./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const4.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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:16:32,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:16:32,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:16:32,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:16:33,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:16:33,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:16:33,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:16:33,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:16:33,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:16:33,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:16:33,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:16:33,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:16:33,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:16:33,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:16:33,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:16:33,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:16:33,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:16:33,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:16:33,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:16:33,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:16:33,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:16:33,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:16:33,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:16:33,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:16:33,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:16:33,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:16:33,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:16:33,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:16:33,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:16:33,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:16:33,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:16:33,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:16:33,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:16:33,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:16:33,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:16:33,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:16:33,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:16:33,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:16:33,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:16:33,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:16:33,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:16:33,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:16:33,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:16:33,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:16:33,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:16:33,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:16:33,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:16:33,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:16:33,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:16:33,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:16:33,082 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:16:33,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:16:33,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:16:33,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:16:33,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:16:33,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:16:33,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:16:33,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:16:33,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:16:33,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:16:33,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:16:33,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:16:33,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:16:33,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:16:33,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:16:33,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:16:33,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:16:33,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:16:33,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:16:33,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:16:33,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:16:33,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:16:33,086 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:16:33,086 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:16:33,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:16:33,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:16:33,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2021-12-22 08:16:33,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:16:33,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:16:33,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:16:33,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:16:33,273 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:16:33,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-12-22 08:16:33,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a39e632be/5266470ef0dc4cef8f5e9df69cf311d3/FLAG2e573e703 [2021-12-22 08:16:33,687 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:16:33,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2021-12-22 08:16:33,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a39e632be/5266470ef0dc4cef8f5e9df69cf311d3/FLAG2e573e703 [2021-12-22 08:16:33,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a39e632be/5266470ef0dc4cef8f5e9df69cf311d3 [2021-12-22 08:16:33,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:16:33,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:16:33,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:16:33,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:16:33,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:16:33,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb151d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33, skipping insertion in model container [2021-12-22 08:16:33,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:16:33,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:16:33,850 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c[406,419] [2021-12-22 08:16:33,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:16:33,885 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:16:33,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c[406,419] [2021-12-22 08:16:33,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:16:33,923 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:16:33,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33 WrapperNode [2021-12-22 08:16:33,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:16:33,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:16:33,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:16:33,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:16:33,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,958 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2021-12-22 08:16:33,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:16:33,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:16:33,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:16:33,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:16:33,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:16:33,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:16:33,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:16:33,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:16:33,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (1/1) ... [2021-12-22 08:16:33,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:16:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:16:34,028 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) [2021-12-22 08:16:34,061 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 [2021-12-22 08:16:34,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:16:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:16:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:16:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 08:16:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:16:34,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:16:34,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:16:34,128 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:16:34,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:16:34,298 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:16:34,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:16:34,302 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-22 08:16:34,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:16:34 BoogieIcfgContainer [2021-12-22 08:16:34,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:16:34,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:16:34,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:16:34,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:16:34,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:16:33" (1/3) ... [2021-12-22 08:16:34,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3807aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:16:34, skipping insertion in model container [2021-12-22 08:16:34,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:33" (2/3) ... [2021-12-22 08:16:34,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3807aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:16:34, skipping insertion in model container [2021-12-22 08:16:34,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:16:34" (3/3) ... [2021-12-22 08:16:34,309 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2021-12-22 08:16:34,312 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:16:34,312 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:16:34,341 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:16:34,345 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 [2021-12-22 08:16:34,346 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:16:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 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) [2021-12-22 08:16:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:16:34,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:34,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:34,360 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-12-22 08:16:34,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:34,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504344204] [2021-12-22 08:16:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:34,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:16:34,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504344204] [2021-12-22 08:16:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504344204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:16:34,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:16:34,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:16:34,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706027799] [2021-12-22 08:16:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:16:34,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:16:34,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:16:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:16:34,511 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 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) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2021-12-22 08:16:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:34,529 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-12-22 08:16:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:16:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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 23 [2021-12-22 08:16:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:34,536 INFO L225 Difference]: With dead ends: 71 [2021-12-22 08:16:34,536 INFO L226 Difference]: Without dead ends: 33 [2021-12-22 08:16:34,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:16:34,543 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:34,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:16:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-22 08:16:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-22 08:16:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2021-12-22 08:16:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-22 08:16:34,587 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-12-22 08:16:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:34,587 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-22 08:16:34,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 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) [2021-12-22 08:16:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-22 08:16:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:16:34,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:34,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:34,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:16:34,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-12-22 08:16:34,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:34,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961848497] [2021-12-22 08:16:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:34,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:16:34,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961848497] [2021-12-22 08:16:34,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961848497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:16:34,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:16:34,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:16:34,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890771359] [2021-12-22 08:16:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:16:34,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:16:34,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:16:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:16:34,665 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-12-22 08:16:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:34,727 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-22 08:16:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:16:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-12-22 08:16:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:34,730 INFO L225 Difference]: With dead ends: 63 [2021-12-22 08:16:34,730 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 08:16:34,731 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 [2021-12-22 08:16:34,733 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:34,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:16:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 08:16:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-22 08:16:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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) [2021-12-22 08:16:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-22 08:16:34,742 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-12-22 08:16:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:34,743 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-22 08:16:34,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-12-22 08:16:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-22 08:16:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 08:16:34,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:34,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:34,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:16:34,746 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-12-22 08:16:34,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:34,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592347906] [2021-12-22 08:16:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:34,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:16:34,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592347906] [2021-12-22 08:16:34,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592347906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:16:34,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:16:34,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:16:34,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590560793] [2021-12-22 08:16:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:16:34,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:16:34,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:16:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:16:34,826 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-12-22 08:16:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:34,919 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-12-22 08:16:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:16:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 25 [2021-12-22 08:16:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:34,921 INFO L225 Difference]: With dead ends: 76 [2021-12-22 08:16:34,921 INFO L226 Difference]: Without dead ends: 51 [2021-12-22 08:16:34,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:16:34,923 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:34,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:16:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-22 08:16:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-12-22 08:16:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 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) [2021-12-22 08:16:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-22 08:16:34,931 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-12-22 08:16:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:34,931 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-22 08:16:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-12-22 08:16:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-22 08:16:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:16:34,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:34,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:34,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:16:34,935 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-12-22 08:16:34,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818903860] [2021-12-22 08:16:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:34,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 08:16:35,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818903860] [2021-12-22 08:16:35,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818903860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:16:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837362338] [2021-12-22 08:16:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:35,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:35,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:16:35,019 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) [2021-12-22 08:16:35,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:16:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:16:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:16:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 08:16:35,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:16:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 08:16:35,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837362338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:16:35,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:16:35,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 08:16:35,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384197546] [2021-12-22 08:16:35,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:16:35,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:16:35,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:16:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:16:35,342 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2021-12-22 08:16:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:35,401 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-12-22 08:16:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:16:35,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 41 [2021-12-22 08:16:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:35,402 INFO L225 Difference]: With dead ends: 81 [2021-12-22 08:16:35,402 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 08:16:35,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:16:35,403 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:35,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:16:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 08:16:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-22 08:16:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 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) [2021-12-22 08:16:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-22 08:16:35,408 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-12-22 08:16:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:35,408 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-22 08:16:35,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2021-12-22 08:16:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-22 08:16:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:16:35,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:35,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:35,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:16:35,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:35,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-12-22 08:16:35,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:35,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301315985] [2021-12-22 08:16:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:35,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 08:16:35,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:35,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301315985] [2021-12-22 08:16:35,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301315985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:16:35,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549180751] [2021-12-22 08:16:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:16:35,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:16:35,701 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) [2021-12-22 08:16:35,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:16:35,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:16:35,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:16:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:16:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:16:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 08:16:35,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:16:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 08:16:35,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549180751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:16:35,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:16:35,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-22 08:16:35,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344753152] [2021-12-22 08:16:35,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:16:35,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:16:35,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:16:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:16:35,908 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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) [2021-12-22 08:16:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:36,007 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-12-22 08:16:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:16:36,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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 43 [2021-12-22 08:16:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:36,008 INFO L225 Difference]: With dead ends: 101 [2021-12-22 08:16:36,008 INFO L226 Difference]: Without dead ends: 69 [2021-12-22 08:16:36,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:16:36,009 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:36,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:16:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-22 08:16:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-22 08:16:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 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) [2021-12-22 08:16:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-22 08:16:36,014 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-12-22 08:16:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-22 08:16:36,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 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) [2021-12-22 08:16:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-22 08:16:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 08:16:36,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:36,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:36,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:16:36,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:36,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-12-22 08:16:36,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445899383] [2021-12-22 08:16:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:36,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:16:37,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445899383] [2021-12-22 08:16:37,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445899383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:16:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592172378] [2021-12-22 08:16:37,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:16:37,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:37,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:16:37,453 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) [2021-12-22 08:16:37,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:16:37,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 08:16:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:16:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-22 08:16:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:16:39,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:16:39,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 29 [2021-12-22 08:16:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:16:39,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:16:50,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 08:16:50,791 INFO L387 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 74 treesize of output 103 [2021-12-22 08:16:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:16:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592172378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:16:53,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:16:53,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 28] total 68 [2021-12-22 08:16:53,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424015948] [2021-12-22 08:16:53,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:16:53,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-22 08:16:53,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-22 08:16:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4080, Unknown=2, NotChecked=0, Total=4556 [2021-12-22 08:16:53,059 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 68 states, 68 states have (on average 2.485294117647059) internal successors, (169), 68 states have internal predecessors, (169), 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) [2021-12-22 08:16:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:56,466 INFO L93 Difference]: Finished difference Result 210 states and 244 transitions. [2021-12-22 08:16:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-22 08:16:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.485294117647059) internal successors, (169), 68 states have internal predecessors, (169), 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 59 [2021-12-22 08:16:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:56,469 INFO L225 Difference]: With dead ends: 210 [2021-12-22 08:16:56,469 INFO L226 Difference]: Without dead ends: 206 [2021-12-22 08:16:56,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 76 SyntacticMatches, 39 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 5449 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1351, Invalid=12927, Unknown=2, NotChecked=0, Total=14280 [2021-12-22 08:16:56,473 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 832 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:56,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 93 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 531 Invalid, 0 Unknown, 832 Unchecked, 0.3s Time] [2021-12-22 08:16:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-22 08:16:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 101. [2021-12-22 08:16:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 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) [2021-12-22 08:16:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-22 08:16:56,485 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2021-12-22 08:16:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:56,485 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-22 08:16:56,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.485294117647059) internal successors, (169), 68 states have internal predecessors, (169), 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) [2021-12-22 08:16:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-22 08:16:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 08:16:56,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:56,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:56,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 08:16:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:56,705 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-12-22 08:16:56,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877407463] [2021-12-22 08:16:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:56,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 08:16:56,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877407463] [2021-12-22 08:16:56,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877407463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:16:56,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409807985] [2021-12-22 08:16:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:16:56,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:56,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:16:56,779 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) [2021-12-22 08:16:56,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:16:56,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:16:56,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:16:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:16:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:16:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 08:16:56,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:16:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 08:16:57,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409807985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:16:57,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:16:57,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-22 08:16:57,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452881676] [2021-12-22 08:16:57,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:16:57,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:16:57,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:16:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:16:57,052 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-12-22 08:16:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:57,291 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2021-12-22 08:16:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 08:16:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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 61 [2021-12-22 08:16:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:57,295 INFO L225 Difference]: With dead ends: 233 [2021-12-22 08:16:57,295 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 08:16:57,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-22 08:16:57,296 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:57,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 44 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:16:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 08:16:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-12-22 08:16:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 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) [2021-12-22 08:16:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-12-22 08:16:57,310 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2021-12-22 08:16:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:57,310 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-12-22 08:16:57,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-12-22 08:16:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-12-22 08:16:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 08:16:57,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:57,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:57,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:16:57,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:57,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2021-12-22 08:16:57,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:57,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352663745] [2021-12-22 08:16:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:57,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:16:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 08:16:57,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:16:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352663745] [2021-12-22 08:16:57,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352663745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:16:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703348333] [2021-12-22 08:16:57,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:16:57,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:57,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:16:57,624 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) [2021-12-22 08:16:57,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 08:16:57,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-22 08:16:57,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:16:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 08:16:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:16:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 08:16:57,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:16:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 08:16:57,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703348333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:16:57,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:16:57,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-22 08:16:57,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320639249] [2021-12-22 08:16:57,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:16:57,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:16:57,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:16:57,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:16:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:16:57,948 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2021-12-22 08:16:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:16:58,148 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2021-12-22 08:16:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:16:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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 63 [2021-12-22 08:16:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:16:58,149 INFO L225 Difference]: With dead ends: 126 [2021-12-22 08:16:58,149 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 08:16:58,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-22 08:16:58,151 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 185 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:16:58,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 25 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:16:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 08:16:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-12-22 08:16:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 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) [2021-12-22 08:16:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-22 08:16:58,156 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-12-22 08:16:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:16:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-22 08:16:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2021-12-22 08:16:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-22 08:16:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 08:16:58,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:16:58,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:16:58,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 08:16:58,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:16:58,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:16:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:16:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-12-22 08:16:58,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:16:58,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892010926] [2021-12-22 08:16:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:16:58,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:16:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:17:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:17:02,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:17:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892010926] [2021-12-22 08:17:02,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892010926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:17:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904416046] [2021-12-22 08:17:02,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 08:17:02,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:17:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:17:02,242 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) [2021-12-22 08:17:02,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 08:17:02,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-22 08:17:02,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:17:02,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-22 08:17:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:17:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:17:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 08:17:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 08:17:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 08:17:07,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 08:17:07,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 08:17:07,206 INFO L353 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2021-12-22 08:17:07,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 28 [2021-12-22 08:17:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:17:07,304 INFO L328 TraceCheckSpWp]: Computing backward predicates...