 21:33:24,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 21:33:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 21:33:24,184 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 21:33:24,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 21:33:24,348 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 21:33:24,353 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 21:33:24,353 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 21:33:24,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:33:24 BoogieIcfgContainer [2021-12-16 21:33:24,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 21:33:24,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 21:33:24,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 21:33:24,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 21:33:24,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:33:23" (1/3) ... [2021-12-16 21:33:24,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70389ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:33:24, skipping insertion in model container [2021-12-16 21:33:24,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:33:23" (2/3) ... [2021-12-16 21:33:24,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70389ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:33:24, skipping insertion in model container [2021-12-16 21:33:24,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:33:24" (3/3) ... [2021-12-16 21:33:24,361 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2021-12-16 21:33:24,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 21:33:24,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 21:33:24,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 21:33:24,426 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 21:33:24,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 21:33:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 21:33:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 21:33:24,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:33:24,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:33:24,454 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:33:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:33:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 543579029, now seen corresponding path program 1 times [2021-12-16 21:33:24,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:33:24,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949954939] [2021-12-16 21:33:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:24,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:33:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:24,596 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 21:33:24,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:33:24,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949954939] [2021-12-16 21:33:24,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949954939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:33:24,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 21:33:24,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 21:33:24,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099070732] [2021-12-16 21:33:24,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:33:24,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:33:24,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:33:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:33:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:33:24,628 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:33:24,664 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-12-16 21:33:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:33:24,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 21:33:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:33:24,672 INFO L225 Difference]: With dead ends: 57 [2021-12-16 21:33:24,673 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 21:33:24,675 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 21:33:24,679 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:33:24,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:33:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 21:33:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-12-16 21:33:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 21:33:24,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-16 21:33:24,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2021-12-16 21:33:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:33:24,711 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-16 21:33:24,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-16 21:33:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 21:33:24,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:33:24,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:33:24,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 21:33:24,713 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:33:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:33:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2037184774, now seen corresponding path program 1 times [2021-12-16 21:33:24,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:33:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528176301] [2021-12-16 21:33:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:24,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:33:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:33:24,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:33:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528176301] [2021-12-16 21:33:24,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528176301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:33:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242663654] [2021-12-16 21:33:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:24,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:33:24,769 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 21:33:24,797 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 21:33:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:24,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 21:33:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:33:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:33:24,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:33:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 21:33:25,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242663654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:33:25,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:33:25,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 21:33:25,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039062052] [2021-12-16 21:33:25,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:33:25,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 21:33:25,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:33:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 21:33:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:33:25,008 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:33:25,090 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-12-16 21:33:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 21:33:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 21:33:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:33:25,092 INFO L225 Difference]: With dead ends: 62 [2021-12-16 21:33:25,093 INFO L226 Difference]: Without dead ends: 41 [2021-12-16 21:33:25,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:33:25,096 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:33:25,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 85 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:33:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-16 21:33:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-16 21:33:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 21:33:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-16 21:33:25,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 16 [2021-12-16 21:33:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:33:25,108 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-16 21:33:25,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-16 21:33:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 21:33:25,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:33:25,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:33:25,129 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 21:33:25,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:25,318 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:33:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:33:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1365921470, now seen corresponding path program 2 times [2021-12-16 21:33:25,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:33:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893568678] [2021-12-16 21:33:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:25,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:33:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 21:33:25,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:33:25,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893568678] [2021-12-16 21:33:25,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893568678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:33:25,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560788431] [2021-12-16 21:33:25,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 21:33:25,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:25,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:33:25,457 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 21:33:25,475 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 21:33:25,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 21:33:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:33:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 21:33:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:33:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 21:33:25,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:33:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 21:33:25,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560788431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:33:25,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:33:25,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-16 21:33:25,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061274031] [2021-12-16 21:33:25,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:33:25,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 21:33:25,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:33:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 21:33:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:33:25,792 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:33:25,895 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2021-12-16 21:33:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 21:33:25,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 21:33:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:33:25,897 INFO L225 Difference]: With dead ends: 101 [2021-12-16 21:33:25,897 INFO L226 Difference]: Without dead ends: 71 [2021-12-16 21:33:25,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:33:25,899 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:33:25,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 91 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:33:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-16 21:33:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-16 21:33:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 21:33:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-12-16 21:33:25,909 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 31 [2021-12-16 21:33:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:33:25,909 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-12-16 21:33:25,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-12-16 21:33:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 21:33:25,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:33:25,911 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:33:25,939 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 21:33:26,127 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,SelfDestructingSolverStorable2 [2021-12-16 21:33:26,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:33:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:33:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash 68306806, now seen corresponding path program 3 times [2021-12-16 21:33:26,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:33:26,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519506923] [2021-12-16 21:33:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:26,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:33:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-16 21:33:26,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:33:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519506923] [2021-12-16 21:33:26,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519506923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:33:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109173993] [2021-12-16 21:33:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 21:33:26,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:26,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:33:26,388 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 21:33:26,415 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 21:33:28,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-16 21:33:28,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:33:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 21:33:28,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:33:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-16 21:33:28,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:33:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-16 21:33:28,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109173993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:33:28,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:33:28,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-16 21:33:28,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69529990] [2021-12-16 21:33:28,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:33:28,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 21:33:28,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:33:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 21:33:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 21:33:28,433 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:33:28,690 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2021-12-16 21:33:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 21:33:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 21:33:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:33:28,693 INFO L225 Difference]: With dead ends: 179 [2021-12-16 21:33:28,693 INFO L226 Difference]: Without dead ends: 131 [2021-12-16 21:33:28,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 21:33:28,695 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 261 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:33:28,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 64 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:33:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-16 21:33:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-16 21:33:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.204724409448819) internal successors, (153), 127 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 21:33:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2021-12-16 21:33:28,706 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 61 [2021-12-16 21:33:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:33:28,706 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2021-12-16 21:33:28,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2021-12-16 21:33:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 21:33:28,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:33:28,710 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:33:28,732 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 21:33:28,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:28,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:33:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:33:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1368382430, now seen corresponding path program 4 times [2021-12-16 21:33:28,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:33:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479547975] [2021-12-16 21:33:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:28,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:33:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-16 21:33:29,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:33:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479547975] [2021-12-16 21:33:29,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479547975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:33:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492348505] [2021-12-16 21:33:29,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 21:33:29,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:33:29,418 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 21:33:29,419 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 21:33:29,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 21:33:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:33:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 21:33:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:33:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-16 21:33:29,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:33:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-12-16 21:33:30,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492348505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:33:30,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:33:30,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-16 21:33:30,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418058047] [2021-12-16 21:33:30,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:33:30,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-16 21:33:30,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:33:30,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-16 21:33:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 21:33:30,805 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:33:31,209 INFO L93 Difference]: Finished difference Result 335 states and 458 transitions. [2021-12-16 21:33:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 21:33:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-16 21:33:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:33:31,211 INFO L225 Difference]: With dead ends: 335 [2021-12-16 21:33:31,211 INFO L226 Difference]: Without dead ends: 251 [2021-12-16 21:33:31,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 21:33:31,213 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 459 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 21:33:31,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 164 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 21:33:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-16 21:33:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-12-16 21:33:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.2024291497975708) internal successors, (297), 247 states have internal predecessors, (297), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 21:33:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2021-12-16 21:33:31,237 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 121 [2021-12-16 21:33:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:33:31,238 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2021-12-16 21:33:31,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:33:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2021-12-16 21:33:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-16 21:33:31,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:33:31,248 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:33:31,268 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 21:33:31,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:31,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:33:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:33:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1690281134, now seen corresponding path program 5 times [2021-12-16 21:33:31,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:33:31,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496180590] [2021-12-16 21:33:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:33:31,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:33:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:33:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-12-16 21:33:32,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:33:32,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496180590] [2021-12-16 21:33:32,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496180590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:33:32,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270712176] [2021-12-16 21:33:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 21:33:32,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:33:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:33:32,608 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 21:33:32,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15