./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/insertion_sort-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/loops/insertion_sort-1.c -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 295b17c4ca5a4afcf4a0f36e9026f57ef5bd93d017747132380452b1ff4662bd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:46:05,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:46:05,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:46:05,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:46:05,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:46:05,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:46:05,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:46:05,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:46:05,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:46:05,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:46:05,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:46:05,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:46:05,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:46:05,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:46:05,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:46:05,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:46:05,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:46:05,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:46:05,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:46:05,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:46:05,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:46:05,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:46:05,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:46:05,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:46:05,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:46:05,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:46:05,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:46:05,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:46:05,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:46:05,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:46:05,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:46:05,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:46:05,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:46:05,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:46:05,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:46:05,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:46:05,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:46:05,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:46:05,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:46:05,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:46:05,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:46:05,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:46:05,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:46:05,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:46:05,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:46:05,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:46:05,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:46:05,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:46:05,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:46:05,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:46:05,886 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:46:05,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:46:05,887 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:46:05,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:46:05,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:46:05,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:46:05,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:46:05,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:46:05,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:46:05,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:46:05,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:46:05,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:46:05,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:46:05,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:46:05,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:46:05,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:46:05,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:46:05,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:46:05,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:46:05,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:46:05,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:46:05,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:46:05,891 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:46:05,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:46:05,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:46:05,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:46:05,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 295b17c4ca5a4afcf4a0f36e9026f57ef5bd93d017747132380452b1ff4662bd [2021-12-14 13:46:06,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:46:06,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:46:06,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:46:06,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:46:06,064 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:46:06,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-1.c [2021-12-14 13:46:06,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b4cb48f/d000c6ee24f4498d8307ec0ca391be58/FLAG556eb9203 [2021-12-14 13:46:06,508 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:46:06,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-1.c [2021-12-14 13:46:06,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b4cb48f/d000c6ee24f4498d8307ec0ca391be58/FLAG556eb9203 [2021-12-14 13:46:06,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b4cb48f/d000c6ee24f4498d8307ec0ca391be58 [2021-12-14 13:46:06,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:46:06,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:46:06,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:46:06,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:46:06,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:46:06,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5191b53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06, skipping insertion in model container [2021-12-14 13:46:06,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:46:06,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:46:06,673 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/loops/insertion_sort-1.c[328,341] [2021-12-14 13:46:06,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:46:06,692 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:46:06,702 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/loops/insertion_sort-1.c[328,341] [2021-12-14 13:46:06,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:46:06,718 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:46:06,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06 WrapperNode [2021-12-14 13:46:06,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:46:06,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:46:06,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:46:06,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:46:06,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,743 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-14 13:46:06,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:46:06,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:46:06,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:46:06,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:46:06,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:46:06,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:46:06,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:46:06,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:46:06,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (1/1) ... [2021-12-14 13:46:06,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:46:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:06,803 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) [2021-12-14 13:46:06,823 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 [2021-12-14 13:46:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:46:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:46:06,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 13:46:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 13:46:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:46:06,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:46:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 13:46:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:46:06,896 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:46:06,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:46:07,010 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:46:07,014 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:46:07,014 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 13:46:07,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:46:07 BoogieIcfgContainer [2021-12-14 13:46:07,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:46:07,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:46:07,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:46:07,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:46:07,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:46:06" (1/3) ... [2021-12-14 13:46:07,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1079f507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:46:07, skipping insertion in model container [2021-12-14 13:46:07,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:46:06" (2/3) ... [2021-12-14 13:46:07,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1079f507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:46:07, skipping insertion in model container [2021-12-14 13:46:07,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:46:07" (3/3) ... [2021-12-14 13:46:07,035 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-12-14 13:46:07,039 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:46:07,039 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:46:07,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:46:07,078 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 [2021-12-14 13:46:07,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:46:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2021-12-14 13:46:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 13:46:07,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:07,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:07,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2015618667, now seen corresponding path program 1 times [2021-12-14 13:46:07,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547304551] [2021-12-14 13:46:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:07,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:07,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:07,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547304551] [2021-12-14 13:46:07,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547304551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:46:07,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:46:07,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 13:46:07,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107701164] [2021-12-14 13:46:07,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:46:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:46:07,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:46:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:46:07,352 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:46:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:46:07,422 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-12-14 13:46:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:46:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 13:46:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:46:07,437 INFO L225 Difference]: With dead ends: 54 [2021-12-14 13:46:07,437 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 13:46:07,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 13:46:07,447 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:46:07,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:46:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 13:46:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-14 13:46:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-12-14 13:46:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-12-14 13:46:07,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 9 [2021-12-14 13:46:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:46:07,474 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-12-14 13:46:07,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:46:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-12-14 13:46:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 13:46:07,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:07,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:07,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:46:07,477 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:07,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:07,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1565476563, now seen corresponding path program 1 times [2021-12-14 13:46:07,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:07,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013666602] [2021-12-14 13:46:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:07,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:07,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013666602] [2021-12-14 13:46:07,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013666602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:46:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313029493] [2021-12-14 13:46:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:07,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:07,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:07,647 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) [2021-12-14 13:46:07,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:46:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:07,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:46:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:46:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:46:07,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:46:07,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313029493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:46:07,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:46:07,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-12-14 13:46:07,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573536132] [2021-12-14 13:46:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:46:07,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:46:07,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:46:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 13:46:07,862 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-14 13:46:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:46:07,914 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-14 13:46:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 13:46:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2021-12-14 13:46:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:46:07,915 INFO L225 Difference]: With dead ends: 37 [2021-12-14 13:46:07,915 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 13:46:07,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:46:07,916 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:46:07,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:46:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 13:46:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2021-12-14 13:46:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2021-12-14 13:46:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-12-14 13:46:07,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-12-14 13:46:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:46:07,920 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-12-14 13:46:07,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2021-12-14 13:46:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-12-14 13:46:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 13:46:07,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:07,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:07,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:46:08,121 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 [2021-12-14 13:46:08,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 188510022, now seen corresponding path program 1 times [2021-12-14 13:46:08,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:08,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45810775] [2021-12-14 13:46:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:08,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:08,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:08,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45810775] [2021-12-14 13:46:08,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45810775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:46:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027734464] [2021-12-14 13:46:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:08,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:08,195 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) [2021-12-14 13:46:08,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:46:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 13:46:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:46:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:08,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:46:10,749 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int)) (or (< (mod |c_ULTIMATE.start_main_~j~0#1| 4294967296) (mod (+ (* |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295) 1) 4294967296)) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|) (<= (+ |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|)) 0) (<= 0 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|))) is different from false [2021-12-14 13:46:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-14 13:46:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027734464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:46:13,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:46:13,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-14 13:46:13,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828821382] [2021-12-14 13:46:13,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:46:13,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 13:46:13,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 13:46:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=39, Unknown=2, NotChecked=12, Total=72 [2021-12-14 13:46:13,243 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-12-14 13:46:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:46:13,296 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-12-14 13:46:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 13:46:13,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 17 [2021-12-14 13:46:13,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:46:13,299 INFO L225 Difference]: With dead ends: 49 [2021-12-14 13:46:13,299 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 13:46:13,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=19, Invalid=39, Unknown=2, NotChecked=12, Total=72 [2021-12-14 13:46:13,300 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:46:13,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2021-12-14 13:46:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 13:46:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-12-14 13:46:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-12-14 13:46:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-14 13:46:13,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-12-14 13:46:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:46:13,310 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-14 13:46:13,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-12-14 13:46:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-14 13:46:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 13:46:13,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:13,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:13,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:46:13,527 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 [2021-12-14 13:46:13,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1379565948, now seen corresponding path program 2 times [2021-12-14 13:46:13,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:13,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165493182] [2021-12-14 13:46:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:13,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:13,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165493182] [2021-12-14 13:46:13,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165493182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:46:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966133744] [2021-12-14 13:46:13,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:46:13,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:13,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:13,972 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) [2021-12-14 13:46:13,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:46:14,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:46:14,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:46:14,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-14 13:46:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:46:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:46:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 27 [2021-12-14 13:46:14,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:46:14,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-14 13:46:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:46:14,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:46:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-12-14 13:46:16,358 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-12-14 13:46:16,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2021-12-14 13:46:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:46:16,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966133744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:46:16,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:46:16,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 25 [2021-12-14 13:46:16,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606128729] [2021-12-14 13:46:16,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:46:16,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 13:46:16,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 13:46:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-12-14 13:46:16,422 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 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) [2021-12-14 13:46:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:46:16,980 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2021-12-14 13:46:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 13:46:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 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 19 [2021-12-14 13:46:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:46:16,982 INFO L225 Difference]: With dead ends: 97 [2021-12-14 13:46:16,982 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 13:46:16,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=466, Invalid=1604, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 13:46:16,984 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 165 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:46:16,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 132 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 244 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2021-12-14 13:46:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 13:46:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2021-12-14 13:46:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 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) [2021-12-14 13:46:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-12-14 13:46:16,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 19 [2021-12-14 13:46:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:46:16,991 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-12-14 13:46:16,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 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) [2021-12-14 13:46:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-12-14 13:46:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 13:46:16,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:16,992 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:17,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:46:17,209 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 [2021-12-14 13:46:17,210 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1125897754, now seen corresponding path program 1 times [2021-12-14 13:46:17,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:17,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922488517] [2021-12-14 13:46:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:17,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:46:17,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:17,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922488517] [2021-12-14 13:46:17,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922488517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:46:17,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730151210] [2021-12-14 13:46:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:17,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:17,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:17,322 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) [2021-12-14 13:46:17,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:46:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:17,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 13:46:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:46:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:46:17,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:46:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:46:17,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730151210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:46:17,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:46:17,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-14 13:46:17,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393290713] [2021-12-14 13:46:17,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:46:17,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 13:46:17,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 13:46:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-14 13:46:17,586 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-12-14 13:46:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:46:17,718 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2021-12-14 13:46:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:46:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 23 [2021-12-14 13:46:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:46:17,720 INFO L225 Difference]: With dead ends: 122 [2021-12-14 13:46:17,720 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 13:46:17,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-14 13:46:17,721 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:46:17,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 190 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:46:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 13:46:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-12-14 13:46:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 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) [2021-12-14 13:46:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-12-14 13:46:17,727 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 23 [2021-12-14 13:46:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:46:17,727 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-12-14 13:46:17,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-12-14 13:46:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-12-14 13:46:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 13:46:17,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:17,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:17,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:46:17,943 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 [2021-12-14 13:46:17,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:17,944 INFO L85 PathProgramCache]: Analyzing trace with hash -210329187, now seen corresponding path program 1 times [2021-12-14 13:46:17,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:17,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708744252] [2021-12-14 13:46:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:17,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:18,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708744252] [2021-12-14 13:46:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708744252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:46:18,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946005918] [2021-12-14 13:46:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:18,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:18,295 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) [2021-12-14 13:46:18,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:46:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-14 13:46:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:46:18,505 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-14 13:46:18,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2021-12-14 13:46:18,739 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-12-14 13:46:18,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2021-12-14 13:46:18,980 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-12-14 13:46:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-12-14 13:46:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:46:19,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:46:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 60 [2021-12-14 13:46:22,693 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-14 13:46:22,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 382 treesize of output 346 [2021-12-14 13:46:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:46:24,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946005918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:46:24,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:46:24,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2021-12-14 13:46:24,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853305055] [2021-12-14 13:46:24,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:46:24,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-14 13:46:24,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-14 13:46:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1204, Unknown=4, NotChecked=0, Total=1406 [2021-12-14 13:46:24,478 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 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) [2021-12-14 13:46:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:46:31,772 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2021-12-14 13:46:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 13:46:31,773 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 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 24 [2021-12-14 13:46:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:46:31,775 INFO L225 Difference]: With dead ends: 147 [2021-12-14 13:46:31,775 INFO L226 Difference]: Without dead ends: 133 [2021-12-14 13:46:31,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=363, Invalid=2285, Unknown=4, NotChecked=0, Total=2652 [2021-12-14 13:46:31,799 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:46:31,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 283 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 279 Invalid, 0 Unknown, 198 Unchecked, 0.2s Time] [2021-12-14 13:46:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-14 13:46:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 86. [2021-12-14 13:46:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 85 states have internal predecessors, (108), 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) [2021-12-14 13:46:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-12-14 13:46:31,812 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 24 [2021-12-14 13:46:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:46:31,812 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-12-14 13:46:31,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 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) [2021-12-14 13:46:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-12-14 13:46:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 13:46:31,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:46:31,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:46:31,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 13:46:32,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:32,015 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:46:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:46:32,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1447473291, now seen corresponding path program 3 times [2021-12-14 13:46:32,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:46:32,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987331142] [2021-12-14 13:46:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:46:32,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:46:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:46:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:46:32,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:46:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987331142] [2021-12-14 13:46:32,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987331142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:46:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837682298] [2021-12-14 13:46:32,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:46:32,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:46:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:46:32,360 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) [2021-12-14 13:46:32,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:46:32,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 13:46:32,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:46:32,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 13:46:32,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:46:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:46:32,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 33 [2021-12-14 13:46:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:46:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:46:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:46:32,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:46:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-14 13:46:32,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:46:32,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-14 13:46:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:46:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:46:50,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2021-12-14 13:46:50,483 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-14 13:46:50,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 373 treesize of output 363 [2021-12-14 13:46:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:46:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837682298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:46:52,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:46:52,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2021-12-14 13:46:52,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382482120] [2021-12-14 13:46:52,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:46:52,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 13:46:52,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:46:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 13:46:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=822, Unknown=18, NotChecked=0, Total=992 [2021-12-14 13:46:52,029 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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) [2021-12-14 13:46:59,099 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_18| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_18| 0) (< (+ |v_ULTIMATE.start_main_~i~0#1_18| 1) |c_ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_107 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_18| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_107))) (<= (select .cse0 |c_ULTIMATE.start_main_~#v~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4))))))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|))) (<= (select .cse1 0) (select .cse1 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4)))) (not (= (+ |c_ULTIMATE.start_main_~#v~0#1.offset| (* 4 |c_ULTIMATE.start_main_~j~0#1|)) 0))) is different from false [2021-12-14 13:47:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:47:02,030 INFO L93 Difference]: Finished difference Result 251 states and 324 transitions. [2021-12-14 13:47:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 13:47:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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 27 [2021-12-14 13:47:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:47:02,032 INFO L225 Difference]: With dead ends: 251 [2021-12-14 13:47:02,032 INFO L226 Difference]: Without dead ends: 216 [2021-12-14 13:47:02,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=345, Invalid=1894, Unknown=21, NotChecked=92, Total=2352 [2021-12-14 13:47:02,033 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 173 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:47:02,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 250 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 369 Invalid, 0 Unknown, 341 Unchecked, 0.2s Time] [2021-12-14 13:47:02,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-14 13:47:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2021-12-14 13:47:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2755102040816326) internal successors, (125), 98 states have internal predecessors, (125), 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) [2021-12-14 13:47:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2021-12-14 13:47:02,053 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 27 [2021-12-14 13:47:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:47:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2021-12-14 13:47:02,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 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) [2021-12-14 13:47:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2021-12-14 13:47:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 13:47:02,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:47:02,055 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:47:02,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 13:47:02,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:47:02,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:47:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:47:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2024572452, now seen corresponding path program 2 times [2021-12-14 13:47:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:47:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192181859] [2021-12-14 13:47:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:47:02,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:47:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:47:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 13:47:02,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:47:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192181859] [2021-12-14 13:47:02,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192181859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:47:02,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:47:02,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:47:02,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342843793] [2021-12-14 13:47:02,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:47:02,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:47:02,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:47:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:47:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:47:02,293 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-14 13:47:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:47:02,300 INFO L93 Difference]: Finished difference Result 153 states and 195 transitions. [2021-12-14 13:47:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:47:02,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2021-12-14 13:47:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:47:02,302 INFO L225 Difference]: With dead ends: 153 [2021-12-14 13:47:02,302 INFO L226 Difference]: Without dead ends: 61 [2021-12-14 13:47:02,303 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 [2021-12-14 13:47:02,304 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:47:02,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:47:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-14 13:47:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-14 13:47:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 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) [2021-12-14 13:47:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-12-14 13:47:02,314 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 29 [2021-12-14 13:47:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:47:02,315 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-12-14 13:47:02,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-12-14 13:47:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-12-14 13:47:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 13:47:02,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:47:02,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:47:02,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 13:47:02,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:47:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:47:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1913928053, now seen corresponding path program 2 times [2021-12-14 13:47:02,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:47:02,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256129397] [2021-12-14 13:47:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:47:02,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:47:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:47:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:47:02,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:47:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256129397] [2021-12-14 13:47:02,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256129397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:47:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624250343] [2021-12-14 13:47:02,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:47:02,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:47:02,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:47:02,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:47:02,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:47:02,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:47:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:47:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 13:47:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:47:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 13:47:02,737 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-14 13:47:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-14 13:47:02,802 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-14 13:47:02,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-12-14 13:47:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:47:02,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:47:04,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-14 13:47:04,967 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-12-14 13:47:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 903 treesize of output 848 [2021-12-14 13:47:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:47:09,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624250343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:47:09,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:47:09,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 27 [2021-12-14 13:47:09,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490644243] [2021-12-14 13:47:09,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:47:09,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-14 13:47:09,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:47:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-14 13:47:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=602, Unknown=3, NotChecked=0, Total=702 [2021-12-14 13:47:09,447 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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) [2021-12-14 13:47:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:47:09,773 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-12-14 13:47:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 13:47:09,773 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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 31 [2021-12-14 13:47:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:47:09,774 INFO L225 Difference]: With dead ends: 94 [2021-12-14 13:47:09,774 INFO L226 Difference]: Without dead ends: 92 [2021-12-14 13:47:09,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=184, Invalid=1219, Unknown=3, NotChecked=0, Total=1406 [2021-12-14 13:47:09,775 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:47:09,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 220 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 280 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2021-12-14 13:47:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-14 13:47:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2021-12-14 13:47:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 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) [2021-12-14 13:47:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-12-14 13:47:09,780 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 31 [2021-12-14 13:47:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:47:09,780 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-12-14 13:47:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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) [2021-12-14 13:47:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-12-14 13:47:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 13:47:09,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:47:09,781 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:47:09,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 13:47:09,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:47:09,982 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:47:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:47:09,982 INFO L85 PathProgramCache]: Analyzing trace with hash -635707062, now seen corresponding path program 1 times [2021-12-14 13:47:09,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:47:09,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235741058] [2021-12-14 13:47:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:47:09,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:47:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:47:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:47:10,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:47:10,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235741058] [2021-12-14 13:47:10,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235741058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:47:10,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894655562] [2021-12-14 13:47:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:47:10,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:47:10,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:47:10,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:47:10,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 13:47:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:47:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 13:47:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:47:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:47:10,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 27 [2021-12-14 13:47:10,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:47:10,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-14 13:47:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:47:10,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:47:10,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-12-14 13:47:10,602 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-12-14 13:47:10,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2021-12-14 13:47:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:47:10,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894655562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:47:10,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:47:10,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 24 [2021-12-14 13:47:10,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822777766] [2021-12-14 13:47:10,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:47:10,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 13:47:10,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:47:10,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 13:47:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-12-14 13:47:10,745 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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) [2021-12-14 13:47:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:47:11,753 INFO L93 Difference]: Finished difference Result 171 states and 213 transitions. [2021-12-14 13:47:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-14 13:47:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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 [2021-12-14 13:47:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:47:11,754 INFO L225 Difference]: With dead ends: 171 [2021-12-14 13:47:11,754 INFO L226 Difference]: Without dead ends: 145 [2021-12-14 13:47:11,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=3340, Unknown=0, NotChecked=0, Total=4160 [2021-12-14 13:47:11,756 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 195 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:47:11,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 211 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 528 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2021-12-14 13:47:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-14 13:47:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 74. [2021-12-14 13:47:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 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) [2021-12-14 13:47:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2021-12-14 13:47:11,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 32 [2021-12-14 13:47:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:47:11,763 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2021-12-14 13:47:11,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 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) [2021-12-14 13:47:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2021-12-14 13:47:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 13:47:11,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:47:11,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:47:11,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 13:47:11,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 13:47:11,988 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:47:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:47:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash 222375954, now seen corresponding path program 3 times [2021-12-14 13:47:11,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:47:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496700440] [2021-12-14 13:47:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:47:11,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:47:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:47:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:47:12,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:47:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496700440] [2021-12-14 13:47:12,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496700440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:47:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505239163] [2021-12-14 13:47:12,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:47:12,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:47:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:47:12,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:47:12,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 13:47:12,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 13:47:12,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:47:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 13:47:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:47:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:47:12,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 32 [2021-12-14 13:47:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:47:12,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:47:12,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:47:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2021-12-14 13:47:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:47:13,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:47:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:47:13,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:47:13,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-12-14 13:47:13,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:47:13,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 15 [2021-12-14 13:47:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 13:47:13,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:47:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 101 [2021-12-14 13:47:18,298 INFO L354 Elim1Store]: treesize reduction 63, result has 20.3 percent of original size [2021-12-14 13:47:18,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22241 treesize of output 21464