./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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 valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 528fbc32d9aa1d8a4eedfd9ab07830e3af97eea6ef37fe4df10e8aa3c9d21936 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:19:41,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:19:41,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:19:41,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:19:41,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:19:41,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:19:41,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:19:41,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:19:41,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:19:41,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:19:41,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:19:41,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:19:41,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:19:41,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:19:41,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:19:41,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:19:41,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:19:41,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:19:41,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:19:41,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:19:41,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:19:41,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:19:41,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:19:41,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:19:41,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:19:41,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:19:41,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:19:41,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:19:41,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:19:41,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:19:41,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:19:41,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:19:41,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:19:41,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:19:41,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:19:41,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:19:41,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:19:41,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:19:41,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:19:41,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:19:41,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:19:41,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-12-18 19:19:41,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:19:41,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:19:41,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:19:41,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:19:41,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:19:41,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:19:41,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:19:41,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:19:41,682 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:19:41,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:19:41,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:19:41,683 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:19:41,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:19:41,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:19:41,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:19:41,683 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:19:41,684 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:19:41,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:19:41,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:19:41,684 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:19:41,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:19:41,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:19:41,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:19:41,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:19:41,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:19:41,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:19:41,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:19:41,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:19:41,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:19:41,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:19:41,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 528fbc32d9aa1d8a4eedfd9ab07830e3af97eea6ef37fe4df10e8aa3c9d21936 [2021-12-18 19:19:41,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:19:41,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:19:41,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:19:41,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:19:41,922 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:19:41,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-12-18 19:19:41,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb1320d7/e60709d3554d43aeb2540cd404d0a034/FLAGf667e5358 [2021-12-18 19:19:42,396 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:19:42,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-12-18 19:19:42,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb1320d7/e60709d3554d43aeb2540cd404d0a034/FLAGf667e5358 [2021-12-18 19:19:42,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb1320d7/e60709d3554d43aeb2540cd404d0a034 [2021-12-18 19:19:42,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:19:42,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:19:42,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:19:42,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:19:42,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:19:42,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276ad2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42, skipping insertion in model container [2021-12-18 19:19:42,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:19:42,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:19:42,658 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/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-12-18 19:19:42,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:19:42,667 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:19:42,703 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/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-12-18 19:19:42,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:19:42,723 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:19:42,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42 WrapperNode [2021-12-18 19:19:42,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:19:42,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:19:42,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:19:42,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:19:42,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,762 INFO L137 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 90 [2021-12-18 19:19:42,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:19:42,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:19:42,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:19:42,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:19:42,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:19:42,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:19:42,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:19:42,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:19:42,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (1/1) ... [2021-12-18 19:19:42,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:19:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:42,828 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) [2021-12-18 19:19:42,832 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 [2021-12-18 19:19:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 19:19:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 19:19:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 19:19:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 19:19:42,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:19:42,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 19:19:42,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:19:42,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:19:42,942 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:19:42,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:19:43,068 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:19:43,072 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:19:43,073 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 19:19:43,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:19:43 BoogieIcfgContainer [2021-12-18 19:19:43,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:19:43,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:19:43,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:19:43,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:19:43,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:19:42" (1/3) ... [2021-12-18 19:19:43,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f764eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:19:43, skipping insertion in model container [2021-12-18 19:19:43,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:19:42" (2/3) ... [2021-12-18 19:19:43,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f764eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:19:43, skipping insertion in model container [2021-12-18 19:19:43,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:19:43" (3/3) ... [2021-12-18 19:19:43,091 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-12-18 19:19:43,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:19:43,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-12-18 19:19:43,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:19:43,128 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-18 19:19:43,129 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-12-18 19:19:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 40 states have internal predecessors, (51), 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) [2021-12-18 19:19:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:19:43,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,149 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1819225437, now seen corresponding path program 1 times [2021-12-18 19:19:43,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168852885] [2021-12-18 19:19:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:43,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168852885] [2021-12-18 19:19:43,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168852885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:43,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:43,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:19:43,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431954922] [2021-12-18 19:19:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 19:19:43,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 19:19:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 19:19:43,326 INFO L87 Difference]: Start difference. First operand has 41 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 40 states have internal predecessors, (51), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-18 19:19:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,335 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-18 19:19:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 19:19:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-12-18 19:19:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,341 INFO L225 Difference]: With dead ends: 41 [2021-12-18 19:19:43,341 INFO L226 Difference]: Without dead ends: 38 [2021-12-18 19:19:43,343 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 [2021-12-18 19:19:43,345 INFO L933 BasicCegarLoop]: 46 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, 46 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 [2021-12-18 19:19:43,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-18 19:19:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-18 19:19:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 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) [2021-12-18 19:19:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-18 19:19:43,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 7 [2021-12-18 19:19:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:43,368 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-18 19:19:43,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-18 19:19:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-18 19:19:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:19:43,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:19:43,370 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1213452566, now seen corresponding path program 1 times [2021-12-18 19:19:43,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:43,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252683722] [2021-12-18 19:19:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:43,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252683722] [2021-12-18 19:19:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252683722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:43,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:43,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:19:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502749315] [2021-12-18 19:19:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:19:43,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:19:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:19:43,451 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,491 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-12-18 19:19:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:19:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:19:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,493 INFO L225 Difference]: With dead ends: 64 [2021-12-18 19:19:43,494 INFO L226 Difference]: Without dead ends: 64 [2021-12-18 19:19:43,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:19:43,495 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:43,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 84 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-18 19:19:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2021-12-18 19:19:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 36 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) [2021-12-18 19:19:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-18 19:19:43,503 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 9 [2021-12-18 19:19:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:43,504 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-18 19:19:43,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-18 19:19:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:19:43,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:19:43,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1213452567, now seen corresponding path program 1 times [2021-12-18 19:19:43,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:43,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650115539] [2021-12-18 19:19:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:43,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:43,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650115539] [2021-12-18 19:19:43,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650115539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:43,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:43,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:19:43,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145147188] [2021-12-18 19:19:43,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:19:43,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:19:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:19:43,555 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,589 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-12-18 19:19:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:19:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 19:19:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,592 INFO L225 Difference]: With dead ends: 63 [2021-12-18 19:19:43,592 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 19:19:43,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:19:43,598 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 30 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:43,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 19:19:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2021-12-18 19:19:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 35 states have internal predecessors, (40), 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) [2021-12-18 19:19:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-18 19:19:43,606 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 9 [2021-12-18 19:19:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:43,606 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-18 19:19:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-18 19:19:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:19:43,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:19:43,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2104757995, now seen corresponding path program 1 times [2021-12-18 19:19:43,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:43,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166581444] [2021-12-18 19:19:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:43,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:43,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166581444] [2021-12-18 19:19:43,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166581444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:43,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:43,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:19:43,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636110406] [2021-12-18 19:19:43,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:19:43,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:19:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:19:43,683 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,737 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-12-18 19:19:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:19:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 19:19:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,738 INFO L225 Difference]: With dead ends: 62 [2021-12-18 19:19:43,739 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 19:19:43,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:19:43,745 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:43,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 120 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 19:19:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2021-12-18 19:19:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-18 19:19:43,757 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 11 [2021-12-18 19:19:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:43,757 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-18 19:19:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-18 19:19:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:19:43,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:19:43,760 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -619476383, now seen corresponding path program 1 times [2021-12-18 19:19:43,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:43,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873221330] [2021-12-18 19:19:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:43,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873221330] [2021-12-18 19:19:43,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873221330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:43,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:43,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:19:43,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152449071] [2021-12-18 19:19:43,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:19:43,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:43,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:19:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:19:43,808 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-18 19:19:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,826 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-12-18 19:19:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:19:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-12-18 19:19:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,829 INFO L225 Difference]: With dead ends: 78 [2021-12-18 19:19:43,830 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 19:19:43,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:19:43,831 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 40 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:43,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 120 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 19:19:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-12-18 19:19:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 44 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) [2021-12-18 19:19:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-18 19:19:43,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2021-12-18 19:19:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:43,837 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-18 19:19:43,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-12-18 19:19:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-18 19:19:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:19:43,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:43,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:43,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:19:43,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:43,842 INFO L85 PathProgramCache]: Analyzing trace with hash 347063660, now seen corresponding path program 1 times [2021-12-18 19:19:43,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953379683] [2021-12-18 19:19:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:43,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:43,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953379683] [2021-12-18 19:19:43,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953379683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:43,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:43,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:19:43,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842395297] [2021-12-18 19:19:43,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:43,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:19:43,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:43,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:19:43,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:19:43,914 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-12-18 19:19:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:43,996 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-12-18 19:19:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:19:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 15 [2021-12-18 19:19:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:43,998 INFO L225 Difference]: With dead ends: 89 [2021-12-18 19:19:43,998 INFO L226 Difference]: Without dead ends: 89 [2021-12-18 19:19:43,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:19:43,999 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 169 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:44,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 152 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:19:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-18 19:19:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2021-12-18 19:19:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 46 states have internal predecessors, (56), 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) [2021-12-18 19:19:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-18 19:19:44,004 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-12-18 19:19:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:44,004 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-18 19:19:44,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-12-18 19:19:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-18 19:19:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:19:44,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:44,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:44,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:19:44,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash 347063661, now seen corresponding path program 1 times [2021-12-18 19:19:44,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:44,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168857667] [2021-12-18 19:19:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:44,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:44,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168857667] [2021-12-18 19:19:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168857667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:44,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415101887] [2021-12-18 19:19:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:44,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:44,068 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) [2021-12-18 19:19:44,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:19:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:44,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-18 19:19:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:44,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:44,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415101887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:44,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:19:44,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-18 19:19:44,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750311314] [2021-12-18 19:19:44,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:44,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:19:44,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:19:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:19:44,303 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-12-18 19:19:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:44,381 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2021-12-18 19:19:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:19:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 15 [2021-12-18 19:19:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:44,382 INFO L225 Difference]: With dead ends: 92 [2021-12-18 19:19:44,382 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 19:19:44,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:19:44,383 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 138 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:44,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 100 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 19:19:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 47. [2021-12-18 19:19:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 46 states have internal predecessors, (53), 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) [2021-12-18 19:19:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-18 19:19:44,386 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 15 [2021-12-18 19:19:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:44,386 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-18 19:19:44,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-12-18 19:19:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-18 19:19:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 19:19:44,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:44,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:44,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 19:19:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:44,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1541743515, now seen corresponding path program 2 times [2021-12-18 19:19:44,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:44,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875033947] [2021-12-18 19:19:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:19:44,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875033947] [2021-12-18 19:19:44,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875033947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:44,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:44,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:19:44,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087872581] [2021-12-18 19:19:44,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:44,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:19:44,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:19:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:19:44,672 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-18 19:19:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:44,730 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-12-18 19:19:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:19:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 [2021-12-18 19:19:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:44,732 INFO L225 Difference]: With dead ends: 67 [2021-12-18 19:19:44,732 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 19:19:44,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:19:44,732 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:44,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 73 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 19:19:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-12-18 19:19:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.368421052631579) internal successors, (52), 46 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) [2021-12-18 19:19:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-12-18 19:19:44,735 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 23 [2021-12-18 19:19:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:44,735 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-12-18 19:19:44,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-12-18 19:19:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-12-18 19:19:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:19:44,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:44,736 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:44,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:19:44,737 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash -300839492, now seen corresponding path program 1 times [2021-12-18 19:19:44,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:44,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305282029] [2021-12-18 19:19:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:19:44,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:44,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305282029] [2021-12-18 19:19:44,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305282029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:19:44,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:19:44,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:19:44,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647442140] [2021-12-18 19:19:44,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:19:44,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:19:44,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:19:44,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:19:44,783 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-12-18 19:19:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:44,832 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-18 19:19:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:19:44,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 26 [2021-12-18 19:19:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:44,833 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:19:44,833 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:19:44,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:19:44,834 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 96 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:44,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 89 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:19:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:19:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-18 19:19:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 46 states have internal predecessors, (51), 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) [2021-12-18 19:19:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-18 19:19:44,846 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 26 [2021-12-18 19:19:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:44,847 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-18 19:19:44,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-12-18 19:19:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-18 19:19:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:19:44,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:44,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:44,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:19:44,848 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash -299207194, now seen corresponding path program 1 times [2021-12-18 19:19:44,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:44,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418435508] [2021-12-18 19:19:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:19:44,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418435508] [2021-12-18 19:19:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418435508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477248302] [2021-12-18 19:19:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:44,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:45,013 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) [2021-12-18 19:19:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:19:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:19:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:45,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:45,149 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:19:45,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:19:45,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:45,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:45,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:19:45,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 19:19:45,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:45,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-18 19:19:45,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-18 19:19:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:45,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477248302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:45,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:19:45,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-12-18 19:19:45,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723970951] [2021-12-18 19:19:45,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:45,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:19:45,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:19:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:19:45,651 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:46,110 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-12-18 19:19:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:19:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-18 19:19:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:46,111 INFO L225 Difference]: With dead ends: 84 [2021-12-18 19:19:46,111 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 19:19:46,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:19:46,112 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 483 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:46,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 280 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 247 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-12-18 19:19:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 19:19:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 50. [2021-12-18 19:19:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 49 states have internal predecessors, (56), 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) [2021-12-18 19:19:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-18 19:19:46,114 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 26 [2021-12-18 19:19:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:46,114 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-18 19:19:46,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-18 19:19:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 19:19:46,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:46,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:46,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:46,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 19:19:46,316 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash -299207193, now seen corresponding path program 1 times [2021-12-18 19:19:46,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558648639] [2021-12-18 19:19:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:46,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:46,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558648639] [2021-12-18 19:19:46,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558648639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417166984] [2021-12-18 19:19:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:46,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:46,464 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) [2021-12-18 19:19:46,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:19:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 19:19:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:46,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:46,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:46,699 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 19:19:46,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-18 19:19:46,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-18 19:19:46,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:46,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:19:46,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-18 19:19:46,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:19:46,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:19:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:46,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:47,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-18 19:19:47,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-18 19:19:47,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-18 19:19:47,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2021-12-18 19:19:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:47,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417166984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:47,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:19:47,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-12-18 19:19:47,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913971240] [2021-12-18 19:19:47,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:47,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 19:19:47,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 19:19:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:19:47,779 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 28 states have internal predecessors, (58), 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) [2021-12-18 19:19:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:49,167 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-12-18 19:19:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:19:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 28 states have internal predecessors, (58), 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 26 [2021-12-18 19:19:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:49,168 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:19:49,168 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 19:19:49,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:19:49,169 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 950 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 285 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 255 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2021-12-18 19:19:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 19:19:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 50. [2021-12-18 19:19:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 49 states have internal predecessors, (55), 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) [2021-12-18 19:19:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-12-18 19:19:49,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26 [2021-12-18 19:19:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:49,172 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-12-18 19:19:49,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 28 states have internal predecessors, (58), 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) [2021-12-18 19:19:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-12-18 19:19:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:19:49,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:49,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:49,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-18 19:19:49,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:49,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:49,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1625978896, now seen corresponding path program 1 times [2021-12-18 19:19:49,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:49,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896500744] [2021-12-18 19:19:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:49,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:49,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:49,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896500744] [2021-12-18 19:19:49,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896500744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224682224] [2021-12-18 19:19:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:49,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:49,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:49,460 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) [2021-12-18 19:19:49,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:19:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:19:49,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:49,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:49,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:49,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:19:49,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-18 19:19:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:49,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:49,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-18 19:19:49,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:19:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:19:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224682224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:19:49,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:19:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2021-12-18 19:19:49,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992313763] [2021-12-18 19:19:49,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:19:49,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:19:49,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:19:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:19:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:19:49,898 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:19:50,239 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-12-18 19:19:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:19:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 19:19:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:19:50,251 INFO L225 Difference]: With dead ends: 51 [2021-12-18 19:19:50,252 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 19:19:50,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:19:50,252 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 251 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:19:50,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 256 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2021-12-18 19:19:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 19:19:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-12-18 19:19:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 49 states have internal predecessors, (54), 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) [2021-12-18 19:19:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-18 19:19:50,254 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2021-12-18 19:19:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:19:50,254 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-18 19:19:50,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:19:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-18 19:19:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:19:50,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:19:50,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:19:50,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:19:50,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:50,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:19:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:19:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346598, now seen corresponding path program 2 times [2021-12-18 19:19:50,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:19:50,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751480303] [2021-12-18 19:19:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:19:50,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:19:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:19:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:50,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:19:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751480303] [2021-12-18 19:19:50,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751480303] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:19:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751066824] [2021-12-18 19:19:50,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:19:50,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:19:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:19:50,582 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) [2021-12-18 19:19:50,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:19:50,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:19:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:19:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 19:19:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:19:50,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:50,672 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:19:50,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:19:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:19:50,771 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-12-18 19:19:50,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-12-18 19:19:50,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-12-18 19:19:50,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:19:51,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:19:51,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:19:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:19:51,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:19:51,175 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-12-18 19:19:51,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 35 [2021-12-18 19:19:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:19:51,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:19:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-12-18 19:19:51,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2021-12-18 19:20:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:00,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751066824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:00,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:00,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2021-12-18 19:20:00,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321703043] [2021-12-18 19:20:00,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:00,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:20:00,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:20:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1202, Unknown=4, NotChecked=0, Total=1332 [2021-12-18 19:20:00,198 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 37 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) [2021-12-18 19:20:08,613 WARN L227 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 119 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:20:19,327 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 155 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 19:20:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:19,353 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-12-18 19:20:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:20:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 37 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) Word has length 29 [2021-12-18 19:20:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:19,353 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:20:19,353 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:20:19,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=283, Invalid=1605, Unknown=4, NotChecked=0, Total=1892 [2021-12-18 19:20:19,354 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 88 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:19,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 436 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 245 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2021-12-18 19:20:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:20:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-12-18 19:20:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 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) [2021-12-18 19:20:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-12-18 19:20:19,356 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 29 [2021-12-18 19:20:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:19,356 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-12-18 19:20:19,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 37 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) [2021-12-18 19:20:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-12-18 19:20:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:20:19,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:19,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:19,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:19,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 19:20:19,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:20:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1624346597, now seen corresponding path program 2 times [2021-12-18 19:20:19,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333556667] [2021-12-18 19:20:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:19,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:19,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333556667] [2021-12-18 19:20:19,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333556667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146296151] [2021-12-18 19:20:19,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:19,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:19,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:19,865 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) [2021-12-18 19:20:19,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:20:19,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:19,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-18 19:20:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:19,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:20:19,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:20:20,002 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:20:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-18 19:20:20,023 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:20,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:20:20,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:20:20,206 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-18 19:20:20,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:20,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-18 19:20:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-12-18 19:20:20,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 19:20:20,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:20,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:20,705 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-12-18 19:20:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 48 [2021-12-18 19:20:20,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:20,714 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 19:20:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-18 19:20:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:20,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:28,288 INFO L354 Elim1Store]: treesize reduction 94, result has 7.8 percent of original size [2021-12-18 19:20:28,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1220 treesize of output 988 [2021-12-18 19:20:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:28,303 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-12-18 19:20:28,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 2477 treesize of output 1726 [2021-12-18 19:20:28,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1730 treesize of output 1634 [2021-12-18 19:20:28,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:20:28,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1620 treesize of output 1488 [2021-12-18 19:20:28,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 19:20:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2021-12-18 19:20:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:28,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1207 treesize of output 1205 [2021-12-18 19:20:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:20:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 240 [2021-12-18 19:20:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:30,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146296151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:30,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:30,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2021-12-18 19:20:30,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091550515] [2021-12-18 19:20:30,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:30,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 19:20:30,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 19:20:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1682, Unknown=3, NotChecked=0, Total=1806 [2021-12-18 19:20:30,466 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 43 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:47,221 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse31 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_#res#1.base|)) (.cse30 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse29 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|))) (let ((.cse19 (select .cse29 0)) (.cse17 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (.cse1 (select .cse30 0)) (.cse2 (select .cse31 0)) (.cse28 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse25 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_#res#1.base|))) (let ((.cse5 (select .cse31 |c_ULTIMATE.start_sll_create_#res#1.offset|)) (.cse6 (select .cse25 |c_ULTIMATE.start_sll_create_#res#1.offset|)) (.cse0 (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (.cse18 (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0)) (.cse21 (select .cse30 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse22 (select .cse28 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) 0)) (.cse13 (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (.cse23 (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse14 (select (select |c_#memory_$Pointer$.base| .cse1) 0)) (.cse26 (select |c_#length| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse15 (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0)) (.cse24 (select .cse17 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|)) (.cse16 (select (select |c_#memory_$Pointer$.base| .cse19) 0)) (.cse4 (select .cse29 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (and (= .cse0 1) (= (select (select |c_#memory_$Pointer$.offset| .cse1) 0) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse2) 0) 0) (not (= .cse3 .cse2)) (<= 4 (select |c_#length| .cse1)) (= 1 (select |c_#valid| .cse4)) (= (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6) 0) (forall ((|ULTIMATE.start_sll_length_~head#1.offset| Int)) (or (let ((.cse11 (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse8 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (let ((.cse9 (select .cse8 |ULTIMATE.start_sll_length_~head#1.offset|)) (.cse10 (select .cse11 |ULTIMATE.start_sll_length_~head#1.offset|))) (let ((.cse7 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse11) .cse9) .cse10))) (and (<= (+ .cse7 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse8) .cse9) .cse10))) (<= 0 .cse7))))) (< |ULTIMATE.start_sll_length_~head#1.offset| 0) (< (select |c_#length| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) (+ |ULTIMATE.start_sll_length_~head#1.offset| 4)))) (not (= .cse3 |c_ULTIMATE.start_sll_create_#res#1.base|)) (let ((.cse12 (select (select |c_#memory_$Pointer$.base| .cse5) .cse6))) (or (and (= |c_ULTIMATE.start_sll_create_#res#1.offset| 0) (= .cse12 |c_ULTIMATE.start_sll_create_#res#1.base|)) (<= 4 (select |c_#length| .cse12)))) (= 1 .cse0) (<= (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 4) .cse13) (not (= .cse14 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= 1 (select |c_#valid| .cse1)) .cse15 (<= 4 (select |c_#length| .cse16)) (not (= .cse16 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (<= 4 (select |c_#length| .cse14)) (<= (select |c_#length| |c_ULTIMATE.start_sll_create_#res#1.base|) 4) (= (select .cse17 0) 0) .cse18 (= 0 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|) (not (= .cse4 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|)) (= (select (select |c_#memory_$Pointer$.offset| .cse19) 0) 0) (let ((.cse20 (select (select |c_#memory_$Pointer$.base| .cse21) .cse22))) (or (<= 4 (select |c_#length| .cse20)) (and .cse18 (= .cse20 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (= (select (select |c_#memory_$Pointer$.offset| .cse21) .cse22) 0) (= 1 .cse23) (<= 4 (select |c_#length| .cse3)) (<= .cse13 4) (= (select (select |c_#memory_$Pointer$.offset| .cse4) .cse24) 0) (= .cse24 0) (not (= .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select .cse25 0) 0) (<= .cse26 4) (= .cse23 1) (not (= .cse14 .cse1)) (<= 4 .cse26) (let ((.cse27 (select (select |c_#memory_$Pointer$.base| .cse4) .cse24))) (or (and (= .cse27 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse15) (<= 4 (select |c_#length| .cse27)))) (= (select .cse28 0) 0) (not (= .cse16 .cse19)) (<= 4 (select |c_#length| .cse4)))))) is different from false [2021-12-18 19:20:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:47,557 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-12-18 19:20:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:20:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 19:20:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:47,558 INFO L225 Difference]: With dead ends: 56 [2021-12-18 19:20:47,558 INFO L226 Difference]: Without dead ends: 56 [2021-12-18 19:20:47,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=4, NotChecked=104, Total=2970 [2021-12-18 19:20:47,559 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:47,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 691 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 358 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2021-12-18 19:20:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-18 19:20:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-12-18 19:20:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 52 states have internal predecessors, (58), 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) [2021-12-18 19:20:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-12-18 19:20:47,561 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 29 [2021-12-18 19:20:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:47,561 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-12-18 19:20:47,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 43 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:20:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-12-18 19:20:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 19:20:47,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:47,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:47,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:47,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:47,762 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:20:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:47,762 INFO L85 PathProgramCache]: Analyzing trace with hash 485421372, now seen corresponding path program 2 times [2021-12-18 19:20:47,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:47,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735448314] [2021-12-18 19:20:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:47,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:20:47,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:47,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735448314] [2021-12-18 19:20:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735448314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063599693] [2021-12-18 19:20:47,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:20:47,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:47,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:47,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:20:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:20:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 19:20:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:20:48,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:20:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:20:48,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063599693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:20:48,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:20:48,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-18 19:20:48,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174181204] [2021-12-18 19:20:48,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:20:48,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:20:48,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:20:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:20:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:20:48,115 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2021-12-18 19:20:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:20:48,188 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-12-18 19:20:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:20:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-18 19:20:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:20:48,190 INFO L225 Difference]: With dead ends: 121 [2021-12-18 19:20:48,190 INFO L226 Difference]: Without dead ends: 121 [2021-12-18 19:20:48,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-18 19:20:48,192 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:20:48,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 319 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:20:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-18 19:20:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 82. [2021-12-18 19:20:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 81 states have internal predecessors, (91), 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) [2021-12-18 19:20:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-12-18 19:20:48,196 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 32 [2021-12-18 19:20:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:20:48,197 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-12-18 19:20:48,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 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) [2021-12-18 19:20:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-12-18 19:20:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 19:20:48,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:20:48,200 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:20:48,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:20:48,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:48,412 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-12-18 19:20:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:20:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash 487053670, now seen corresponding path program 3 times [2021-12-18 19:20:48,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:20:48,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521785667] [2021-12-18 19:20:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:20:48,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:20:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:20:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:48,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:20:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521785667] [2021-12-18 19:20:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521785667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:20:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017041145] [2021-12-18 19:20:48,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:20:48,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:20:48,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:20:48,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:20:48,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:20:48,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:20:48,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:20:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-18 19:20:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:20:48,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:20:48,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:20:48,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:20:49,005 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-18 19:20:49,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-18 19:20:49,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-18 19:20:49,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-18 19:20:49,199 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-18 19:20:49,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-18 19:20:49,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:49,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:49,311 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-18 19:20:49,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-12-18 19:20:49,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2021-12-18 19:20:55,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:55,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:55,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:55,102 INFO L354 Elim1Store]: treesize reduction 122, result has 8.3 percent of original size [2021-12-18 19:20:55,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 152 treesize of output 81 [2021-12-18 19:20:55,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:20:55,117 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-18 19:20:55,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 31 [2021-12-18 19:20:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:20:55,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:21:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:05,548 INFO L354 Elim1Store]: treesize reduction 619, result has 24.0 percent of original size [2021-12-18 19:21:05,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 27307 treesize of output 20222 [2021-12-18 19:21:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:21:07,087 INFO L354 Elim1Store]: treesize reduction 998, result has 32.3 percent of original size [2021-12-18 19:21:07,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 15 new quantified variables, introduced 80 case distinctions, treesize of input 157834 treesize of output 68701 [2021-12-18 19:21:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:08,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:08,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 61252 treesize of output 57328 [2021-12-18 19:21:09,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:21:09,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:21:09,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 57031 treesize of output 54741 [2021-12-18 19:22:02,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 19:22:02,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 19:22:07,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:22:07,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-12-18 19:33:47,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 19:33:47,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-18 19:34:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:34:01,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:34:01,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 675 treesize of output 675 Killed by 15