./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:23:32,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:23:32,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:23:32,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:23:32,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:23:32,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:23:32,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:23:32,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:23:32,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:23:32,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:23:32,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:23:32,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:23:32,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:23:32,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:23:32,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:23:32,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:23:32,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:23:32,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:23:32,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:23:32,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:23:32,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:23:32,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:23:32,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:23:32,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:23:32,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:23:32,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:23:32,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:23:32,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:23:32,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:23:32,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:23:32,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:23:32,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:23:32,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:23:32,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:23:32,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:23:32,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:23:32,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:23:32,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:23:32,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:23:32,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:23:32,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:23:32,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:23:32,834 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:23:32,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:23:32,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:23:32,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:23:32,836 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:23:32,836 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:23:32,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:23:32,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:23:32,837 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:23:32,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:23:32,838 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:23:32,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:23:32,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:23:32,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:23:32,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:23:32,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:23:32,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:23:32,839 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:23:32,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:23:32,839 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:23:32,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:23:32,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:23:32,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:23:32,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:23:32,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:23:32,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:23:32,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:23:32,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:23:32,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:23:32,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:23:32,841 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:23:32,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:23:32,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:23:32,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:23:32,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 [2021-12-17 03:23:33,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:23:33,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:23:33,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:23:33,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:23:33,081 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:23:33,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-12-17 03:23:33,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4058c40/8c5e2b0ee80043089dba73a03a00e72d/FLAGf5943aa44 [2021-12-17 03:23:33,598 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:23:33,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-12-17 03:23:33,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4058c40/8c5e2b0ee80043089dba73a03a00e72d/FLAGf5943aa44 [2021-12-17 03:23:33,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4058c40/8c5e2b0ee80043089dba73a03a00e72d [2021-12-17 03:23:33,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:23:33,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:23:33,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:23:33,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:23:33,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:23:33,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:23:33" (1/1) ... [2021-12-17 03:23:33,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7560e589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:33, skipping insertion in model container [2021-12-17 03:23:33,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:23:33" (1/1) ... [2021-12-17 03:23:33,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:23:33,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:23:34,149 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/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-12-17 03:23:34,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:23:34,175 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:23:34,283 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/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-12-17 03:23:34,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:23:34,302 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:23:34,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34 WrapperNode [2021-12-17 03:23:34,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:23:34,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:23:34,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:23:34,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:23:34,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,380 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 810 [2021-12-17 03:23:34,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:23:34,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:23:34,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:23:34,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:23:34,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:23:34,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:23:34,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:23:34,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:23:34,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (1/1) ... [2021-12-17 03:23:34,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:23:34,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:23:34,537 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) [2021-12-17 03:23:34,565 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 [2021-12-17 03:23:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:23:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:23:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:23:34,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:23:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:23:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:23:34,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:23:34,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:23:34,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:23:34,681 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:23:34,682 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:23:34,692 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:23:37,069 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:23:37,069 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:23:37,069 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:23:37,075 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:23:37,075 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:23:37,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:23:37 BoogieIcfgContainer [2021-12-17 03:23:37,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:23:37,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:23:37,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:23:37,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:23:37,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:23:33" (1/3) ... [2021-12-17 03:23:37,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da71bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:23:37, skipping insertion in model container [2021-12-17 03:23:37,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:34" (2/3) ... [2021-12-17 03:23:37,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da71bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:23:37, skipping insertion in model container [2021-12-17 03:23:37,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:23:37" (3/3) ... [2021-12-17 03:23:37,082 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-2.c [2021-12-17 03:23:37,086 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:23:37,086 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:23:37,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:23:37,121 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:23:37,121 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:23:37,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 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) [2021-12-17 03:23:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 03:23:37,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:37,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:37,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453347, now seen corresponding path program 1 times [2021-12-17 03:23:37,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:37,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820745439] [2021-12-17 03:23:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:37,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:37,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:37,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820745439] [2021-12-17 03:23:37,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820745439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:37,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:37,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:37,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728537596] [2021-12-17 03:23:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:37,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:37,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:37,511 INFO L87 Difference]: Start difference. First operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2021-12-17 03:23:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:38,049 INFO L93 Difference]: Finished difference Result 343 states and 586 transitions. [2021-12-17 03:23:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:38,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 46 [2021-12-17 03:23:38,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:38,063 INFO L225 Difference]: With dead ends: 343 [2021-12-17 03:23:38,063 INFO L226 Difference]: Without dead ends: 174 [2021-12-17 03:23:38,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:38,071 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 36 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:38,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 639 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:23:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-17 03:23:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2021-12-17 03:23:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5833333333333333) internal successors, (247), 156 states have internal predecessors, (247), 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) [2021-12-17 03:23:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 247 transitions. [2021-12-17 03:23:38,122 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 247 transitions. Word has length 46 [2021-12-17 03:23:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:38,122 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 247 transitions. [2021-12-17 03:23:38,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2021-12-17 03:23:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 247 transitions. [2021-12-17 03:23:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:23:38,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:38,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:38,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:23:38,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -747421952, now seen corresponding path program 1 times [2021-12-17 03:23:38,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:38,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529213901] [2021-12-17 03:23:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:38,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:38,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529213901] [2021-12-17 03:23:38,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529213901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:38,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:38,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:38,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75586056] [2021-12-17 03:23:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:38,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:38,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:38,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:38,255 INFO L87 Difference]: Start difference. First operand 157 states and 247 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2021-12-17 03:23:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:38,877 INFO L93 Difference]: Finished difference Result 310 states and 482 transitions. [2021-12-17 03:23:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 03:23:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:38,879 INFO L225 Difference]: With dead ends: 310 [2021-12-17 03:23:38,879 INFO L226 Difference]: Without dead ends: 174 [2021-12-17 03:23:38,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:38,881 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 24 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:38,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 525 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:23:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-17 03:23:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2021-12-17 03:23:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5769230769230769) internal successors, (246), 156 states have internal predecessors, (246), 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) [2021-12-17 03:23:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 246 transitions. [2021-12-17 03:23:38,893 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 246 transitions. Word has length 59 [2021-12-17 03:23:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:38,894 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 246 transitions. [2021-12-17 03:23:38,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2021-12-17 03:23:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 246 transitions. [2021-12-17 03:23:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:23:38,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:38,903 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:38,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:23:38,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1178870543, now seen corresponding path program 1 times [2021-12-17 03:23:38,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75614468] [2021-12-17 03:23:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:38,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:39,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75614468] [2021-12-17 03:23:39,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75614468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:39,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:39,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:39,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300127457] [2021-12-17 03:23:39,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:39,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:39,044 INFO L87 Difference]: Start difference. First operand 157 states and 246 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:41,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:41,450 INFO L93 Difference]: Finished difference Result 418 states and 659 transitions. [2021-12-17 03:23:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-17 03:23:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:41,452 INFO L225 Difference]: With dead ends: 418 [2021-12-17 03:23:41,452 INFO L226 Difference]: Without dead ends: 282 [2021-12-17 03:23:41,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:41,454 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:41,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 386 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 03:23:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-17 03:23:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 168. [2021-12-17 03:23:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.562874251497006) internal successors, (261), 167 states have internal predecessors, (261), 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) [2021-12-17 03:23:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2021-12-17 03:23:41,464 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 60 [2021-12-17 03:23:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:41,464 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2021-12-17 03:23:41,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2021-12-17 03:23:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:23:41,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:41,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:41,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:23:41,466 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash -456664837, now seen corresponding path program 1 times [2021-12-17 03:23:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564858041] [2021-12-17 03:23:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:41,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:41,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564858041] [2021-12-17 03:23:41,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564858041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:41,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:41,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:41,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68681463] [2021-12-17 03:23:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:41,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:41,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:41,539 INFO L87 Difference]: Start difference. First operand 168 states and 261 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:43,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:43,910 INFO L93 Difference]: Finished difference Result 429 states and 673 transitions. [2021-12-17 03:23:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-17 03:23:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:43,912 INFO L225 Difference]: With dead ends: 429 [2021-12-17 03:23:43,912 INFO L226 Difference]: Without dead ends: 282 [2021-12-17 03:23:43,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:43,914 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 164 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:43,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 386 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-17 03:23:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2021-12-17 03:23:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5535714285714286) internal successors, (261), 168 states have internal predecessors, (261), 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) [2021-12-17 03:23:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 261 transitions. [2021-12-17 03:23:43,922 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 261 transitions. Word has length 60 [2021-12-17 03:23:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:43,922 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 261 transitions. [2021-12-17 03:23:43,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 261 transitions. [2021-12-17 03:23:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:23:43,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:43,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:43,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:23:43,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1102481148, now seen corresponding path program 1 times [2021-12-17 03:23:43,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279659646] [2021-12-17 03:23:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:43,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:43,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279659646] [2021-12-17 03:23:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279659646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:43,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:43,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35984286] [2021-12-17 03:23:43,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:43,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:43,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:43,997 INFO L87 Difference]: Start difference. First operand 169 states and 261 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:46,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:46,411 INFO L93 Difference]: Finished difference Result 429 states and 671 transitions. [2021-12-17 03:23:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-17 03:23:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:46,412 INFO L225 Difference]: With dead ends: 429 [2021-12-17 03:23:46,412 INFO L226 Difference]: Without dead ends: 281 [2021-12-17 03:23:46,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:46,414 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 157 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:46,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 388 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 03:23:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-17 03:23:46,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 175. [2021-12-17 03:23:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5574712643678161) internal successors, (271), 174 states have internal predecessors, (271), 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) [2021-12-17 03:23:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 271 transitions. [2021-12-17 03:23:46,419 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 271 transitions. Word has length 60 [2021-12-17 03:23:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:46,420 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 271 transitions. [2021-12-17 03:23:46,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 271 transitions. [2021-12-17 03:23:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:23:46,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:46,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:46,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:23:46,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1222199364, now seen corresponding path program 1 times [2021-12-17 03:23:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073128704] [2021-12-17 03:23:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:46,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:46,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073128704] [2021-12-17 03:23:46,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073128704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:46,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:46,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:46,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696379972] [2021-12-17 03:23:46,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:46,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:46,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:46,511 INFO L87 Difference]: Start difference. First operand 175 states and 271 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:48,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:48,712 INFO L93 Difference]: Finished difference Result 342 states and 530 transitions. [2021-12-17 03:23:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-17 03:23:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:48,714 INFO L225 Difference]: With dead ends: 342 [2021-12-17 03:23:48,714 INFO L226 Difference]: Without dead ends: 188 [2021-12-17 03:23:48,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:48,715 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 19 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:48,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-17 03:23:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2021-12-17 03:23:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5517241379310345) internal successors, (270), 174 states have internal predecessors, (270), 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) [2021-12-17 03:23:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 270 transitions. [2021-12-17 03:23:48,719 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 270 transitions. Word has length 60 [2021-12-17 03:23:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:48,719 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 270 transitions. [2021-12-17 03:23:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 270 transitions. [2021-12-17 03:23:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:23:48,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:48,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:48,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:23:48,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1571330423, now seen corresponding path program 1 times [2021-12-17 03:23:48,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:48,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551773535] [2021-12-17 03:23:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:48,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:48,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:48,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551773535] [2021-12-17 03:23:48,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551773535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:48,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:48,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427305134] [2021-12-17 03:23:48,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:48,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:48,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:48,802 INFO L87 Difference]: Start difference. First operand 175 states and 270 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-12-17 03:23:50,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:51,107 INFO L93 Difference]: Finished difference Result 435 states and 679 transitions. [2021-12-17 03:23:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 03:23:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:51,108 INFO L225 Difference]: With dead ends: 435 [2021-12-17 03:23:51,108 INFO L226 Difference]: Without dead ends: 281 [2021-12-17 03:23:51,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:51,109 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 161 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:51,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 388 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-17 03:23:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 175. [2021-12-17 03:23:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5402298850574712) internal successors, (268), 174 states have internal predecessors, (268), 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) [2021-12-17 03:23:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 268 transitions. [2021-12-17 03:23:51,113 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 268 transitions. Word has length 61 [2021-12-17 03:23:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:51,113 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 268 transitions. [2021-12-17 03:23:51,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2021-12-17 03:23:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 268 transitions. [2021-12-17 03:23:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:23:51,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:51,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:51,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:23:51,114 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash 567611862, now seen corresponding path program 1 times [2021-12-17 03:23:51,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:51,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808819208] [2021-12-17 03:23:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:51,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:51,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808819208] [2021-12-17 03:23:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808819208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:51,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:51,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:51,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002855973] [2021-12-17 03:23:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:51,202 INFO L87 Difference]: Start difference. First operand 175 states and 268 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:53,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:53,388 INFO L93 Difference]: Finished difference Result 342 states and 526 transitions. [2021-12-17 03:23:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:23:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:53,390 INFO L225 Difference]: With dead ends: 342 [2021-12-17 03:23:53,390 INFO L226 Difference]: Without dead ends: 188 [2021-12-17 03:23:53,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:53,391 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 20 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:53,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-17 03:23:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2021-12-17 03:23:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5344827586206897) internal successors, (267), 174 states have internal predecessors, (267), 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) [2021-12-17 03:23:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 267 transitions. [2021-12-17 03:23:53,394 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 267 transitions. Word has length 62 [2021-12-17 03:23:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:53,394 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 267 transitions. [2021-12-17 03:23:53,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 267 transitions. [2021-12-17 03:23:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 03:23:53,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:53,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:53,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:23:53,400 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash 70045362, now seen corresponding path program 1 times [2021-12-17 03:23:53,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:53,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553162770] [2021-12-17 03:23:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:53,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:53,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553162770] [2021-12-17 03:23:53,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553162770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:53,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:53,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:53,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167453836] [2021-12-17 03:23:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:53,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:53,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:53,522 INFO L87 Difference]: Start difference. First operand 175 states and 267 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-12-17 03:23:55,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:55,882 INFO L93 Difference]: Finished difference Result 435 states and 675 transitions. [2021-12-17 03:23:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 03:23:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:55,885 INFO L225 Difference]: With dead ends: 435 [2021-12-17 03:23:55,885 INFO L226 Difference]: Without dead ends: 281 [2021-12-17 03:23:55,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:55,887 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 158 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:55,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 388 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-17 03:23:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 175. [2021-12-17 03:23:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5229885057471264) internal successors, (265), 174 states have internal predecessors, (265), 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) [2021-12-17 03:23:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 265 transitions. [2021-12-17 03:23:55,896 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 265 transitions. Word has length 63 [2021-12-17 03:23:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:55,896 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 265 transitions. [2021-12-17 03:23:55,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-12-17 03:23:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 265 transitions. [2021-12-17 03:23:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 03:23:55,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:55,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:55,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:23:55,897 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1718161846, now seen corresponding path program 1 times [2021-12-17 03:23:55,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:55,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963969063] [2021-12-17 03:23:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:55,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:55,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:55,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963969063] [2021-12-17 03:23:55,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963969063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:55,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:55,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:55,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978318521] [2021-12-17 03:23:55,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:55,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:55,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:55,987 INFO L87 Difference]: Start difference. First operand 175 states and 265 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-12-17 03:23:57,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:58,265 INFO L93 Difference]: Finished difference Result 454 states and 699 transitions. [2021-12-17 03:23:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 03:23:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:58,267 INFO L225 Difference]: With dead ends: 454 [2021-12-17 03:23:58,267 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 03:23:58,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:58,268 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 134 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:58,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 390 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 03:23:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 215. [2021-12-17 03:23:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.5560747663551402) internal successors, (333), 214 states have internal predecessors, (333), 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) [2021-12-17 03:23:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 333 transitions. [2021-12-17 03:23:58,272 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 333 transitions. Word has length 63 [2021-12-17 03:23:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:58,273 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 333 transitions. [2021-12-17 03:23:58,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-12-17 03:23:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 333 transitions. [2021-12-17 03:23:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 03:23:58,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:58,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:58,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:23:58,273 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:58,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1581555535, now seen corresponding path program 1 times [2021-12-17 03:23:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:58,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803539330] [2021-12-17 03:23:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:58,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:58,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803539330] [2021-12-17 03:23:58,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803539330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:58,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:58,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:58,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259984555] [2021-12-17 03:23:58,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:58,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:58,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:58,357 INFO L87 Difference]: Start difference. First operand 215 states and 333 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-12-17 03:24:00,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:00,676 INFO L93 Difference]: Finished difference Result 515 states and 808 transitions. [2021-12-17 03:24:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2021-12-17 03:24:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:00,678 INFO L225 Difference]: With dead ends: 515 [2021-12-17 03:24:00,678 INFO L226 Difference]: Without dead ends: 321 [2021-12-17 03:24:00,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:00,679 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 133 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:00,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 416 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-17 03:24:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 237. [2021-12-17 03:24:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.5932203389830508) internal successors, (376), 236 states have internal predecessors, (376), 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) [2021-12-17 03:24:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 376 transitions. [2021-12-17 03:24:00,685 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 376 transitions. Word has length 64 [2021-12-17 03:24:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:00,685 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 376 transitions. [2021-12-17 03:24:00,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-12-17 03:24:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 376 transitions. [2021-12-17 03:24:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 03:24:00,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:00,686 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:00,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:24:00,687 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash 68960760, now seen corresponding path program 1 times [2021-12-17 03:24:00,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465080392] [2021-12-17 03:24:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:00,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:24:00,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465080392] [2021-12-17 03:24:00,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465080392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:00,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:00,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:00,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614247359] [2021-12-17 03:24:00,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:00,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:00,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:00,771 INFO L87 Difference]: Start difference. First operand 237 states and 376 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-17 03:24:02,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:02,940 INFO L93 Difference]: Finished difference Result 613 states and 982 transitions. [2021-12-17 03:24:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:02,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2021-12-17 03:24:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:02,942 INFO L225 Difference]: With dead ends: 613 [2021-12-17 03:24:02,942 INFO L226 Difference]: Without dead ends: 397 [2021-12-17 03:24:02,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:02,943 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 139 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:02,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 400 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-17 03:24:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 301. [2021-12-17 03:24:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.6066666666666667) internal successors, (482), 300 states have internal predecessors, (482), 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) [2021-12-17 03:24:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 482 transitions. [2021-12-17 03:24:02,948 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 482 transitions. Word has length 92 [2021-12-17 03:24:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:02,948 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 482 transitions. [2021-12-17 03:24:02,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-17 03:24:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 482 transitions. [2021-12-17 03:24:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 03:24:02,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:02,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:02,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:24:02,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 384518479, now seen corresponding path program 1 times [2021-12-17 03:24:02,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:02,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306940728] [2021-12-17 03:24:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:02,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 03:24:03,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306940728] [2021-12-17 03:24:03,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306940728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:03,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:03,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:03,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751442253] [2021-12-17 03:24:03,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:03,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:03,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:03,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:03,049 INFO L87 Difference]: Start difference. First operand 301 states and 482 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:05,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:05,261 INFO L93 Difference]: Finished difference Result 622 states and 998 transitions. [2021-12-17 03:24:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-17 03:24:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:05,263 INFO L225 Difference]: With dead ends: 622 [2021-12-17 03:24:05,263 INFO L226 Difference]: Without dead ends: 342 [2021-12-17 03:24:05,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:05,264 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 29 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:05,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 549 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-17 03:24:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 323. [2021-12-17 03:24:05,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5993788819875776) internal successors, (515), 322 states have internal predecessors, (515), 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) [2021-12-17 03:24:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 515 transitions. [2021-12-17 03:24:05,269 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 515 transitions. Word has length 98 [2021-12-17 03:24:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:05,269 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 515 transitions. [2021-12-17 03:24:05,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 515 transitions. [2021-12-17 03:24:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:24:05,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:05,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:05,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:24:05,270 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1159095599, now seen corresponding path program 1 times [2021-12-17 03:24:05,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:05,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357997862] [2021-12-17 03:24:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:05,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:24:05,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357997862] [2021-12-17 03:24:05,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357997862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:05,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:05,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:05,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399524054] [2021-12-17 03:24:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:05,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:05,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:05,350 INFO L87 Difference]: Start difference. First operand 323 states and 515 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:07,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:07,643 INFO L93 Difference]: Finished difference Result 749 states and 1195 transitions. [2021-12-17 03:24:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-17 03:24:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:07,645 INFO L225 Difference]: With dead ends: 749 [2021-12-17 03:24:07,645 INFO L226 Difference]: Without dead ends: 447 [2021-12-17 03:24:07,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:07,646 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 156 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:07,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 416 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-17 03:24:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 339. [2021-12-17 03:24:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.5769230769230769) internal successors, (533), 338 states have internal predecessors, (533), 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) [2021-12-17 03:24:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 533 transitions. [2021-12-17 03:24:07,652 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 533 transitions. Word has length 105 [2021-12-17 03:24:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:07,652 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 533 transitions. [2021-12-17 03:24:07,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 533 transitions. [2021-12-17 03:24:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 03:24:07,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:07,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:07,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:24:07,653 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1438627761, now seen corresponding path program 1 times [2021-12-17 03:24:07,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:07,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81633537] [2021-12-17 03:24:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:07,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:24:07,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81633537] [2021-12-17 03:24:07,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81633537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:07,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:07,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:07,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996555916] [2021-12-17 03:24:07,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:07,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:07,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:07,743 INFO L87 Difference]: Start difference. First operand 339 states and 533 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-12-17 03:24:09,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:09,920 INFO L93 Difference]: Finished difference Result 674 states and 1064 transitions. [2021-12-17 03:24:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 106 [2021-12-17 03:24:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:09,922 INFO L225 Difference]: With dead ends: 674 [2021-12-17 03:24:09,922 INFO L226 Difference]: Without dead ends: 356 [2021-12-17 03:24:09,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:09,923 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 32 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:09,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 553 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-17 03:24:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 339. [2021-12-17 03:24:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.5739644970414202) internal successors, (532), 338 states have internal predecessors, (532), 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) [2021-12-17 03:24:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 532 transitions. [2021-12-17 03:24:09,928 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 532 transitions. Word has length 106 [2021-12-17 03:24:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:09,928 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 532 transitions. [2021-12-17 03:24:09,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-12-17 03:24:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 532 transitions. [2021-12-17 03:24:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 03:24:09,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:09,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:09,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:24:09,929 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:09,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 48860342, now seen corresponding path program 1 times [2021-12-17 03:24:09,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:09,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901673802] [2021-12-17 03:24:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:09,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 03:24:09,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901673802] [2021-12-17 03:24:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901673802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605660103] [2021-12-17 03:24:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:09,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:09,998 INFO L87 Difference]: Start difference. First operand 339 states and 532 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-12-17 03:24:12,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:12,167 INFO L93 Difference]: Finished difference Result 664 states and 1049 transitions. [2021-12-17 03:24:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 114 [2021-12-17 03:24:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:12,169 INFO L225 Difference]: With dead ends: 664 [2021-12-17 03:24:12,169 INFO L226 Difference]: Without dead ends: 346 [2021-12-17 03:24:12,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:12,170 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 27 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:12,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 567 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-17 03:24:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2021-12-17 03:24:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.5710059171597632) internal successors, (531), 338 states have internal predecessors, (531), 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) [2021-12-17 03:24:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 531 transitions. [2021-12-17 03:24:12,176 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 531 transitions. Word has length 114 [2021-12-17 03:24:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:12,176 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 531 transitions. [2021-12-17 03:24:12,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-12-17 03:24:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 531 transitions. [2021-12-17 03:24:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 03:24:12,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:12,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:12,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:24:12,178 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash 766254903, now seen corresponding path program 1 times [2021-12-17 03:24:12,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:12,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50152730] [2021-12-17 03:24:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:12,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:24:12,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:12,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50152730] [2021-12-17 03:24:12,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50152730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:12,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:12,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:12,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683411350] [2021-12-17 03:24:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:12,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:12,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:12,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:12,286 INFO L87 Difference]: Start difference. First operand 339 states and 531 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-12-17 03:24:14,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:14,547 INFO L93 Difference]: Finished difference Result 757 states and 1188 transitions. [2021-12-17 03:24:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 120 [2021-12-17 03:24:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:14,549 INFO L225 Difference]: With dead ends: 757 [2021-12-17 03:24:14,549 INFO L226 Difference]: Without dead ends: 439 [2021-12-17 03:24:14,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:14,550 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 90 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:14,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 521 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-17 03:24:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 378. [2021-12-17 03:24:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.5755968169761274) internal successors, (594), 377 states have internal predecessors, (594), 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) [2021-12-17 03:24:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 594 transitions. [2021-12-17 03:24:14,557 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 594 transitions. Word has length 120 [2021-12-17 03:24:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:14,558 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 594 transitions. [2021-12-17 03:24:14,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-12-17 03:24:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 594 transitions. [2021-12-17 03:24:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 03:24:14,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:14,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:14,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:24:14,559 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash 793320505, now seen corresponding path program 1 times [2021-12-17 03:24:14,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:14,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546111264] [2021-12-17 03:24:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:14,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 03:24:14,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:14,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546111264] [2021-12-17 03:24:14,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546111264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:14,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:14,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:14,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780627599] [2021-12-17 03:24:14,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:14,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:14,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:14,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:14,649 INFO L87 Difference]: Start difference. First operand 378 states and 594 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2021-12-17 03:24:16,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:16,883 INFO L93 Difference]: Finished difference Result 783 states and 1232 transitions. [2021-12-17 03:24:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 120 [2021-12-17 03:24:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:16,885 INFO L225 Difference]: With dead ends: 783 [2021-12-17 03:24:16,885 INFO L226 Difference]: Without dead ends: 426 [2021-12-17 03:24:16,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:16,885 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 36 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:16,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 645 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-17 03:24:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 402. [2021-12-17 03:24:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.571072319201995) internal successors, (630), 401 states have internal predecessors, (630), 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) [2021-12-17 03:24:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 630 transitions. [2021-12-17 03:24:16,892 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 630 transitions. Word has length 120 [2021-12-17 03:24:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:16,892 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 630 transitions. [2021-12-17 03:24:16,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2021-12-17 03:24:16,893 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 630 transitions. [2021-12-17 03:24:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 03:24:16,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:16,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:16,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:24:16,894 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 183105856, now seen corresponding path program 1 times [2021-12-17 03:24:16,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802328275] [2021-12-17 03:24:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:16,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:24:17,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:17,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802328275] [2021-12-17 03:24:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802328275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:17,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:17,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:17,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678502373] [2021-12-17 03:24:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:17,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:17,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:17,011 INFO L87 Difference]: Start difference. First operand 402 states and 630 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2021-12-17 03:24:19,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:19,252 INFO L93 Difference]: Finished difference Result 841 states and 1318 transitions. [2021-12-17 03:24:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:19,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 121 [2021-12-17 03:24:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:19,254 INFO L225 Difference]: With dead ends: 841 [2021-12-17 03:24:19,254 INFO L226 Difference]: Without dead ends: 460 [2021-12-17 03:24:19,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:19,255 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 85 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 515 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-17 03:24:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 403. [2021-12-17 03:24:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.5696517412935322) internal successors, (631), 402 states have internal predecessors, (631), 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) [2021-12-17 03:24:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 631 transitions. [2021-12-17 03:24:19,262 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 631 transitions. Word has length 121 [2021-12-17 03:24:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:19,262 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 631 transitions. [2021-12-17 03:24:19,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2021-12-17 03:24:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 631 transitions. [2021-12-17 03:24:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:24:19,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:19,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:19,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:24:19,264 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -808576153, now seen corresponding path program 1 times [2021-12-17 03:24:19,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:19,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069479222] [2021-12-17 03:24:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:19,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:24:19,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069479222] [2021-12-17 03:24:19,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069479222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:19,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:19,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:19,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117158237] [2021-12-17 03:24:19,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:19,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:19,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:19,385 INFO L87 Difference]: Start difference. First operand 403 states and 631 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2021-12-17 03:24:21,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:21,717 INFO L93 Difference]: Finished difference Result 909 states and 1426 transitions. [2021-12-17 03:24:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 128 [2021-12-17 03:24:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:21,719 INFO L225 Difference]: With dead ends: 909 [2021-12-17 03:24:21,719 INFO L226 Difference]: Without dead ends: 527 [2021-12-17 03:24:21,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:21,720 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 128 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:21,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 417 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:21,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-17 03:24:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 446. [2021-12-17 03:24:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5775280898876405) internal successors, (702), 445 states have internal predecessors, (702), 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) [2021-12-17 03:24:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 702 transitions. [2021-12-17 03:24:21,729 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 702 transitions. Word has length 128 [2021-12-17 03:24:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:21,729 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 702 transitions. [2021-12-17 03:24:21,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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) [2021-12-17 03:24:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 702 transitions. [2021-12-17 03:24:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:24:21,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:21,730 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:21,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:24:21,731 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:21,731 INFO L85 PathProgramCache]: Analyzing trace with hash -85973607, now seen corresponding path program 1 times [2021-12-17 03:24:21,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:21,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781763086] [2021-12-17 03:24:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:21,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:24:21,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:21,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781763086] [2021-12-17 03:24:21,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781763086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:21,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:21,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:21,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216617418] [2021-12-17 03:24:21,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:21,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:21,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:21,814 INFO L87 Difference]: Start difference. First operand 446 states and 702 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-17 03:24:23,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:24,065 INFO L93 Difference]: Finished difference Result 926 states and 1457 transitions. [2021-12-17 03:24:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:24,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 128 [2021-12-17 03:24:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:24,067 INFO L225 Difference]: With dead ends: 926 [2021-12-17 03:24:24,067 INFO L226 Difference]: Without dead ends: 501 [2021-12-17 03:24:24,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:24,068 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 104 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:24,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 517 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-17 03:24:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 446. [2021-12-17 03:24:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5752808988764044) internal successors, (701), 445 states have internal predecessors, (701), 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) [2021-12-17 03:24:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 701 transitions. [2021-12-17 03:24:24,074 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 701 transitions. Word has length 128 [2021-12-17 03:24:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:24,074 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 701 transitions. [2021-12-17 03:24:24,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-17 03:24:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 701 transitions. [2021-12-17 03:24:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:24:24,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:24,077 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:24,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:24:24,077 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1790509211, now seen corresponding path program 1 times [2021-12-17 03:24:24,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:24,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663053063] [2021-12-17 03:24:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:24,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:24:24,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663053063] [2021-12-17 03:24:24,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663053063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:24,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:24,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:24,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042986309] [2021-12-17 03:24:24,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:24,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:24,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:24,153 INFO L87 Difference]: Start difference. First operand 446 states and 701 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-17 03:24:26,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:26,476 INFO L93 Difference]: Finished difference Result 955 states and 1500 transitions. [2021-12-17 03:24:26,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:26,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 128 [2021-12-17 03:24:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:26,477 INFO L225 Difference]: With dead ends: 955 [2021-12-17 03:24:26,478 INFO L226 Difference]: Without dead ends: 530 [2021-12-17 03:24:26,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:26,478 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 155 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:26,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 388 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-17 03:24:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 446. [2021-12-17 03:24:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5617977528089888) internal successors, (695), 445 states have internal predecessors, (695), 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) [2021-12-17 03:24:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 695 transitions. [2021-12-17 03:24:26,485 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 695 transitions. Word has length 128 [2021-12-17 03:24:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:26,485 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 695 transitions. [2021-12-17 03:24:26,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-12-17 03:24:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 695 transitions. [2021-12-17 03:24:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 03:24:26,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:26,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:26,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:24:26,486 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1335927152, now seen corresponding path program 1 times [2021-12-17 03:24:26,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:26,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378314121] [2021-12-17 03:24:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:26,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:24:26,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378314121] [2021-12-17 03:24:26,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378314121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:26,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:26,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:26,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100677246] [2021-12-17 03:24:26,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:26,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:26,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:26,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:26,563 INFO L87 Difference]: Start difference. First operand 446 states and 695 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2021-12-17 03:24:28,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:28,851 INFO L93 Difference]: Finished difference Result 955 states and 1488 transitions. [2021-12-17 03:24:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 129 [2021-12-17 03:24:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:28,853 INFO L225 Difference]: With dead ends: 955 [2021-12-17 03:24:28,853 INFO L226 Difference]: Without dead ends: 528 [2021-12-17 03:24:28,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:28,854 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 128 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:28,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 388 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-12-17 03:24:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 448. [2021-12-17 03:24:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.5615212527964206) internal successors, (698), 447 states have internal predecessors, (698), 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) [2021-12-17 03:24:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 698 transitions. [2021-12-17 03:24:28,861 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 698 transitions. Word has length 129 [2021-12-17 03:24:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:28,861 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 698 transitions. [2021-12-17 03:24:28,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2021-12-17 03:24:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 698 transitions. [2021-12-17 03:24:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 03:24:28,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:28,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:28,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:24:28,862 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash 156340894, now seen corresponding path program 1 times [2021-12-17 03:24:28,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:28,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497740628] [2021-12-17 03:24:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:28,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-17 03:24:28,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:28,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497740628] [2021-12-17 03:24:28,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497740628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:28,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:28,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:24:28,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957640235] [2021-12-17 03:24:28,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:28,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:24:28,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:24:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:28,959 INFO L87 Difference]: Start difference. First operand 448 states and 698 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2021-12-17 03:24:30,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:32,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:33,233 INFO L93 Difference]: Finished difference Result 885 states and 1384 transitions. [2021-12-17 03:24:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:24:33,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) Word has length 136 [2021-12-17 03:24:33,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:33,235 INFO L225 Difference]: With dead ends: 885 [2021-12-17 03:24:33,235 INFO L226 Difference]: Without dead ends: 458 [2021-12-17 03:24:33,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:24:33,237 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 164 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:33,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 412 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 03:24:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-12-17 03:24:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 457. [2021-12-17 03:24:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5548245614035088) internal successors, (709), 456 states have internal predecessors, (709), 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) [2021-12-17 03:24:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 709 transitions. [2021-12-17 03:24:33,246 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 709 transitions. Word has length 136 [2021-12-17 03:24:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:33,247 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 709 transitions. [2021-12-17 03:24:33,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2021-12-17 03:24:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 709 transitions. [2021-12-17 03:24:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 03:24:33,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:33,248 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:33,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:24:33,249 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1190817387, now seen corresponding path program 1 times [2021-12-17 03:24:33,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:33,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205060649] [2021-12-17 03:24:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:33,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:24:33,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:33,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205060649] [2021-12-17 03:24:33,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205060649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:33,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:33,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:33,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132773211] [2021-12-17 03:24:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:33,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:33,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:33,327 INFO L87 Difference]: Start difference. First operand 457 states and 709 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-17 03:24:35,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:35,662 INFO L93 Difference]: Finished difference Result 931 states and 1447 transitions. [2021-12-17 03:24:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 137 [2021-12-17 03:24:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:35,664 INFO L225 Difference]: With dead ends: 931 [2021-12-17 03:24:35,664 INFO L226 Difference]: Without dead ends: 495 [2021-12-17 03:24:35,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:35,665 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 89 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:35,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 537 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-17 03:24:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 457. [2021-12-17 03:24:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5526315789473684) internal successors, (708), 456 states have internal predecessors, (708), 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) [2021-12-17 03:24:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 708 transitions. [2021-12-17 03:24:35,681 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 708 transitions. Word has length 137 [2021-12-17 03:24:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:35,681 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 708 transitions. [2021-12-17 03:24:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-17 03:24:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 708 transitions. [2021-12-17 03:24:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 03:24:35,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:35,683 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:35,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:24:35,683 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1485174995, now seen corresponding path program 1 times [2021-12-17 03:24:35,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:35,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881402540] [2021-12-17 03:24:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:35,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:24:35,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:35,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881402540] [2021-12-17 03:24:35,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881402540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:35,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:35,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:35,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833590716] [2021-12-17 03:24:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:35,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:35,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:35,797 INFO L87 Difference]: Start difference. First operand 457 states and 708 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-17 03:24:37,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:37,604 INFO L93 Difference]: Finished difference Result 905 states and 1408 transitions. [2021-12-17 03:24:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 137 [2021-12-17 03:24:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:37,608 INFO L225 Difference]: With dead ends: 905 [2021-12-17 03:24:37,608 INFO L226 Difference]: Without dead ends: 469 [2021-12-17 03:24:37,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:37,609 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 37 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:37,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 631 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 03:24:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-17 03:24:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 457. [2021-12-17 03:24:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5504385964912282) internal successors, (707), 456 states have internal predecessors, (707), 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) [2021-12-17 03:24:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 707 transitions. [2021-12-17 03:24:37,618 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 707 transitions. Word has length 137 [2021-12-17 03:24:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:37,618 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 707 transitions. [2021-12-17 03:24:37,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-17 03:24:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 707 transitions. [2021-12-17 03:24:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:24:37,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:37,620 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:37,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:24:37,620 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:37,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1862166372, now seen corresponding path program 1 times [2021-12-17 03:24:37,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:37,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498760927] [2021-12-17 03:24:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:37,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:24:37,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498760927] [2021-12-17 03:24:37,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498760927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:37,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:37,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649388086] [2021-12-17 03:24:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:37,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:37,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:37,746 INFO L87 Difference]: Start difference. First operand 457 states and 707 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-12-17 03:24:39,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:40,026 INFO L93 Difference]: Finished difference Result 1015 states and 1572 transitions. [2021-12-17 03:24:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 141 [2021-12-17 03:24:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:40,028 INFO L225 Difference]: With dead ends: 1015 [2021-12-17 03:24:40,028 INFO L226 Difference]: Without dead ends: 579 [2021-12-17 03:24:40,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:40,029 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 139 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:40,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 398 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-17 03:24:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 487. [2021-12-17 03:24:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.5411522633744856) internal successors, (749), 486 states have internal predecessors, (749), 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) [2021-12-17 03:24:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 749 transitions. [2021-12-17 03:24:40,037 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 749 transitions. Word has length 141 [2021-12-17 03:24:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:40,037 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 749 transitions. [2021-12-17 03:24:40,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-12-17 03:24:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 749 transitions. [2021-12-17 03:24:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:24:40,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:40,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:40,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:24:40,039 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1102778573, now seen corresponding path program 1 times [2021-12-17 03:24:40,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912298739] [2021-12-17 03:24:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:40,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:24:40,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912298739] [2021-12-17 03:24:40,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912298739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:40,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:40,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:40,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062494973] [2021-12-17 03:24:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:40,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:40,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:40,118 INFO L87 Difference]: Start difference. First operand 487 states and 749 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-12-17 03:24:42,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:42,456 INFO L93 Difference]: Finished difference Result 1033 states and 1588 transitions. [2021-12-17 03:24:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 142 [2021-12-17 03:24:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:42,459 INFO L225 Difference]: With dead ends: 1033 [2021-12-17 03:24:42,459 INFO L226 Difference]: Without dead ends: 567 [2021-12-17 03:24:42,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:42,460 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 145 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:42,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 440 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-12-17 03:24:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 487. [2021-12-17 03:24:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.5267489711934157) internal successors, (742), 486 states have internal predecessors, (742), 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) [2021-12-17 03:24:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 742 transitions. [2021-12-17 03:24:42,492 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 742 transitions. Word has length 142 [2021-12-17 03:24:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:42,493 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 742 transitions. [2021-12-17 03:24:42,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2021-12-17 03:24:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 742 transitions. [2021-12-17 03:24:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:24:42,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:42,494 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:42,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:24:42,495 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1844194602, now seen corresponding path program 1 times [2021-12-17 03:24:42,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819883114] [2021-12-17 03:24:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:42,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:24:42,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:42,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819883114] [2021-12-17 03:24:42,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819883114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:42,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:42,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:42,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976810119] [2021-12-17 03:24:42,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:42,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:42,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:42,597 INFO L87 Difference]: Start difference. First operand 487 states and 742 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2021-12-17 03:24:44,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:44,832 INFO L93 Difference]: Finished difference Result 989 states and 1511 transitions. [2021-12-17 03:24:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:44,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 142 [2021-12-17 03:24:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:44,833 INFO L225 Difference]: With dead ends: 989 [2021-12-17 03:24:44,834 INFO L226 Difference]: Without dead ends: 523 [2021-12-17 03:24:44,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:44,834 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 68 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:44,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 555 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-17 03:24:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 487. [2021-12-17 03:24:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.5246913580246915) internal successors, (741), 486 states have internal predecessors, (741), 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) [2021-12-17 03:24:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 741 transitions. [2021-12-17 03:24:44,842 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 741 transitions. Word has length 142 [2021-12-17 03:24:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:44,842 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 741 transitions. [2021-12-17 03:24:44,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2021-12-17 03:24:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 741 transitions. [2021-12-17 03:24:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:24:44,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:44,844 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:44,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:24:44,844 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2133819471, now seen corresponding path program 1 times [2021-12-17 03:24:44,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:44,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097588742] [2021-12-17 03:24:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:44,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 03:24:44,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097588742] [2021-12-17 03:24:44,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097588742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:44,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:44,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:44,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056169182] [2021-12-17 03:24:44,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:44,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:44,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:44,942 INFO L87 Difference]: Start difference. First operand 487 states and 741 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-12-17 03:24:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:45,002 INFO L93 Difference]: Finished difference Result 1416 states and 2171 transitions. [2021-12-17 03:24:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:45,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 142 [2021-12-17 03:24:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:45,006 INFO L225 Difference]: With dead ends: 1416 [2021-12-17 03:24:45,006 INFO L226 Difference]: Without dead ends: 950 [2021-12-17 03:24:45,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,007 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:45,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 449 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-12-17 03:24:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2021-12-17 03:24:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.5131717597471022) internal successors, (1436), 949 states have internal predecessors, (1436), 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) [2021-12-17 03:24:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1436 transitions. [2021-12-17 03:24:45,024 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1436 transitions. Word has length 142 [2021-12-17 03:24:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:45,025 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1436 transitions. [2021-12-17 03:24:45,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2021-12-17 03:24:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1436 transitions. [2021-12-17 03:24:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:24:45,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:45,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:45,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:24:45,027 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:45,028 INFO L85 PathProgramCache]: Analyzing trace with hash 826677073, now seen corresponding path program 1 times [2021-12-17 03:24:45,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:45,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888299410] [2021-12-17 03:24:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:45,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 03:24:45,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:45,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888299410] [2021-12-17 03:24:45,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888299410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:45,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:45,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:45,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783151482] [2021-12-17 03:24:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:45,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:45,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,103 INFO L87 Difference]: Start difference. First operand 950 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-12-17 03:24:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:45,141 INFO L93 Difference]: Finished difference Result 1906 states and 2884 transitions. [2021-12-17 03:24:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 142 [2021-12-17 03:24:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:45,144 INFO L225 Difference]: With dead ends: 1906 [2021-12-17 03:24:45,144 INFO L226 Difference]: Without dead ends: 977 [2021-12-17 03:24:45,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,146 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:45,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 428 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-17 03:24:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 977. [2021-12-17 03:24:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 1.507172131147541) internal successors, (1471), 976 states have internal predecessors, (1471), 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) [2021-12-17 03:24:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1471 transitions. [2021-12-17 03:24:45,162 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1471 transitions. Word has length 142 [2021-12-17 03:24:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:45,162 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1471 transitions. [2021-12-17 03:24:45,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-12-17 03:24:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1471 transitions. [2021-12-17 03:24:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:24:45,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:45,166 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:45,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:24:45,167 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1314724179, now seen corresponding path program 1 times [2021-12-17 03:24:45,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:45,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575124425] [2021-12-17 03:24:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:45,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 03:24:45,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575124425] [2021-12-17 03:24:45,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575124425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:45,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:45,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:45,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579430336] [2021-12-17 03:24:45,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:45,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:45,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,264 INFO L87 Difference]: Start difference. First operand 977 states and 1471 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-12-17 03:24:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:45,294 INFO L93 Difference]: Finished difference Result 1935 states and 2920 transitions. [2021-12-17 03:24:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 142 [2021-12-17 03:24:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:45,297 INFO L225 Difference]: With dead ends: 1935 [2021-12-17 03:24:45,297 INFO L226 Difference]: Without dead ends: 979 [2021-12-17 03:24:45,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,300 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:45,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 407 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-12-17 03:24:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 979. [2021-12-17 03:24:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.5061349693251533) internal successors, (1473), 978 states have internal predecessors, (1473), 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) [2021-12-17 03:24:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1473 transitions. [2021-12-17 03:24:45,315 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1473 transitions. Word has length 142 [2021-12-17 03:24:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:45,316 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1473 transitions. [2021-12-17 03:24:45,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2021-12-17 03:24:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1473 transitions. [2021-12-17 03:24:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 03:24:45,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:45,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:45,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:24:45,318 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 965845753, now seen corresponding path program 1 times [2021-12-17 03:24:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:45,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654641402] [2021-12-17 03:24:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:45,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:24:45,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654641402] [2021-12-17 03:24:45,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654641402] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:45,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:45,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:45,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006739944] [2021-12-17 03:24:45,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:45,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:45,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,414 INFO L87 Difference]: Start difference. First operand 979 states and 1473 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-17 03:24:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:45,471 INFO L93 Difference]: Finished difference Result 2398 states and 3633 transitions. [2021-12-17 03:24:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 144 [2021-12-17 03:24:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:45,475 INFO L225 Difference]: With dead ends: 2398 [2021-12-17 03:24:45,475 INFO L226 Difference]: Without dead ends: 1442 [2021-12-17 03:24:45,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:45,476 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 157 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:45,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 588 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-12-17 03:24:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1442. [2021-12-17 03:24:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 1.5045107564191533) internal successors, (2168), 1441 states have internal predecessors, (2168), 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) [2021-12-17 03:24:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2168 transitions. [2021-12-17 03:24:45,518 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2168 transitions. Word has length 144 [2021-12-17 03:24:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:45,518 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 2168 transitions. [2021-12-17 03:24:45,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-12-17 03:24:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2168 transitions. [2021-12-17 03:24:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-17 03:24:45,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:45,520 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:45,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:24:45,520 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:45,521 INFO L85 PathProgramCache]: Analyzing trace with hash -313047371, now seen corresponding path program 1 times [2021-12-17 03:24:45,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:45,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475174509] [2021-12-17 03:24:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:45,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 03:24:45,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:45,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475174509] [2021-12-17 03:24:45,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475174509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:45,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:45,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:45,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463090142] [2021-12-17 03:24:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:45,595 INFO L87 Difference]: Start difference. First operand 1442 states and 2168 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2021-12-17 03:24:47,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:47,839 INFO L93 Difference]: Finished difference Result 3041 states and 4567 transitions. [2021-12-17 03:24:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 173 [2021-12-17 03:24:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:47,844 INFO L225 Difference]: With dead ends: 3041 [2021-12-17 03:24:47,844 INFO L226 Difference]: Without dead ends: 1622 [2021-12-17 03:24:47,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:47,845 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 48 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:47,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 657 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-17 03:24:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1526. [2021-12-17 03:24:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.5042622950819673) internal successors, (2294), 1525 states have internal predecessors, (2294), 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) [2021-12-17 03:24:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 2294 transitions. [2021-12-17 03:24:47,887 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 2294 transitions. Word has length 173 [2021-12-17 03:24:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:47,887 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 2294 transitions. [2021-12-17 03:24:47,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2021-12-17 03:24:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 2294 transitions. [2021-12-17 03:24:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 03:24:47,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:47,890 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:47,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:24:47,890 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:47,891 INFO L85 PathProgramCache]: Analyzing trace with hash -570780201, now seen corresponding path program 1 times [2021-12-17 03:24:47,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:47,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362883349] [2021-12-17 03:24:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:47,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-17 03:24:47,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:47,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362883349] [2021-12-17 03:24:47,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362883349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:47,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:47,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:47,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616513958] [2021-12-17 03:24:47,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:47,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:47,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:47,984 INFO L87 Difference]: Start difference. First operand 1526 states and 2294 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2021-12-17 03:24:49,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:50,219 INFO L93 Difference]: Finished difference Result 3095 states and 4654 transitions. [2021-12-17 03:24:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 190 [2021-12-17 03:24:50,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:50,224 INFO L225 Difference]: With dead ends: 3095 [2021-12-17 03:24:50,225 INFO L226 Difference]: Without dead ends: 1592 [2021-12-17 03:24:50,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:50,226 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:50,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 645 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-17 03:24:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1526. [2021-12-17 03:24:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.5022950819672132) internal successors, (2291), 1525 states have internal predecessors, (2291), 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) [2021-12-17 03:24:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 2291 transitions. [2021-12-17 03:24:50,288 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 2291 transitions. Word has length 190 [2021-12-17 03:24:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:50,288 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 2291 transitions. [2021-12-17 03:24:50,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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) [2021-12-17 03:24:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 2291 transitions. [2021-12-17 03:24:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-17 03:24:50,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:50,292 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:24:50,292 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1635136637, now seen corresponding path program 1 times [2021-12-17 03:24:50,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:50,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250443033] [2021-12-17 03:24:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:50,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-17 03:24:50,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:50,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250443033] [2021-12-17 03:24:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250443033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:50,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:50,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:50,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145760144] [2021-12-17 03:24:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:50,387 INFO L87 Difference]: Start difference. First operand 1526 states and 2291 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2021-12-17 03:24:52,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:52,324 INFO L93 Difference]: Finished difference Result 3264 states and 4865 transitions. [2021-12-17 03:24:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 196 [2021-12-17 03:24:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:52,337 INFO L225 Difference]: With dead ends: 3264 [2021-12-17 03:24:52,337 INFO L226 Difference]: Without dead ends: 1761 [2021-12-17 03:24:52,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:52,339 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 144 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:52,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 404 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:24:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-12-17 03:24:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1526. [2021-12-17 03:24:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.4865573770491802) internal successors, (2267), 1525 states have internal predecessors, (2267), 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) [2021-12-17 03:24:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 2267 transitions. [2021-12-17 03:24:52,380 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 2267 transitions. Word has length 196 [2021-12-17 03:24:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:52,380 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 2267 transitions. [2021-12-17 03:24:52,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2021-12-17 03:24:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 2267 transitions. [2021-12-17 03:24:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-17 03:24:52,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:52,383 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:52,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:24:52,383 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1527197181, now seen corresponding path program 1 times [2021-12-17 03:24:52,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:52,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790001349] [2021-12-17 03:24:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:52,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-17 03:24:52,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790001349] [2021-12-17 03:24:52,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790001349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:52,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:52,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:52,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086412649] [2021-12-17 03:24:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:52,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:52,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:52,484 INFO L87 Difference]: Start difference. First operand 1526 states and 2267 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-12-17 03:24:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:52,555 INFO L93 Difference]: Finished difference Result 3520 states and 5254 transitions. [2021-12-17 03:24:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 198 [2021-12-17 03:24:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:52,560 INFO L225 Difference]: With dead ends: 3520 [2021-12-17 03:24:52,560 INFO L226 Difference]: Without dead ends: 2017 [2021-12-17 03:24:52,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:52,564 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 154 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:52,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 590 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-12-17 03:24:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2017. [2021-12-17 03:24:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 1.4856150793650793) internal successors, (2995), 2016 states have internal predecessors, (2995), 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) [2021-12-17 03:24:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2995 transitions. [2021-12-17 03:24:52,616 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2995 transitions. Word has length 198 [2021-12-17 03:24:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:52,617 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 2995 transitions. [2021-12-17 03:24:52,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2021-12-17 03:24:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2995 transitions. [2021-12-17 03:24:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-17 03:24:52,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:52,620 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:52,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:24:52,621 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash -489247903, now seen corresponding path program 1 times [2021-12-17 03:24:52,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:52,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001865770] [2021-12-17 03:24:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:52,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-17 03:24:52,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001865770] [2021-12-17 03:24:52,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001865770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:52,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:52,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:52,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102102151] [2021-12-17 03:24:52,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:52,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:52,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:52,716 INFO L87 Difference]: Start difference. First operand 2017 states and 2995 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:52,813 INFO L93 Difference]: Finished difference Result 4503 states and 6711 transitions. [2021-12-17 03:24:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:52,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-12-17 03:24:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:52,831 INFO L225 Difference]: With dead ends: 4503 [2021-12-17 03:24:52,831 INFO L226 Difference]: Without dead ends: 2509 [2021-12-17 03:24:52,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:52,835 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:52,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:24:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-12-17 03:24:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2509. [2021-12-17 03:24:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 1.4872408293460926) internal successors, (3730), 2508 states have internal predecessors, (3730), 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) [2021-12-17 03:24:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3730 transitions. [2021-12-17 03:24:52,877 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3730 transitions. Word has length 198 [2021-12-17 03:24:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:52,877 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3730 transitions. [2021-12-17 03:24:52,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3730 transitions. [2021-12-17 03:24:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-17 03:24:52,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:52,881 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:52,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:24:52,881 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1541765032, now seen corresponding path program 1 times [2021-12-17 03:24:52,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:52,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470449851] [2021-12-17 03:24:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:52,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 03:24:53,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470449851] [2021-12-17 03:24:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470449851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:53,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:53,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:53,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124100206] [2021-12-17 03:24:53,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:53,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:53,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,004 INFO L87 Difference]: Start difference. First operand 2509 states and 3730 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-17 03:24:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:53,074 INFO L93 Difference]: Finished difference Result 5487 states and 8181 transitions. [2021-12-17 03:24:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 236 [2021-12-17 03:24:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:53,078 INFO L225 Difference]: With dead ends: 5487 [2021-12-17 03:24:53,079 INFO L226 Difference]: Without dead ends: 3001 [2021-12-17 03:24:53,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,082 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 168 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:53,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 382 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-12-17 03:24:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 3001. [2021-12-17 03:24:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 3000 states have (on average 1.4886666666666666) internal successors, (4466), 3000 states have internal predecessors, (4466), 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) [2021-12-17 03:24:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 4466 transitions. [2021-12-17 03:24:53,154 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 4466 transitions. Word has length 236 [2021-12-17 03:24:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:53,154 INFO L470 AbstractCegarLoop]: Abstraction has 3001 states and 4466 transitions. [2021-12-17 03:24:53,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-17 03:24:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 4466 transitions. [2021-12-17 03:24:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-17 03:24:53,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:53,159 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:53,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:24:53,159 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1652360066, now seen corresponding path program 1 times [2021-12-17 03:24:53,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:53,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335265701] [2021-12-17 03:24:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:53,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-17 03:24:53,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335265701] [2021-12-17 03:24:53,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335265701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:53,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:53,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:53,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091432751] [2021-12-17 03:24:53,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:53,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:53,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,261 INFO L87 Difference]: Start difference. First operand 3001 states and 4466 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-17 03:24:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:53,372 INFO L93 Difference]: Finished difference Result 6471 states and 9653 transitions. [2021-12-17 03:24:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 238 [2021-12-17 03:24:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:53,377 INFO L225 Difference]: With dead ends: 6471 [2021-12-17 03:24:53,377 INFO L226 Difference]: Without dead ends: 3493 [2021-12-17 03:24:53,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,380 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 169 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:53,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 381 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:24:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-12-17 03:24:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 3493. [2021-12-17 03:24:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.4899770904925544) internal successors, (5203), 3492 states have internal predecessors, (5203), 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) [2021-12-17 03:24:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5203 transitions. [2021-12-17 03:24:53,431 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5203 transitions. Word has length 238 [2021-12-17 03:24:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:53,432 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 5203 transitions. [2021-12-17 03:24:53,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-12-17 03:24:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5203 transitions. [2021-12-17 03:24:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-17 03:24:53,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:53,437 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:53,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:24:53,437 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash 29939523, now seen corresponding path program 1 times [2021-12-17 03:24:53,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:53,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103919556] [2021-12-17 03:24:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:53,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-12-17 03:24:53,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:53,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103919556] [2021-12-17 03:24:53,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103919556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:53,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:53,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:53,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714907889] [2021-12-17 03:24:53,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:53,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:53,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:53,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:53,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,589 INFO L87 Difference]: Start difference. First operand 3493 states and 5203 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-12-17 03:24:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:53,665 INFO L93 Difference]: Finished difference Result 7448 states and 11116 transitions. [2021-12-17 03:24:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:53,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 271 [2021-12-17 03:24:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:53,671 INFO L225 Difference]: With dead ends: 7448 [2021-12-17 03:24:53,672 INFO L226 Difference]: Without dead ends: 3978 [2021-12-17 03:24:53,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,677 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:53,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 587 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2021-12-17 03:24:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 3978. [2021-12-17 03:24:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.489564998742771) internal successors, (5924), 3977 states have internal predecessors, (5924), 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) [2021-12-17 03:24:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5924 transitions. [2021-12-17 03:24:53,757 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5924 transitions. Word has length 271 [2021-12-17 03:24:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:53,758 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 5924 transitions. [2021-12-17 03:24:53,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-12-17 03:24:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5924 transitions. [2021-12-17 03:24:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-17 03:24:53,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:53,767 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:53,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:24:53,767 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash 278086017, now seen corresponding path program 1 times [2021-12-17 03:24:53,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091852971] [2021-12-17 03:24:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:53,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-17 03:24:53,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:53,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091852971] [2021-12-17 03:24:53,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091852971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:53,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:53,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:53,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297044575] [2021-12-17 03:24:53,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:53,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:53,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:53,923 INFO L87 Difference]: Start difference. First operand 3978 states and 5924 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-12-17 03:24:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:54,008 INFO L93 Difference]: Finished difference Result 8392 states and 12520 transitions. [2021-12-17 03:24:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:54,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 271 [2021-12-17 03:24:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:54,015 INFO L225 Difference]: With dead ends: 8392 [2021-12-17 03:24:54,016 INFO L226 Difference]: Without dead ends: 4437 [2021-12-17 03:24:54,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:54,020 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 158 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:54,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 590 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2021-12-17 03:24:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 4437. [2021-12-17 03:24:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4437 states, 4436 states have (on average 1.4887285843101894) internal successors, (6604), 4436 states have internal predecessors, (6604), 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) [2021-12-17 03:24:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4437 states to 4437 states and 6604 transitions. [2021-12-17 03:24:54,117 INFO L78 Accepts]: Start accepts. Automaton has 4437 states and 6604 transitions. Word has length 271 [2021-12-17 03:24:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:54,118 INFO L470 AbstractCegarLoop]: Abstraction has 4437 states and 6604 transitions. [2021-12-17 03:24:54,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-12-17 03:24:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 4437 states and 6604 transitions. [2021-12-17 03:24:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-12-17 03:24:54,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:54,126 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:54,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:24:54,127 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash 677122406, now seen corresponding path program 1 times [2021-12-17 03:24:54,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:54,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379015501] [2021-12-17 03:24:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:54,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-17 03:24:54,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379015501] [2021-12-17 03:24:54,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379015501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:54,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:54,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:54,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451009590] [2021-12-17 03:24:54,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:54,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:54,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:54,354 INFO L87 Difference]: Start difference. First operand 4437 states and 6604 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-17 03:24:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:54,472 INFO L93 Difference]: Finished difference Result 9343 states and 13929 transitions. [2021-12-17 03:24:54,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:54,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 345 [2021-12-17 03:24:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:54,481 INFO L225 Difference]: With dead ends: 9343 [2021-12-17 03:24:54,482 INFO L226 Difference]: Without dead ends: 4929 [2021-12-17 03:24:54,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:54,487 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:54,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 378 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:24:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2021-12-17 03:24:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 4929. [2021-12-17 03:24:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4928 states have (on average 1.4902597402597402) internal successors, (7344), 4928 states have internal predecessors, (7344), 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) [2021-12-17 03:24:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 7344 transitions. [2021-12-17 03:24:54,617 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 7344 transitions. Word has length 345 [2021-12-17 03:24:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:54,619 INFO L470 AbstractCegarLoop]: Abstraction has 4929 states and 7344 transitions. [2021-12-17 03:24:54,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-17 03:24:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 7344 transitions. [2021-12-17 03:24:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-17 03:24:54,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:54,626 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:54,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:24:54,627 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash -485820759, now seen corresponding path program 1 times [2021-12-17 03:24:54,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800531434] [2021-12-17 03:24:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:54,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 941 trivial. 0 not checked. [2021-12-17 03:24:54,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:54,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800531434] [2021-12-17 03:24:54,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800531434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:54,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:54,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:54,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932904540] [2021-12-17 03:24:54,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:54,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:54,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:54,802 INFO L87 Difference]: Start difference. First operand 4929 states and 7344 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-12-17 03:24:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:54,896 INFO L93 Difference]: Finished difference Result 10327 states and 15409 transitions. [2021-12-17 03:24:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 386 [2021-12-17 03:24:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:54,905 INFO L225 Difference]: With dead ends: 10327 [2021-12-17 03:24:54,905 INFO L226 Difference]: Without dead ends: 5421 [2021-12-17 03:24:54,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:54,910 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 377 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5421 states. [2021-12-17 03:24:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5421 to 5421. [2021-12-17 03:24:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5421 states, 5420 states have (on average 1.4916974169741697) internal successors, (8085), 5420 states have internal predecessors, (8085), 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) [2021-12-17 03:24:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 8085 transitions. [2021-12-17 03:24:55,018 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 8085 transitions. Word has length 386 [2021-12-17 03:24:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:55,019 INFO L470 AbstractCegarLoop]: Abstraction has 5421 states and 8085 transitions. [2021-12-17 03:24:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-12-17 03:24:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 8085 transitions. [2021-12-17 03:24:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-17 03:24:55,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:55,028 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:55,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:24:55,029 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -477358949, now seen corresponding path program 1 times [2021-12-17 03:24:55,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:55,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185785388] [2021-12-17 03:24:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:55,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-12-17 03:24:55,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185785388] [2021-12-17 03:24:55,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185785388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:55,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:55,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:55,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65176755] [2021-12-17 03:24:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:55,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:55,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:55,193 INFO L87 Difference]: Start difference. First operand 5421 states and 8085 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-12-17 03:24:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:55,311 INFO L93 Difference]: Finished difference Result 11305 states and 16882 transitions. [2021-12-17 03:24:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:55,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 394 [2021-12-17 03:24:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:55,321 INFO L225 Difference]: With dead ends: 11305 [2021-12-17 03:24:55,321 INFO L226 Difference]: Without dead ends: 5907 [2021-12-17 03:24:55,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:55,327 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:55,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-12-17 03:24:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 5907. [2021-12-17 03:24:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5907 states, 5906 states have (on average 1.4911953945140535) internal successors, (8807), 5906 states have internal predecessors, (8807), 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) [2021-12-17 03:24:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5907 states to 5907 states and 8807 transitions. [2021-12-17 03:24:55,433 INFO L78 Accepts]: Start accepts. Automaton has 5907 states and 8807 transitions. Word has length 394 [2021-12-17 03:24:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:55,433 INFO L470 AbstractCegarLoop]: Abstraction has 5907 states and 8807 transitions. [2021-12-17 03:24:55,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2021-12-17 03:24:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5907 states and 8807 transitions. [2021-12-17 03:24:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-17 03:24:55,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:55,442 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:55,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:24:55,442 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash 230966792, now seen corresponding path program 1 times [2021-12-17 03:24:55,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:55,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210146345] [2021-12-17 03:24:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:55,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2021-12-17 03:24:55,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210146345] [2021-12-17 03:24:55,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210146345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:55,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:55,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:55,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000096320] [2021-12-17 03:24:55,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:55,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:55,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:55,618 INFO L87 Difference]: Start difference. First operand 5907 states and 8807 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2021-12-17 03:24:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:55,807 INFO L93 Difference]: Finished difference Result 12283 states and 18335 transitions. [2021-12-17 03:24:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:55,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 469 [2021-12-17 03:24:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:55,818 INFO L225 Difference]: With dead ends: 12283 [2021-12-17 03:24:55,818 INFO L226 Difference]: Without dead ends: 6399 [2021-12-17 03:24:55,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:55,825 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:55,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 375 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:24:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6399 states. [2021-12-17 03:24:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6399 to 6399. [2021-12-17 03:24:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6399 states, 6398 states have (on average 1.4926539543607378) internal successors, (9550), 6398 states have internal predecessors, (9550), 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) [2021-12-17 03:24:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6399 states to 6399 states and 9550 transitions. [2021-12-17 03:24:55,947 INFO L78 Accepts]: Start accepts. Automaton has 6399 states and 9550 transitions. Word has length 469 [2021-12-17 03:24:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:55,947 INFO L470 AbstractCegarLoop]: Abstraction has 6399 states and 9550 transitions. [2021-12-17 03:24:55,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2021-12-17 03:24:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6399 states and 9550 transitions. [2021-12-17 03:24:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-17 03:24:55,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:55,959 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:55,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:24:55,959 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1148640387, now seen corresponding path program 1 times [2021-12-17 03:24:55,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484369822] [2021-12-17 03:24:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:55,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 702 proven. 0 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-12-17 03:24:56,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:56,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484369822] [2021-12-17 03:24:56,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484369822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:56,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:56,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:56,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075098283] [2021-12-17 03:24:56,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:56,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:56,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:56,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:56,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:56,149 INFO L87 Difference]: Start difference. First operand 6399 states and 9550 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-12-17 03:24:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:56,265 INFO L93 Difference]: Finished difference Result 13267 states and 19821 transitions. [2021-12-17 03:24:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 511 [2021-12-17 03:24:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:56,279 INFO L225 Difference]: With dead ends: 13267 [2021-12-17 03:24:56,279 INFO L226 Difference]: Without dead ends: 6891 [2021-12-17 03:24:56,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:56,286 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:56,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 374 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-12-17 03:24:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6891. [2021-12-17 03:24:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6891 states, 6890 states have (on average 1.4940493468795355) internal successors, (10294), 6890 states have internal predecessors, (10294), 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) [2021-12-17 03:24:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6891 states to 6891 states and 10294 transitions. [2021-12-17 03:24:56,397 INFO L78 Accepts]: Start accepts. Automaton has 6891 states and 10294 transitions. Word has length 511 [2021-12-17 03:24:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:56,398 INFO L470 AbstractCegarLoop]: Abstraction has 6891 states and 10294 transitions. [2021-12-17 03:24:56,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-12-17 03:24:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6891 states and 10294 transitions. [2021-12-17 03:24:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-17 03:24:56,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:56,410 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:56,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:24:56,411 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2030741037, now seen corresponding path program 1 times [2021-12-17 03:24:56,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469794081] [2021-12-17 03:24:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:56,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-12-17 03:24:56,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:56,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469794081] [2021-12-17 03:24:56,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469794081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:56,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:56,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:56,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051323178] [2021-12-17 03:24:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:56,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:56,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:56,680 INFO L87 Difference]: Start difference. First operand 6891 states and 10294 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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) [2021-12-17 03:24:58,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:59,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:59,022 INFO L93 Difference]: Finished difference Result 14935 states and 22241 transitions. [2021-12-17 03:24:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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 520 [2021-12-17 03:24:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:59,038 INFO L225 Difference]: With dead ends: 14935 [2021-12-17 03:24:59,038 INFO L226 Difference]: Without dead ends: 8067 [2021-12-17 03:24:59,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:59,044 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 65 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:59,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 691 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8067 states. [2021-12-17 03:24:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8067 to 7465. [2021-12-17 03:24:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7464 states have (on average 1.497320471596999) internal successors, (11176), 7464 states have internal predecessors, (11176), 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) [2021-12-17 03:24:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 11176 transitions. [2021-12-17 03:24:59,150 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 11176 transitions. Word has length 520 [2021-12-17 03:24:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:59,152 INFO L470 AbstractCegarLoop]: Abstraction has 7465 states and 11176 transitions. [2021-12-17 03:24:59,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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) [2021-12-17 03:24:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 11176 transitions. [2021-12-17 03:24:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-17 03:24:59,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:59,161 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:59,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 03:24:59,162 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1407400015, now seen corresponding path program 1 times [2021-12-17 03:24:59,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:59,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151799048] [2021-12-17 03:24:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:59,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2021-12-17 03:24:59,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:59,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151799048] [2021-12-17 03:24:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151799048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:59,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:59,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:59,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073353091] [2021-12-17 03:24:59,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:59,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:59,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:59,353 INFO L87 Difference]: Start difference. First operand 7465 states and 11176 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2021-12-17 03:24:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:59,485 INFO L93 Difference]: Finished difference Result 15435 states and 23129 transitions. [2021-12-17 03:24:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 520 [2021-12-17 03:24:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:59,496 INFO L225 Difference]: With dead ends: 15435 [2021-12-17 03:24:59,496 INFO L226 Difference]: Without dead ends: 7993 [2021-12-17 03:24:59,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:59,502 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:59,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:24:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7993 states. [2021-12-17 03:24:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7993 to 7993. [2021-12-17 03:24:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7993 states, 7992 states have (on average 1.4967467467467468) internal successors, (11962), 7992 states have internal predecessors, (11962), 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) [2021-12-17 03:24:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7993 states to 7993 states and 11962 transitions. [2021-12-17 03:24:59,654 INFO L78 Accepts]: Start accepts. Automaton has 7993 states and 11962 transitions. Word has length 520 [2021-12-17 03:24:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:59,654 INFO L470 AbstractCegarLoop]: Abstraction has 7993 states and 11962 transitions. [2021-12-17 03:24:59,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2021-12-17 03:24:59,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7993 states and 11962 transitions. [2021-12-17 03:24:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-12-17 03:24:59,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:59,664 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 8, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:24:59,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 03:24:59,664 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -413242633, now seen corresponding path program 1 times [2021-12-17 03:24:59,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:59,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825944489] [2021-12-17 03:24:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:59,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 842 proven. 0 refuted. 0 times theorem prover too weak. 2560 trivial. 0 not checked. [2021-12-17 03:24:59,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:59,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825944489] [2021-12-17 03:24:59,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825944489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:59,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:59,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:59,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225942172] [2021-12-17 03:24:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:59,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:59,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:59,958 INFO L87 Difference]: Start difference. First operand 7993 states and 11962 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 03:25:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:00,098 INFO L93 Difference]: Finished difference Result 16496 states and 24708 transitions. [2021-12-17 03:25:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:25:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 596 [2021-12-17 03:25:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:00,108 INFO L225 Difference]: With dead ends: 16496 [2021-12-17 03:25:00,109 INFO L226 Difference]: Without dead ends: 8526 [2021-12-17 03:25:00,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:25:00,115 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:00,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 372 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:25:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2021-12-17 03:25:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 8526. [2021-12-17 03:25:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 8525 states have (on average 1.4980645161290322) internal successors, (12771), 8525 states have internal predecessors, (12771), 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) [2021-12-17 03:25:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 12771 transitions. [2021-12-17 03:25:00,228 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 12771 transitions. Word has length 596 [2021-12-17 03:25:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:00,229 INFO L470 AbstractCegarLoop]: Abstraction has 8526 states and 12771 transitions. [2021-12-17 03:25:00,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 03:25:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 12771 transitions. [2021-12-17 03:25:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2021-12-17 03:25:00,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:00,241 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 9, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:00,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:25:00,242 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1360351377, now seen corresponding path program 1 times [2021-12-17 03:25:00,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:00,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840276147] [2021-12-17 03:25:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:00,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 906 proven. 0 refuted. 0 times theorem prover too weak. 3000 trivial. 0 not checked. [2021-12-17 03:25:00,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:00,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840276147] [2021-12-17 03:25:00,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840276147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:00,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:00,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:25:00,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631242098] [2021-12-17 03:25:00,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:00,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:25:00,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:25:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:25:00,530 INFO L87 Difference]: Start difference. First operand 8526 states and 12771 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:25:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:00,665 INFO L93 Difference]: Finished difference Result 9061 states and 13583 transitions. [2021-12-17 03:25:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:25:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 639 [2021-12-17 03:25:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:00,676 INFO L225 Difference]: With dead ends: 9061 [2021-12-17 03:25:00,676 INFO L226 Difference]: Without dead ends: 9059 [2021-12-17 03:25:00,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:25:00,679 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:00,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 371 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 03:25:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9059 states. [2021-12-17 03:25:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9059 to 9059. [2021-12-17 03:25:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9059 states, 9058 states have (on average 1.4993376021196732) internal successors, (13581), 9058 states have internal predecessors, (13581), 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) [2021-12-17 03:25:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9059 states to 9059 states and 13581 transitions. [2021-12-17 03:25:00,827 INFO L78 Accepts]: Start accepts. Automaton has 9059 states and 13581 transitions. Word has length 639 [2021-12-17 03:25:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:00,828 INFO L470 AbstractCegarLoop]: Abstraction has 9059 states and 13581 transitions. [2021-12-17 03:25:00,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:25:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9059 states and 13581 transitions. [2021-12-17 03:25:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2021-12-17 03:25:00,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:00,840 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:00,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 03:25:00,840 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1235463390, now seen corresponding path program 1 times [2021-12-17 03:25:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:00,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512193615] [2021-12-17 03:25:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:00,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2249 proven. 24 refuted. 0 times theorem prover too weak. 1673 trivial. 0 not checked. [2021-12-17 03:25:01,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512193615] [2021-12-17 03:25:01,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512193615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:25:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739248633] [2021-12-17 03:25:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:01,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:25:01,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:25:01,233 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) [2021-12-17 03:25:01,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:25:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 03:25:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:25:02,590 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:25:02,591 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:25:02,680 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-17 03:25:02,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-17 03:25:02,946 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 20 treesize of output 8 [2021-12-17 03:25:03,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:25:03,084 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 19 [2021-12-17 03:25:03,086 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 19 treesize of output 13 [2021-12-17 03:25:03,115 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-12-17 03:25:03,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 55 [2021-12-17 03:25:03,170 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-17 03:25:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-12-17 03:25:03,360 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:25:03,360 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 29 treesize of output 11 [2021-12-17 03:25:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2243 proven. 194 refuted. 0 times theorem prover too weak. 1509 trivial. 0 not checked. [2021-12-17 03:25:03,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:25:04,161 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 77 treesize of output 53 [2021-12-17 03:25:04,164 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 53 treesize of output 41 [2021-12-17 03:25:05,875 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 195 treesize of output 189 [2021-12-17 03:25:05,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 03:25:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2245 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2021-12-17 03:25:06,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739248633] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:25:06,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:25:06,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 13] total 18 [2021-12-17 03:25:06,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483244508] [2021-12-17 03:25:06,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:06,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:25:06,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:06,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:25:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:25:06,208 INFO L87 Difference]: Start difference. First operand 9059 states and 13581 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 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) [2021-12-17 03:25:07,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:09,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:14,822 INFO L93 Difference]: Finished difference Result 26161 states and 39162 transitions. [2021-12-17 03:25:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:25:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 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 649 [2021-12-17 03:25:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:14,859 INFO L225 Difference]: With dead ends: 26161 [2021-12-17 03:25:14,859 INFO L226 Difference]: Without dead ends: 17125 [2021-12-17 03:25:14,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1313 GetRequests, 1290 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:25:14,879 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 461 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:14,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 984 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 536 Invalid, 1 Unknown, 267 Unchecked, 4.2s Time] [2021-12-17 03:25:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-12-17 03:25:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 14587. [2021-12-17 03:25:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14587 states, 14586 states have (on average 1.5118606883312766) internal successors, (22052), 14586 states have internal predecessors, (22052), 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) [2021-12-17 03:25:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14587 states to 14587 states and 22052 transitions. [2021-12-17 03:25:15,107 INFO L78 Accepts]: Start accepts. Automaton has 14587 states and 22052 transitions. Word has length 649 [2021-12-17 03:25:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:15,108 INFO L470 AbstractCegarLoop]: Abstraction has 14587 states and 22052 transitions. [2021-12-17 03:25:15,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 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) [2021-12-17 03:25:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14587 states and 22052 transitions. [2021-12-17 03:25:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-12-17 03:25:15,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:15,125 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:15,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 03:25:15,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:25:15,350 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash 71254686, now seen corresponding path program 1 times [2021-12-17 03:25:15,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:15,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761067464] [2021-12-17 03:25:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:15,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3953 backedges. 2140 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-17 03:25:15,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761067464] [2021-12-17 03:25:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761067464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:15,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:15,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:25:15,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790512449] [2021-12-17 03:25:15,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:15,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:15,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:25:15,610 INFO L87 Difference]: Start difference. First operand 14587 states and 22052 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-12-17 03:25:17,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:17,860 INFO L93 Difference]: Finished difference Result 30330 states and 45654 transitions. [2021-12-17 03:25:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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 651 [2021-12-17 03:25:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:17,879 INFO L225 Difference]: With dead ends: 30330 [2021-12-17 03:25:17,879 INFO L226 Difference]: Without dead ends: 15698 [2021-12-17 03:25:17,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:17,892 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 64 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:17,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 689 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:25:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15698 states. [2021-12-17 03:25:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15698 to 14536. [2021-12-17 03:25:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14536 states, 14535 states have (on average 1.5114551083591332) internal successors, (21969), 14535 states have internal predecessors, (21969), 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) [2021-12-17 03:25:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14536 states to 14536 states and 21969 transitions. [2021-12-17 03:25:18,151 INFO L78 Accepts]: Start accepts. Automaton has 14536 states and 21969 transitions. Word has length 651 [2021-12-17 03:25:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:18,152 INFO L470 AbstractCegarLoop]: Abstraction has 14536 states and 21969 transitions. [2021-12-17 03:25:18,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-12-17 03:25:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 14536 states and 21969 transitions. [2021-12-17 03:25:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2021-12-17 03:25:18,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:18,176 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 18, 18, 18, 18, 18, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:18,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 03:25:18,176 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1910809676, now seen corresponding path program 1 times [2021-12-17 03:25:18,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:18,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850904196] [2021-12-17 03:25:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:18,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2232 proven. 0 refuted. 0 times theorem prover too weak. 2049 trivial. 0 not checked. [2021-12-17 03:25:18,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:18,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850904196] [2021-12-17 03:25:18,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850904196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:18,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:18,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:25:18,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913090302] [2021-12-17 03:25:18,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:18,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:18,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:18,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:18,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:25:18,604 INFO L87 Difference]: Start difference. First operand 14536 states and 21969 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 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) [2021-12-17 03:25:20,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:20,761 INFO L93 Difference]: Finished difference Result 30041 states and 45267 transitions. [2021-12-17 03:25:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:20,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 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 683 [2021-12-17 03:25:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:20,784 INFO L225 Difference]: With dead ends: 30041 [2021-12-17 03:25:20,785 INFO L226 Difference]: Without dead ends: 15528 [2021-12-17 03:25:20,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:20,797 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 79 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:20,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 675 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:25:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15528 states. [2021-12-17 03:25:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15528 to 14536. [2021-12-17 03:25:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14536 states, 14535 states have (on average 1.5092535259717923) internal successors, (21937), 14535 states have internal predecessors, (21937), 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) [2021-12-17 03:25:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14536 states to 14536 states and 21937 transitions. [2021-12-17 03:25:21,090 INFO L78 Accepts]: Start accepts. Automaton has 14536 states and 21937 transitions. Word has length 683 [2021-12-17 03:25:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:21,091 INFO L470 AbstractCegarLoop]: Abstraction has 14536 states and 21937 transitions. [2021-12-17 03:25:21,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 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) [2021-12-17 03:25:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14536 states and 21937 transitions. [2021-12-17 03:25:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2021-12-17 03:25:21,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:21,113 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:21,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 03:25:21,113 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -645334114, now seen corresponding path program 1 times [2021-12-17 03:25:21,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:21,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476730175] [2021-12-17 03:25:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:21,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 2484 proven. 0 refuted. 0 times theorem prover too weak. 2094 trivial. 0 not checked. [2021-12-17 03:25:21,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:21,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476730175] [2021-12-17 03:25:21,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476730175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:21,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:21,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:25:21,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375818517] [2021-12-17 03:25:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:21,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:21,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:25:21,425 INFO L87 Difference]: Start difference. First operand 14536 states and 21937 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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) [2021-12-17 03:25:23,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:23,868 INFO L93 Difference]: Finished difference Result 30041 states and 45203 transitions. [2021-12-17 03:25:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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 693 [2021-12-17 03:25:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:23,887 INFO L225 Difference]: With dead ends: 30041 [2021-12-17 03:25:23,888 INFO L226 Difference]: Without dead ends: 15528 [2021-12-17 03:25:23,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:23,900 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 70 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:23,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 673 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:25:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15528 states. [2021-12-17 03:25:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15528 to 14536. [2021-12-17 03:25:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14536 states, 14535 states have (on average 1.5070519435844514) internal successors, (21905), 14535 states have internal predecessors, (21905), 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) [2021-12-17 03:25:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14536 states to 14536 states and 21905 transitions. [2021-12-17 03:25:24,277 INFO L78 Accepts]: Start accepts. Automaton has 14536 states and 21905 transitions. Word has length 693 [2021-12-17 03:25:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:24,278 INFO L470 AbstractCegarLoop]: Abstraction has 14536 states and 21905 transitions. [2021-12-17 03:25:24,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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) [2021-12-17 03:25:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 14536 states and 21905 transitions. [2021-12-17 03:25:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2021-12-17 03:25:24,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:24,295 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:24,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-17 03:25:24,295 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash 392922944, now seen corresponding path program 1 times [2021-12-17 03:25:24,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398335422] [2021-12-17 03:25:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:24,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 2511 proven. 0 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2021-12-17 03:25:24,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:24,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398335422] [2021-12-17 03:25:24,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398335422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:24,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:24,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:25:24,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565033153] [2021-12-17 03:25:24,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:24,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:24,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:25:24,536 INFO L87 Difference]: Start difference. First operand 14536 states and 21905 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2021-12-17 03:25:26,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:27,004 INFO L93 Difference]: Finished difference Result 29913 states and 44959 transitions. [2021-12-17 03:25:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 695 [2021-12-17 03:25:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:27,023 INFO L225 Difference]: With dead ends: 29913 [2021-12-17 03:25:27,023 INFO L226 Difference]: Without dead ends: 15400 [2021-12-17 03:25:27,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:27,035 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 64 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:27,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 665 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:25:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15400 states. [2021-12-17 03:25:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15400 to 14536. [2021-12-17 03:25:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14536 states, 14535 states have (on average 1.5048503611971105) internal successors, (21873), 14535 states have internal predecessors, (21873), 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) [2021-12-17 03:25:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14536 states to 14536 states and 21873 transitions. [2021-12-17 03:25:27,257 INFO L78 Accepts]: Start accepts. Automaton has 14536 states and 21873 transitions. Word has length 695 [2021-12-17 03:25:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:27,257 INFO L470 AbstractCegarLoop]: Abstraction has 14536 states and 21873 transitions. [2021-12-17 03:25:27,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2021-12-17 03:25:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14536 states and 21873 transitions. [2021-12-17 03:25:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2021-12-17 03:25:27,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:27,275 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:27,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 03:25:27,275 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:27,275 INFO L85 PathProgramCache]: Analyzing trace with hash -304538648, now seen corresponding path program 1 times [2021-12-17 03:25:27,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68818685] [2021-12-17 03:25:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:27,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4755 backedges. 2590 proven. 34 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2021-12-17 03:25:27,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:27,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68818685] [2021-12-17 03:25:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68818685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:25:27,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999351774] [2021-12-17 03:25:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:27,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:25:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:25:27,632 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) [2021-12-17 03:25:27,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:25:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 03:25:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:25:29,581 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 19 [2021-12-17 03:25:29,605 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-12-17 03:25:29,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 40 treesize of output 55 [2021-12-17 03:25:29,612 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 10 treesize of output 9 [2021-12-17 03:25:29,618 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 10 treesize of output 9 [2021-12-17 03:25:29,755 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 9 treesize of output 3 [2021-12-17 03:25:29,858 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 19 treesize of output 7 [2021-12-17 03:25:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4755 backedges. 2574 proven. 0 refuted. 0 times theorem prover too weak. 2181 trivial. 0 not checked. [2021-12-17 03:25:30,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:25:30,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999351774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:30,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:25:30,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 03:25:30,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054335977] [2021-12-17 03:25:30,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:30,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:30,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:25:30,165 INFO L87 Difference]: Start difference. First operand 14536 states and 21873 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2021-12-17 03:25:32,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:32,722 INFO L93 Difference]: Finished difference Result 29967 states and 44997 transitions. [2021-12-17 03:25:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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 699 [2021-12-17 03:25:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:32,742 INFO L225 Difference]: With dead ends: 29967 [2021-12-17 03:25:32,742 INFO L226 Difference]: Without dead ends: 15454 [2021-12-17 03:25:32,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:25:32,763 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 66 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:32,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 693 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:25:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2021-12-17 03:25:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14723. [2021-12-17 03:25:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14723 states, 14722 states have (on average 1.5065208531449532) internal successors, (22179), 14722 states have internal predecessors, (22179), 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) [2021-12-17 03:25:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14723 states to 14723 states and 22179 transitions. [2021-12-17 03:25:33,007 INFO L78 Accepts]: Start accepts. Automaton has 14723 states and 22179 transitions. Word has length 699 [2021-12-17 03:25:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 14723 states and 22179 transitions. [2021-12-17 03:25:33,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2021-12-17 03:25:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14723 states and 22179 transitions. [2021-12-17 03:25:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2021-12-17 03:25:33,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:33,025 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:33,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:25:33,239 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,SelfDestructingSolverStorable56 [2021-12-17 03:25:33,240 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 728876478, now seen corresponding path program 1 times [2021-12-17 03:25:33,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655093553] [2021-12-17 03:25:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:33,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 2525 proven. 0 refuted. 0 times theorem prover too weak. 2237 trivial. 0 not checked. [2021-12-17 03:25:33,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655093553] [2021-12-17 03:25:33,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655093553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:33,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:33,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:25:33,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836601289] [2021-12-17 03:25:33,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:33,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:33,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:33,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:33,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:25:33,485 INFO L87 Difference]: Start difference. First operand 14723 states and 22179 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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) [2021-12-17 03:25:35,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:35,957 INFO L93 Difference]: Finished difference Result 29730 states and 44692 transitions. [2021-12-17 03:25:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 701 [2021-12-17 03:25:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:35,977 INFO L225 Difference]: With dead ends: 29730 [2021-12-17 03:25:35,978 INFO L226 Difference]: Without dead ends: 15030 [2021-12-17 03:25:35,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:35,992 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 44 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:35,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 650 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:25:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15030 states. [2021-12-17 03:25:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15030 to 14536. [2021-12-17 03:25:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14536 states, 14535 states have (on average 1.5036807705538355) internal successors, (21856), 14535 states have internal predecessors, (21856), 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) [2021-12-17 03:25:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14536 states to 14536 states and 21856 transitions. [2021-12-17 03:25:36,341 INFO L78 Accepts]: Start accepts. Automaton has 14536 states and 21856 transitions. Word has length 701 [2021-12-17 03:25:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:36,342 INFO L470 AbstractCegarLoop]: Abstraction has 14536 states and 21856 transitions. [2021-12-17 03:25:36,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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) [2021-12-17 03:25:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 14536 states and 21856 transitions. [2021-12-17 03:25:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2021-12-17 03:25:36,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:36,364 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:36,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-17 03:25:36,364 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash -36095266, now seen corresponding path program 1 times [2021-12-17 03:25:36,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:36,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948306797] [2021-12-17 03:25:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:36,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4832 backedges. 2627 proven. 28 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2021-12-17 03:25:36,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:36,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948306797] [2021-12-17 03:25:36,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948306797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:25:36,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823477340] [2021-12-17 03:25:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:36,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:25:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:25:36,624 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) [2021-12-17 03:25:36,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:25:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 3077 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 03:25:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:25:38,195 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:25:38,196 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:25:38,244 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:25:38,245 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 19 treesize of output 7 [2021-12-17 03:25:38,614 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 20 treesize of output 8 [2021-12-17 03:25:38,750 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 36 treesize of output 24 [2021-12-17 03:25:38,770 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-12-17 03:25:38,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 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 50 treesize of output 65 [2021-12-17 03:25:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:38,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 19 [2021-12-17 03:25:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:38,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2021-12-17 03:25:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:38,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-17 03:25:38,953 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 19 treesize of output 7 [2021-12-17 03:25:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4832 backedges. 2622 proven. 220 refuted. 0 times theorem prover too weak. 1990 trivial. 0 not checked. [2021-12-17 03:25:39,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:25:39,664 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 29 treesize of output 23 [2021-12-17 03:25:39,665 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 48 treesize of output 46 [2021-12-17 03:25:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4832 backedges. 2617 proven. 0 refuted. 0 times theorem prover too weak. 2215 trivial. 0 not checked. [2021-12-17 03:25:40,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823477340] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:25:40,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:25:40,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2021-12-17 03:25:40,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839161792] [2021-12-17 03:25:40,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:40,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:40,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:25:40,082 INFO L87 Difference]: Start difference. First operand 14536 states and 21856 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2021-12-17 03:25:42,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:42,589 INFO L93 Difference]: Finished difference Result 31315 states and 46770 transitions. [2021-12-17 03:25:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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 705 [2021-12-17 03:25:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:42,610 INFO L225 Difference]: With dead ends: 31315 [2021-12-17 03:25:42,611 INFO L226 Difference]: Without dead ends: 16802 [2021-12-17 03:25:42,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1405 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:25:42,623 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 127 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:42,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 556 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:25:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16802 states. [2021-12-17 03:25:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16802 to 14587. [2021-12-17 03:25:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14587 states, 14586 states have (on average 1.5007541478129713) internal successors, (21890), 14586 states have internal predecessors, (21890), 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) [2021-12-17 03:25:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14587 states to 14587 states and 21890 transitions. [2021-12-17 03:25:42,866 INFO L78 Accepts]: Start accepts. Automaton has 14587 states and 21890 transitions. Word has length 705 [2021-12-17 03:25:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:42,866 INFO L470 AbstractCegarLoop]: Abstraction has 14587 states and 21890 transitions. [2021-12-17 03:25:42,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2021-12-17 03:25:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 14587 states and 21890 transitions. [2021-12-17 03:25:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2021-12-17 03:25:42,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:42,884 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:42,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 03:25:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:25:43,096 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1110256266, now seen corresponding path program 1 times [2021-12-17 03:25:43,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426170876] [2021-12-17 03:25:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:43,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 2969 proven. 0 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2021-12-17 03:25:43,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:43,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426170876] [2021-12-17 03:25:43,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426170876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:43,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:43,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:25:43,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726172559] [2021-12-17 03:25:43,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:43,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:25:43,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:25:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:43,440 INFO L87 Difference]: Start difference. First operand 14587 states and 21890 transitions. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2021-12-17 03:25:45,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:47,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:48,164 INFO L93 Difference]: Finished difference Result 35973 states and 53915 transitions. [2021-12-17 03:25:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:25:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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 707 [2021-12-17 03:25:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:48,191 INFO L225 Difference]: With dead ends: 35973 [2021-12-17 03:25:48,191 INFO L226 Difference]: Without dead ends: 21409 [2021-12-17 03:25:48,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:25:48,205 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 125 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:48,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1027 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 481 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-12-17 03:25:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21409 states. [2021-12-17 03:25:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21409 to 15369. [2021-12-17 03:25:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15368 states have (on average 1.4964211348256116) internal successors, (22997), 15368 states have internal predecessors, (22997), 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) [2021-12-17 03:25:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 22997 transitions. [2021-12-17 03:25:48,497 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 22997 transitions. Word has length 707 [2021-12-17 03:25:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:48,497 INFO L470 AbstractCegarLoop]: Abstraction has 15369 states and 22997 transitions. [2021-12-17 03:25:48,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2021-12-17 03:25:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 22997 transitions. [2021-12-17 03:25:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2021-12-17 03:25:48,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:48,516 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:48,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 03:25:48,517 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 858557066, now seen corresponding path program 1 times [2021-12-17 03:25:48,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:48,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684454625] [2021-12-17 03:25:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:48,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4839 backedges. 2578 proven. 0 refuted. 0 times theorem prover too weak. 2261 trivial. 0 not checked. [2021-12-17 03:25:48,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684454625] [2021-12-17 03:25:48,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684454625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:25:48,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:25:48,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:25:48,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802882336] [2021-12-17 03:25:48,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:25:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:25:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:25:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:25:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:25:48,742 INFO L87 Difference]: Start difference. First operand 15369 states and 22997 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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) [2021-12-17 03:25:50,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:25:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:25:51,242 INFO L93 Difference]: Finished difference Result 32691 states and 48850 transitions. [2021-12-17 03:25:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:25:51,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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 707 [2021-12-17 03:25:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:25:51,263 INFO L225 Difference]: With dead ends: 32691 [2021-12-17 03:25:51,263 INFO L226 Difference]: Without dead ends: 17345 [2021-12-17 03:25:51,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:25:51,276 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 46 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:25:51,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 651 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:25:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17345 states. [2021-12-17 03:25:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17345 to 16425. [2021-12-17 03:25:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16425 states, 16424 states have (on average 1.496590355577204) internal successors, (24580), 16424 states have internal predecessors, (24580), 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) [2021-12-17 03:25:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16425 states to 16425 states and 24580 transitions. [2021-12-17 03:25:51,554 INFO L78 Accepts]: Start accepts. Automaton has 16425 states and 24580 transitions. Word has length 707 [2021-12-17 03:25:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:25:51,555 INFO L470 AbstractCegarLoop]: Abstraction has 16425 states and 24580 transitions. [2021-12-17 03:25:51,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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) [2021-12-17 03:25:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16425 states and 24580 transitions. [2021-12-17 03:25:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2021-12-17 03:25:51,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:25:51,670 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:25:51,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-17 03:25:51,671 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:25:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:25:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1335303222, now seen corresponding path program 1 times [2021-12-17 03:25:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:25:51,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241756472] [2021-12-17 03:25:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:51,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:25:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1523 proven. 2924 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-12-17 03:25:53,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:25:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241756472] [2021-12-17 03:25:53,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241756472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:25:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745557619] [2021-12-17 03:25:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:25:53,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:25:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:25:53,698 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) [2021-12-17 03:25:53,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:25:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:25:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 3031 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-17 03:25:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:25:55,332 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:25:55,332 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:25:55,484 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-17 03:25:55,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-12-17 03:25:55,810 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 20 treesize of output 8 [2021-12-17 03:25:56,119 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 6 treesize of output 5 [2021-12-17 03:25:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2021-12-17 03:25:56,203 INFO L354 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2021-12-17 03:25:56,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 60 [2021-12-17 03:25:56,213 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:25:56,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2021-12-17 03:25:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,709 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 64 treesize of output 57 [2021-12-17 03:25:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,726 INFO L354 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2021-12-17 03:25:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 59 treesize of output 49 [2021-12-17 03:25:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,729 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 58 treesize of output 51 [2021-12-17 03:25:56,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,779 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 58 treesize of output 51 [2021-12-17 03:25:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,790 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 58 treesize of output 51 [2021-12-17 03:25:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:56,833 INFO L354 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2021-12-17 03:25:56,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2021-12-17 03:25:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:57,513 INFO L354 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2021-12-17 03:25:57,513 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 160 treesize of output 155 [2021-12-17 03:25:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:57,550 INFO L354 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2021-12-17 03:25:57,551 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 137 treesize of output 132 [2021-12-17 03:25:57,604 INFO L354 Elim1Store]: treesize reduction 53, result has 48.5 percent of original size [2021-12-17 03:25:57,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 75 [2021-12-17 03:25:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:58,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 379 treesize of output 295 [2021-12-17 03:25:59,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:25:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 379 treesize of output 313 [2021-12-17 03:25:59,048 INFO L354 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2021-12-17 03:25:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 379 treesize of output 392 [2021-12-17 03:26:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,127 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 360 treesize of output 296 [2021-12-17 03:26:10,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,135 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 360 treesize of output 278 [2021-12-17 03:26:10,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,163 INFO L354 Elim1Store]: treesize reduction 105, result has 29.1 percent of original size [2021-12-17 03:26:10,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 369 treesize of output 354 [2021-12-17 03:26:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 148 [2021-12-17 03:26:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:26:10,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 88 [2021-12-17 03:26:10,579 INFO L354 Elim1Store]: treesize reduction 151, result has 29.4 percent of original size [2021-12-17 03:26:10,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 116 treesize of output 144 [2021-12-17 03:26:10,694 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-17 03:26:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-12-17 03:26:10,848 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:26:10,849 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 29 treesize of output 11 [2021-12-17 03:26:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1764 proven. 573 refuted. 0 times theorem prover too weak. 2522 trivial. 0 not checked. [2021-12-17 03:26:10,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:26:20,643 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 2797 treesize of output 2709 [2021-12-17 03:26:20,671 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:26:20,672 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 8487 treesize of output 8175 [2021-12-17 03:26:20,713 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 12415 treesize of output 12051 [2021-12-17 03:26:20,755 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:26:20,756 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 23953 treesize of output 23225 [2021-12-17 03:26:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1895 proven. 141 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2021-12-17 03:26:25,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745557619] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:26:25,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:26:25,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 14] total 50 [2021-12-17 03:26:25,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753672100] [2021-12-17 03:26:25,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:26:25,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 03:26:25,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:26:25,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 03:26:25,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2123, Unknown=2, NotChecked=0, Total=2450 [2021-12-17 03:26:25,640 INFO L87 Difference]: Start difference. First operand 16425 states and 24580 transitions. Second operand has 50 states, 50 states have (on average 16.7) internal successors, (835), 50 states have internal predecessors, (835), 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) [2021-12-17 03:26:27,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:29,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:31,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:33,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:35,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:37,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:39,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:41,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:26:43,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:28:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:28:47,429 INFO L93 Difference]: Finished difference Result 475853 states and 694765 transitions. [2021-12-17 03:28:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 799 states. [2021-12-17 03:28:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 16.7) internal successors, (835), 50 states have internal predecessors, (835), 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 707 [2021-12-17 03:28:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:28:48,615 INFO L225 Difference]: With dead ends: 475853 [2021-12-17 03:28:48,615 INFO L226 Difference]: Without dead ends: 459261 [2021-12-17 03:28:48,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2871 GetRequests, 2002 SyntacticMatches, 36 SemanticMatches, 833 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330117 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=59271, Invalid=637117, Unknown=2, NotChecked=0, Total=696390 [2021-12-17 03:28:48,830 INFO L933 BasicCegarLoop]: 1326 mSDtfsCounter, 17136 mSDsluCounter, 32157 mSDsCounter, 0 mSdLazyCounter, 30005 mSolverCounterSat, 3144 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17136 SdHoareTripleChecker+Valid, 33483 SdHoareTripleChecker+Invalid, 52465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3144 IncrementalHoareTripleChecker+Valid, 30005 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 19308 IncrementalHoareTripleChecker+Unchecked, 55.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:28:48,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17136 Valid, 33483 Invalid, 52465 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3144 Valid, 30005 Invalid, 8 Unknown, 19308 Unchecked, 55.4s Time] [2021-12-17 03:28:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459261 states. [2021-12-17 03:28:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459261 to 208259. [2021-12-17 03:28:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208259 states, 208258 states have (on average 1.4950590133392234) internal successors, (311358), 208258 states have internal predecessors, (311358), 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) [2021-12-17 03:28:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208259 states to 208259 states and 311358 transitions. [2021-12-17 03:28:56,953 INFO L78 Accepts]: Start accepts. Automaton has 208259 states and 311358 transitions. Word has length 707 [2021-12-17 03:28:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:28:56,953 INFO L470 AbstractCegarLoop]: Abstraction has 208259 states and 311358 transitions. [2021-12-17 03:28:56,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 16.7) internal successors, (835), 50 states have internal predecessors, (835), 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) [2021-12-17 03:28:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 208259 states and 311358 transitions. [2021-12-17 03:28:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-12-17 03:28:57,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:28:57,441 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:28:57,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:28:57,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:28:57,652 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:28:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:28:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash 285353374, now seen corresponding path program 1 times [2021-12-17 03:28:57,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:28:57,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865086780] [2021-12-17 03:28:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:28:57,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:28:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:28:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4780 backedges. 2642 proven. 0 refuted. 0 times theorem prover too weak. 2138 trivial. 0 not checked. [2021-12-17 03:28:57,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:28:57,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865086780] [2021-12-17 03:28:57,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865086780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:28:57,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:28:57,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:28:57,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287645416] [2021-12-17 03:28:57,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:28:57,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:28:57,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:28:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:28:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:28:57,914 INFO L87 Difference]: Start difference. First operand 208259 states and 311358 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 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) [2021-12-17 03:28:59,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []