./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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-simplified/s3_srvr_12.cil.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 8822f5291178e45ba1da62c4d4636880280d6cc4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:24:12,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:24:12,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:24:12,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:24:12,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:24:12,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:24:12,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:24:12,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:24:12,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:24:12,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:24:12,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:24:12,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:24:12,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:24:12,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:24:12,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:24:12,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:24:12,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:24:12,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:24:12,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:24:12,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:24:12,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:24:12,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:24:12,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:24:12,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:24:12,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:24:12,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:24:12,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:24:12,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:24:12,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:24:12,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:24:12,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:24:12,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:24:12,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:24:12,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:24:12,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:24:12,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:24:12,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:24:12,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:24:12,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:24:12,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:24:12,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:24:12,815 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:24:12,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:24:12,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:24:12,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:24:12,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:24:12,846 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:24:12,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:24:12,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:24:12,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:24:12,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:24:12,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:24:12,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:24:12,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:24:12,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:24:12,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:24:12,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:24:12,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:24:12,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:24:12,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:24:12,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:24:12,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:24:12,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:24:12,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:24:12,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:24:12,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:24:12,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:24:12,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:24:12,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:24:12,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:24:12,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:24:12,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 8822f5291178e45ba1da62c4d4636880280d6cc4 [2020-10-19 22:24:13,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:24:13,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:24:13,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:24:13,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:24:13,062 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:24:13,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2020-10-19 22:24:13,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097428935/81176f3546124a1b82889a762c801ad2/FLAG6ae86a494 [2020-10-19 22:24:13,734 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:24:13,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_12.cil.c [2020-10-19 22:24:13,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097428935/81176f3546124a1b82889a762c801ad2/FLAG6ae86a494 [2020-10-19 22:24:14,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097428935/81176f3546124a1b82889a762c801ad2 [2020-10-19 22:24:14,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:24:14,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:24:14,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:24:14,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:24:14,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:24:14,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626752ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14, skipping insertion in model container [2020-10-19 22:24:14,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:24:14,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:24:14,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:24:14,558 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:24:14,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:24:14,710 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:24:14,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14 WrapperNode [2020-10-19 22:24:14,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:24:14,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:24:14,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:24:14,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:24:14,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:24:14,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:24:14,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:24:14,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:24:14,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... [2020-10-19 22:24:14,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:24:14,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:24:14,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:24:14,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:24:14,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:24:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:24:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:24:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:24:14,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:24:15,072 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-19 22:24:15,708 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-10-19 22:24:15,708 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-10-19 22:24:15,730 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:24:15,731 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-19 22:24:15,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:15 BoogieIcfgContainer [2020-10-19 22:24:15,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:24:15,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:24:15,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:24:15,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:24:15,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:24:14" (1/3) ... [2020-10-19 22:24:15,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237b4735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:24:15, skipping insertion in model container [2020-10-19 22:24:15,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:24:14" (2/3) ... [2020-10-19 22:24:15,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237b4735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:24:15, skipping insertion in model container [2020-10-19 22:24:15,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:15" (3/3) ... [2020-10-19 22:24:15,746 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-10-19 22:24:15,759 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:24:15,767 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:24:15,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:24:15,819 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:24:15,819 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:24:15,819 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:24:15,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:24:15,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:24:15,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:24:15,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:24:15,820 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:24:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-10-19 22:24:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:24:15,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:15,862 INFO L422 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] [2020-10-19 22:24:15,863 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1659372905, now seen corresponding path program 1 times [2020-10-19 22:24:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:15,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115393702] [2020-10-19 22:24:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:16,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115393702] [2020-10-19 22:24:16,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:16,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:16,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693094969] [2020-10-19 22:24:16,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:16,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:16,144 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 3 states. [2020-10-19 22:24:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:16,475 INFO L93 Difference]: Finished difference Result 354 states and 614 transitions. [2020-10-19 22:24:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:16,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-19 22:24:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:16,510 INFO L225 Difference]: With dead ends: 354 [2020-10-19 22:24:16,510 INFO L226 Difference]: Without dead ends: 174 [2020-10-19 22:24:16,515 INFO L677 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 [2020-10-19 22:24:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-19 22:24:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-19 22:24:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-19 22:24:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 277 transitions. [2020-10-19 22:24:16,603 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 277 transitions. Word has length 28 [2020-10-19 22:24:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:16,604 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 277 transitions. [2020-10-19 22:24:16,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 277 transitions. [2020-10-19 22:24:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:24:16,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:16,608 INFO L422 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] [2020-10-19 22:24:16,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:24:16,609 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:16,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1067837001, now seen corresponding path program 1 times [2020-10-19 22:24:16,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:16,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668767424] [2020-10-19 22:24:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:16,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668767424] [2020-10-19 22:24:16,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:16,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071869092] [2020-10-19 22:24:16,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:16,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:16,701 INFO L87 Difference]: Start difference. First operand 172 states and 277 transitions. Second operand 3 states. [2020-10-19 22:24:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:16,895 INFO L93 Difference]: Finished difference Result 358 states and 575 transitions. [2020-10-19 22:24:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:16,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 22:24:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:16,899 INFO L225 Difference]: With dead ends: 358 [2020-10-19 22:24:16,899 INFO L226 Difference]: Without dead ends: 194 [2020-10-19 22:24:16,901 INFO L677 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 [2020-10-19 22:24:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-19 22:24:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-10-19 22:24:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-19 22:24:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 307 transitions. [2020-10-19 22:24:16,920 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 307 transitions. Word has length 29 [2020-10-19 22:24:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:16,921 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 307 transitions. [2020-10-19 22:24:16,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 307 transitions. [2020-10-19 22:24:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:24:16,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:16,923 INFO L422 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] [2020-10-19 22:24:16,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:24:16,924 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1369735938, now seen corresponding path program 1 times [2020-10-19 22:24:16,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:16,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147147376] [2020-10-19 22:24:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:17,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147147376] [2020-10-19 22:24:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:17,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141484186] [2020-10-19 22:24:17,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:17,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:17,036 INFO L87 Difference]: Start difference. First operand 194 states and 307 transitions. Second operand 3 states. [2020-10-19 22:24:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:17,203 INFO L93 Difference]: Finished difference Result 388 states and 616 transitions. [2020-10-19 22:24:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:17,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 22:24:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:17,206 INFO L225 Difference]: With dead ends: 388 [2020-10-19 22:24:17,206 INFO L226 Difference]: Without dead ends: 202 [2020-10-19 22:24:17,208 INFO L677 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 [2020-10-19 22:24:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-19 22:24:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-10-19 22:24:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-19 22:24:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 318 transitions. [2020-10-19 22:24:17,223 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 318 transitions. Word has length 29 [2020-10-19 22:24:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:17,223 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 318 transitions. [2020-10-19 22:24:17,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 318 transitions. [2020-10-19 22:24:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:24:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:17,225 INFO L422 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] [2020-10-19 22:24:17,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:24:17,226 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1614302654, now seen corresponding path program 1 times [2020-10-19 22:24:17,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:17,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173840885] [2020-10-19 22:24:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:17,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173840885] [2020-10-19 22:24:17,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:17,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929465931] [2020-10-19 22:24:17,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:17,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:17,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:17,334 INFO L87 Difference]: Start difference. First operand 200 states and 318 transitions. Second operand 3 states. [2020-10-19 22:24:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:17,524 INFO L93 Difference]: Finished difference Result 393 states and 626 transitions. [2020-10-19 22:24:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:17,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 22:24:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:17,531 INFO L225 Difference]: With dead ends: 393 [2020-10-19 22:24:17,531 INFO L226 Difference]: Without dead ends: 201 [2020-10-19 22:24:17,532 INFO L677 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 [2020-10-19 22:24:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-19 22:24:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-10-19 22:24:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-19 22:24:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 319 transitions. [2020-10-19 22:24:17,553 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 319 transitions. Word has length 29 [2020-10-19 22:24:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:17,553 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 319 transitions. [2020-10-19 22:24:17,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 319 transitions. [2020-10-19 22:24:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 22:24:17,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:17,557 INFO L422 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] [2020-10-19 22:24:17,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 22:24:17,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash -210698213, now seen corresponding path program 1 times [2020-10-19 22:24:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:17,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267112258] [2020-10-19 22:24:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:17,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267112258] [2020-10-19 22:24:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239945941] [2020-10-19 22:24:17,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:17,643 INFO L87 Difference]: Start difference. First operand 201 states and 319 transitions. Second operand 3 states. [2020-10-19 22:24:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:17,811 INFO L93 Difference]: Finished difference Result 404 states and 638 transitions. [2020-10-19 22:24:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:17,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-10-19 22:24:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:17,813 INFO L225 Difference]: With dead ends: 404 [2020-10-19 22:24:17,814 INFO L226 Difference]: Without dead ends: 211 [2020-10-19 22:24:17,814 INFO L677 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 [2020-10-19 22:24:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-19 22:24:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-10-19 22:24:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-19 22:24:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 317 transitions. [2020-10-19 22:24:17,824 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 317 transitions. Word has length 30 [2020-10-19 22:24:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:17,824 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 317 transitions. [2020-10-19 22:24:17,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 317 transitions. [2020-10-19 22:24:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 22:24:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:17,826 INFO L422 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] [2020-10-19 22:24:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 22:24:17,827 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash -852120702, now seen corresponding path program 1 times [2020-10-19 22:24:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:17,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038484664] [2020-10-19 22:24:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038484664] [2020-10-19 22:24:17,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:17,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035206274] [2020-10-19 22:24:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:17,865 INFO L87 Difference]: Start difference. First operand 201 states and 317 transitions. Second operand 3 states. [2020-10-19 22:24:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:18,024 INFO L93 Difference]: Finished difference Result 404 states and 634 transitions. [2020-10-19 22:24:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:18,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-19 22:24:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:18,026 INFO L225 Difference]: With dead ends: 404 [2020-10-19 22:24:18,027 INFO L226 Difference]: Without dead ends: 211 [2020-10-19 22:24:18,028 INFO L677 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 [2020-10-19 22:24:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-19 22:24:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-10-19 22:24:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-19 22:24:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 315 transitions. [2020-10-19 22:24:18,037 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 315 transitions. Word has length 31 [2020-10-19 22:24:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:18,037 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 315 transitions. [2020-10-19 22:24:18,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 315 transitions. [2020-10-19 22:24:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 22:24:18,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:18,039 INFO L422 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] [2020-10-19 22:24:18,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:24:18,039 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1795373184, now seen corresponding path program 1 times [2020-10-19 22:24:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:18,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300185745] [2020-10-19 22:24:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:18,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300185745] [2020-10-19 22:24:18,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:18,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200491629] [2020-10-19 22:24:18,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:18,078 INFO L87 Difference]: Start difference. First operand 201 states and 315 transitions. Second operand 3 states. [2020-10-19 22:24:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:18,236 INFO L93 Difference]: Finished difference Result 404 states and 630 transitions. [2020-10-19 22:24:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:18,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-19 22:24:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:18,238 INFO L225 Difference]: With dead ends: 404 [2020-10-19 22:24:18,238 INFO L226 Difference]: Without dead ends: 211 [2020-10-19 22:24:18,239 INFO L677 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 [2020-10-19 22:24:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-19 22:24:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-10-19 22:24:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-19 22:24:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 313 transitions. [2020-10-19 22:24:18,249 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 313 transitions. Word has length 32 [2020-10-19 22:24:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:18,250 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 313 transitions. [2020-10-19 22:24:18,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 313 transitions. [2020-10-19 22:24:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 22:24:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:18,252 INFO L422 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] [2020-10-19 22:24:18,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 22:24:18,252 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1439838815, now seen corresponding path program 1 times [2020-10-19 22:24:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:18,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845077268] [2020-10-19 22:24:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:18,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845077268] [2020-10-19 22:24:18,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:18,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:24:18,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159320855] [2020-10-19 22:24:18,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:24:18,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:24:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:24:18,349 INFO L87 Difference]: Start difference. First operand 201 states and 313 transitions. Second operand 4 states. [2020-10-19 22:24:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:18,666 INFO L93 Difference]: Finished difference Result 600 states and 930 transitions. [2020-10-19 22:24:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 22:24:18,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 22:24:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:18,671 INFO L225 Difference]: With dead ends: 600 [2020-10-19 22:24:18,672 INFO L226 Difference]: Without dead ends: 407 [2020-10-19 22:24:18,673 INFO L677 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 [2020-10-19 22:24:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-19 22:24:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 383. [2020-10-19 22:24:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-19 22:24:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 595 transitions. [2020-10-19 22:24:18,700 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 595 transitions. Word has length 32 [2020-10-19 22:24:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:18,700 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 595 transitions. [2020-10-19 22:24:18,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:24:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 595 transitions. [2020-10-19 22:24:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-19 22:24:18,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:18,704 INFO L422 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] [2020-10-19 22:24:18,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 22:24:18,704 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash -443745160, now seen corresponding path program 1 times [2020-10-19 22:24:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:18,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298477854] [2020-10-19 22:24:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:18,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298477854] [2020-10-19 22:24:18,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:18,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:18,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383903690] [2020-10-19 22:24:18,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:18,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:18,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:18,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:18,789 INFO L87 Difference]: Start difference. First operand 383 states and 595 transitions. Second operand 3 states. [2020-10-19 22:24:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:18,992 INFO L93 Difference]: Finished difference Result 842 states and 1324 transitions. [2020-10-19 22:24:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:18,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-10-19 22:24:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:18,996 INFO L225 Difference]: With dead ends: 842 [2020-10-19 22:24:18,997 INFO L226 Difference]: Without dead ends: 467 [2020-10-19 22:24:18,998 INFO L677 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 [2020-10-19 22:24:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-19 22:24:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 449. [2020-10-19 22:24:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2020-10-19 22:24:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 710 transitions. [2020-10-19 22:24:19,018 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 710 transitions. Word has length 44 [2020-10-19 22:24:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:19,019 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 710 transitions. [2020-10-19 22:24:19,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 710 transitions. [2020-10-19 22:24:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-19 22:24:19,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:19,021 INFO L422 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] [2020-10-19 22:24:19,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 22:24:19,021 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:19,022 INFO L82 PathProgramCache]: Analyzing trace with hash 974176282, now seen corresponding path program 1 times [2020-10-19 22:24:19,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:19,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081949404] [2020-10-19 22:24:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:19,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081949404] [2020-10-19 22:24:19,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:19,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028507217] [2020-10-19 22:24:19,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:19,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:19,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:19,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:19,070 INFO L87 Difference]: Start difference. First operand 449 states and 710 transitions. Second operand 3 states. [2020-10-19 22:24:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:19,266 INFO L93 Difference]: Finished difference Result 931 states and 1482 transitions. [2020-10-19 22:24:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:19,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-10-19 22:24:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:19,270 INFO L225 Difference]: With dead ends: 931 [2020-10-19 22:24:19,271 INFO L226 Difference]: Without dead ends: 490 [2020-10-19 22:24:19,272 INFO L677 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 [2020-10-19 22:24:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-19 22:24:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 472. [2020-10-19 22:24:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-10-19 22:24:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 753 transitions. [2020-10-19 22:24:19,294 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 753 transitions. Word has length 45 [2020-10-19 22:24:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:19,294 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 753 transitions. [2020-10-19 22:24:19,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 753 transitions. [2020-10-19 22:24:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-19 22:24:19,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:19,297 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-19 22:24:19,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 22:24:19,298 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1540899075, now seen corresponding path program 1 times [2020-10-19 22:24:19,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:19,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315959282] [2020-10-19 22:24:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 22:24:19,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315959282] [2020-10-19 22:24:19,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:19,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091182355] [2020-10-19 22:24:19,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:19,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:19,351 INFO L87 Difference]: Start difference. First operand 472 states and 753 transitions. Second operand 3 states. [2020-10-19 22:24:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:19,670 INFO L93 Difference]: Finished difference Result 988 states and 1578 transitions. [2020-10-19 22:24:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:19,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-10-19 22:24:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:19,674 INFO L225 Difference]: With dead ends: 988 [2020-10-19 22:24:19,674 INFO L226 Difference]: Without dead ends: 524 [2020-10-19 22:24:19,675 INFO L677 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 [2020-10-19 22:24:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-19 22:24:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 506. [2020-10-19 22:24:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-19 22:24:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 804 transitions. [2020-10-19 22:24:19,702 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 804 transitions. Word has length 56 [2020-10-19 22:24:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:19,703 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 804 transitions. [2020-10-19 22:24:19,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 804 transitions. [2020-10-19 22:24:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-19 22:24:19,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:19,705 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-19 22:24:19,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 22:24:19,706 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1188180310, now seen corresponding path program 1 times [2020-10-19 22:24:19,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:19,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416690822] [2020-10-19 22:24:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 22:24:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416690822] [2020-10-19 22:24:19,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:19,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33958631] [2020-10-19 22:24:19,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:19,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:19,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:19,768 INFO L87 Difference]: Start difference. First operand 506 states and 804 transitions. Second operand 3 states. [2020-10-19 22:24:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:19,936 INFO L93 Difference]: Finished difference Result 1022 states and 1626 transitions. [2020-10-19 22:24:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:19,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-10-19 22:24:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:19,940 INFO L225 Difference]: With dead ends: 1022 [2020-10-19 22:24:19,940 INFO L226 Difference]: Without dead ends: 524 [2020-10-19 22:24:19,942 INFO L677 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 [2020-10-19 22:24:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-19 22:24:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 506. [2020-10-19 22:24:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-19 22:24:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2020-10-19 22:24:19,964 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 57 [2020-10-19 22:24:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:19,964 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2020-10-19 22:24:19,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2020-10-19 22:24:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-19 22:24:19,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:19,966 INFO L422 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] [2020-10-19 22:24:19,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 22:24:19,967 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:19,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2067348000, now seen corresponding path program 1 times [2020-10-19 22:24:19,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:19,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413168910] [2020-10-19 22:24:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 22:24:20,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413168910] [2020-10-19 22:24:20,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:20,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018247169] [2020-10-19 22:24:20,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:20,038 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand 3 states. [2020-10-19 22:24:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:20,231 INFO L93 Difference]: Finished difference Result 1069 states and 1697 transitions. [2020-10-19 22:24:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:20,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-10-19 22:24:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:20,236 INFO L225 Difference]: With dead ends: 1069 [2020-10-19 22:24:20,236 INFO L226 Difference]: Without dead ends: 571 [2020-10-19 22:24:20,237 INFO L677 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 [2020-10-19 22:24:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-19 22:24:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2020-10-19 22:24:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-19 22:24:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 898 transitions. [2020-10-19 22:24:20,282 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 898 transitions. Word has length 57 [2020-10-19 22:24:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:20,287 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 898 transitions. [2020-10-19 22:24:20,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 898 transitions. [2020-10-19 22:24:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-19 22:24:20,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:20,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2020-10-19 22:24:20,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 22:24:20,290 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash -583256949, now seen corresponding path program 1 times [2020-10-19 22:24:20,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:20,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431698858] [2020-10-19 22:24:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:20,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431698858] [2020-10-19 22:24:20,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:20,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:20,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729183127] [2020-10-19 22:24:20,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:20,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:20,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:20,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:20,356 INFO L87 Difference]: Start difference. First operand 569 states and 898 transitions. Second operand 3 states. [2020-10-19 22:24:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:20,541 INFO L93 Difference]: Finished difference Result 1179 states and 1859 transitions. [2020-10-19 22:24:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:20,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-10-19 22:24:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:20,545 INFO L225 Difference]: With dead ends: 1179 [2020-10-19 22:24:20,545 INFO L226 Difference]: Without dead ends: 618 [2020-10-19 22:24:20,546 INFO L677 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 [2020-10-19 22:24:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-10-19 22:24:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2020-10-19 22:24:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-10-19 22:24:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 962 transitions. [2020-10-19 22:24:20,572 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 962 transitions. Word has length 79 [2020-10-19 22:24:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:20,572 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 962 transitions. [2020-10-19 22:24:20,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 962 transitions. [2020-10-19 22:24:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-19 22:24:20,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:20,574 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-19 22:24:20,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 22:24:20,575 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1357251849, now seen corresponding path program 1 times [2020-10-19 22:24:20,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:20,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629468483] [2020-10-19 22:24:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:24:20,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629468483] [2020-10-19 22:24:20,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:20,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:20,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209537595] [2020-10-19 22:24:20,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:20,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:20,618 INFO L87 Difference]: Start difference. First operand 612 states and 962 transitions. Second operand 3 states. [2020-10-19 22:24:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:20,814 INFO L93 Difference]: Finished difference Result 1222 states and 1920 transitions. [2020-10-19 22:24:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:20,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-10-19 22:24:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:20,818 INFO L225 Difference]: With dead ends: 1222 [2020-10-19 22:24:20,819 INFO L226 Difference]: Without dead ends: 618 [2020-10-19 22:24:20,820 INFO L677 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 [2020-10-19 22:24:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-10-19 22:24:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2020-10-19 22:24:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-10-19 22:24:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 959 transitions. [2020-10-19 22:24:20,849 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 959 transitions. Word has length 80 [2020-10-19 22:24:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:20,849 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 959 transitions. [2020-10-19 22:24:20,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 959 transitions. [2020-10-19 22:24:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-19 22:24:20,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:20,852 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:20,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 22:24:20,852 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:20,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2054627548, now seen corresponding path program 1 times [2020-10-19 22:24:20,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:20,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902369890] [2020-10-19 22:24:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 22:24:20,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902369890] [2020-10-19 22:24:20,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:20,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406790552] [2020-10-19 22:24:20,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:20,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:20,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:20,899 INFO L87 Difference]: Start difference. First operand 612 states and 959 transitions. Second operand 3 states. [2020-10-19 22:24:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:21,073 INFO L93 Difference]: Finished difference Result 1218 states and 1908 transitions. [2020-10-19 22:24:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:21,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-10-19 22:24:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:21,077 INFO L225 Difference]: With dead ends: 1218 [2020-10-19 22:24:21,077 INFO L226 Difference]: Without dead ends: 614 [2020-10-19 22:24:21,079 INFO L677 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 [2020-10-19 22:24:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-10-19 22:24:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 612. [2020-10-19 22:24:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-10-19 22:24:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 954 transitions. [2020-10-19 22:24:21,104 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 954 transitions. Word has length 85 [2020-10-19 22:24:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 954 transitions. [2020-10-19 22:24:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 954 transitions. [2020-10-19 22:24:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-19 22:24:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:21,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-19 22:24:21,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 22:24:21,107 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:21,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1047765588, now seen corresponding path program 1 times [2020-10-19 22:24:21,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:21,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410864030] [2020-10-19 22:24:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-19 22:24:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410864030] [2020-10-19 22:24:21,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:21,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199635284] [2020-10-19 22:24:21,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:21,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:21,150 INFO L87 Difference]: Start difference. First operand 612 states and 954 transitions. Second operand 3 states. [2020-10-19 22:24:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:21,309 INFO L93 Difference]: Finished difference Result 1276 states and 1991 transitions. [2020-10-19 22:24:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:21,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-10-19 22:24:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:21,313 INFO L225 Difference]: With dead ends: 1276 [2020-10-19 22:24:21,313 INFO L226 Difference]: Without dead ends: 672 [2020-10-19 22:24:21,315 INFO L677 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 [2020-10-19 22:24:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-10-19 22:24:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2020-10-19 22:24:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-19 22:24:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 997 transitions. [2020-10-19 22:24:21,353 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 997 transitions. Word has length 93 [2020-10-19 22:24:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:21,354 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 997 transitions. [2020-10-19 22:24:21,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 997 transitions. [2020-10-19 22:24:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-19 22:24:21,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:21,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-19 22:24:21,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 22:24:21,358 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1111400187, now seen corresponding path program 1 times [2020-10-19 22:24:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:21,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196373225] [2020-10-19 22:24:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-19 22:24:21,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196373225] [2020-10-19 22:24:21,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:21,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:21,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746075353] [2020-10-19 22:24:21,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:21,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:21,413 INFO L87 Difference]: Start difference. First operand 644 states and 997 transitions. Second operand 3 states. [2020-10-19 22:24:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:21,628 INFO L93 Difference]: Finished difference Result 1308 states and 2028 transitions. [2020-10-19 22:24:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:21,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-10-19 22:24:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:21,633 INFO L225 Difference]: With dead ends: 1308 [2020-10-19 22:24:21,634 INFO L226 Difference]: Without dead ends: 672 [2020-10-19 22:24:21,635 INFO L677 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 [2020-10-19 22:24:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-10-19 22:24:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 644. [2020-10-19 22:24:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-19 22:24:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 991 transitions. [2020-10-19 22:24:21,683 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 991 transitions. Word has length 94 [2020-10-19 22:24:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:21,684 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 991 transitions. [2020-10-19 22:24:21,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 991 transitions. [2020-10-19 22:24:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-19 22:24:21,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:21,687 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:21,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 22:24:21,687 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash -51700436, now seen corresponding path program 1 times [2020-10-19 22:24:21,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:21,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123041168] [2020-10-19 22:24:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 22:24:21,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123041168] [2020-10-19 22:24:21,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:21,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760558053] [2020-10-19 22:24:21,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:21,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:21,739 INFO L87 Difference]: Start difference. First operand 644 states and 991 transitions. Second operand 3 states. [2020-10-19 22:24:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:21,955 INFO L93 Difference]: Finished difference Result 1344 states and 2068 transitions. [2020-10-19 22:24:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:21,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-10-19 22:24:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:21,959 INFO L225 Difference]: With dead ends: 1344 [2020-10-19 22:24:21,960 INFO L226 Difference]: Without dead ends: 708 [2020-10-19 22:24:21,961 INFO L677 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 [2020-10-19 22:24:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2020-10-19 22:24:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 696. [2020-10-19 22:24:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-10-19 22:24:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1067 transitions. [2020-10-19 22:24:21,996 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1067 transitions. Word has length 100 [2020-10-19 22:24:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:21,997 INFO L481 AbstractCegarLoop]: Abstraction has 696 states and 1067 transitions. [2020-10-19 22:24:21,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1067 transitions. [2020-10-19 22:24:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-19 22:24:22,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:22,000 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:22,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 22:24:22,001 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash -530812530, now seen corresponding path program 1 times [2020-10-19 22:24:22,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:22,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165256888] [2020-10-19 22:24:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 22:24:22,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165256888] [2020-10-19 22:24:22,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:22,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:22,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592361705] [2020-10-19 22:24:22,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:22,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:22,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:22,070 INFO L87 Difference]: Start difference. First operand 696 states and 1067 transitions. Second operand 3 states. [2020-10-19 22:24:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:22,339 INFO L93 Difference]: Finished difference Result 1401 states and 2150 transitions. [2020-10-19 22:24:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:22,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-10-19 22:24:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:22,344 INFO L225 Difference]: With dead ends: 1401 [2020-10-19 22:24:22,344 INFO L226 Difference]: Without dead ends: 709 [2020-10-19 22:24:22,346 INFO L677 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 [2020-10-19 22:24:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-19 22:24:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 697. [2020-10-19 22:24:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-19 22:24:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1068 transitions. [2020-10-19 22:24:22,380 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1068 transitions. Word has length 101 [2020-10-19 22:24:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:22,380 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1068 transitions. [2020-10-19 22:24:22,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1068 transitions. [2020-10-19 22:24:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-19 22:24:22,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:22,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:22,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 22:24:22,383 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:22,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1306174224, now seen corresponding path program 1 times [2020-10-19 22:24:22,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:22,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209137875] [2020-10-19 22:24:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-19 22:24:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209137875] [2020-10-19 22:24:22,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:22,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607662081] [2020-10-19 22:24:22,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:22,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:22,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:22,430 INFO L87 Difference]: Start difference. First operand 697 states and 1068 transitions. Second operand 3 states. [2020-10-19 22:24:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:22,623 INFO L93 Difference]: Finished difference Result 1433 states and 2192 transitions. [2020-10-19 22:24:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:22,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-10-19 22:24:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:22,629 INFO L225 Difference]: With dead ends: 1433 [2020-10-19 22:24:22,629 INFO L226 Difference]: Without dead ends: 744 [2020-10-19 22:24:22,632 INFO L677 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 [2020-10-19 22:24:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-19 22:24:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2020-10-19 22:24:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-19 22:24:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1123 transitions. [2020-10-19 22:24:22,663 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1123 transitions. Word has length 112 [2020-10-19 22:24:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:22,664 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1123 transitions. [2020-10-19 22:24:22,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1123 transitions. [2020-10-19 22:24:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-19 22:24:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:22,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:24:22,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 22:24:22,667 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -142977294, now seen corresponding path program 1 times [2020-10-19 22:24:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:22,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451889468] [2020-10-19 22:24:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-19 22:24:22,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451889468] [2020-10-19 22:24:22,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:22,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:22,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460027227] [2020-10-19 22:24:22,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:22,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:22,733 INFO L87 Difference]: Start difference. First operand 738 states and 1123 transitions. Second operand 3 states. [2020-10-19 22:24:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:22,926 INFO L93 Difference]: Finished difference Result 1474 states and 2242 transitions. [2020-10-19 22:24:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:22,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-10-19 22:24:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:22,932 INFO L225 Difference]: With dead ends: 1474 [2020-10-19 22:24:22,933 INFO L226 Difference]: Without dead ends: 744 [2020-10-19 22:24:22,934 INFO L677 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 [2020-10-19 22:24:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-19 22:24:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2020-10-19 22:24:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-19 22:24:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1118 transitions. [2020-10-19 22:24:22,964 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1118 transitions. Word has length 113 [2020-10-19 22:24:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:22,965 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1118 transitions. [2020-10-19 22:24:22,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1118 transitions. [2020-10-19 22:24:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-19 22:24:22,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:22,967 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-19 22:24:22,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 22:24:22,967 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1809562376, now seen corresponding path program 1 times [2020-10-19 22:24:22,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:22,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549943618] [2020-10-19 22:24:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-19 22:24:23,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549943618] [2020-10-19 22:24:23,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:23,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:23,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615430979] [2020-10-19 22:24:23,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:23,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:23,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:23,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:23,027 INFO L87 Difference]: Start difference. First operand 738 states and 1118 transitions. Second operand 3 states. [2020-10-19 22:24:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:23,188 INFO L93 Difference]: Finished difference Result 1510 states and 2285 transitions. [2020-10-19 22:24:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:23,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-10-19 22:24:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:23,193 INFO L225 Difference]: With dead ends: 1510 [2020-10-19 22:24:23,193 INFO L226 Difference]: Without dead ends: 780 [2020-10-19 22:24:23,195 INFO L677 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 [2020-10-19 22:24:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-19 22:24:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2020-10-19 22:24:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-19 22:24:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1156 transitions. [2020-10-19 22:24:23,225 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1156 transitions. Word has length 115 [2020-10-19 22:24:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:23,226 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1156 transitions. [2020-10-19 22:24:23,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1156 transitions. [2020-10-19 22:24:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-19 22:24:23,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:23,228 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-19 22:24:23,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 22:24:23,230 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:23,231 INFO L82 PathProgramCache]: Analyzing trace with hash 172042817, now seen corresponding path program 1 times [2020-10-19 22:24:23,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:23,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737634813] [2020-10-19 22:24:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-19 22:24:23,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737634813] [2020-10-19 22:24:23,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:23,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:23,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378391309] [2020-10-19 22:24:23,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:23,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:23,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:23,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:23,288 INFO L87 Difference]: Start difference. First operand 770 states and 1156 transitions. Second operand 3 states. [2020-10-19 22:24:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:23,454 INFO L93 Difference]: Finished difference Result 1542 states and 2314 transitions. [2020-10-19 22:24:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:23,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-10-19 22:24:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:23,462 INFO L225 Difference]: With dead ends: 1542 [2020-10-19 22:24:23,462 INFO L226 Difference]: Without dead ends: 780 [2020-10-19 22:24:23,464 INFO L677 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 [2020-10-19 22:24:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-19 22:24:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 770. [2020-10-19 22:24:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-19 22:24:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1147 transitions. [2020-10-19 22:24:23,513 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1147 transitions. Word has length 116 [2020-10-19 22:24:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:23,513 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 1147 transitions. [2020-10-19 22:24:23,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1147 transitions. [2020-10-19 22:24:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-19 22:24:23,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:23,518 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:23,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-19 22:24:23,519 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1961382768, now seen corresponding path program 1 times [2020-10-19 22:24:23,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:23,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787249951] [2020-10-19 22:24:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-19 22:24:23,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787249951] [2020-10-19 22:24:23,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:23,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:23,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213902220] [2020-10-19 22:24:23,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:23,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:23,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:23,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:23,615 INFO L87 Difference]: Start difference. First operand 770 states and 1147 transitions. Second operand 3 states. [2020-10-19 22:24:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:23,828 INFO L93 Difference]: Finished difference Result 1568 states and 2335 transitions. [2020-10-19 22:24:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:23,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-10-19 22:24:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:23,835 INFO L225 Difference]: With dead ends: 1568 [2020-10-19 22:24:23,835 INFO L226 Difference]: Without dead ends: 806 [2020-10-19 22:24:23,838 INFO L677 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 [2020-10-19 22:24:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-10-19 22:24:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 798. [2020-10-19 22:24:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-10-19 22:24:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1178 transitions. [2020-10-19 22:24:23,887 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1178 transitions. Word has length 137 [2020-10-19 22:24:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:23,887 INFO L481 AbstractCegarLoop]: Abstraction has 798 states and 1178 transitions. [2020-10-19 22:24:23,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1178 transitions. [2020-10-19 22:24:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-19 22:24:23,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:23,893 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:23,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-19 22:24:23,893 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:23,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1483046825, now seen corresponding path program 1 times [2020-10-19 22:24:23,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:23,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872308574] [2020-10-19 22:24:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-19 22:24:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872308574] [2020-10-19 22:24:23,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:23,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:23,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013082787] [2020-10-19 22:24:23,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:23,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:23,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:23,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:23,992 INFO L87 Difference]: Start difference. First operand 798 states and 1178 transitions. Second operand 3 states. [2020-10-19 22:24:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:24,220 INFO L93 Difference]: Finished difference Result 1596 states and 2356 transitions. [2020-10-19 22:24:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:24,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-10-19 22:24:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:24,226 INFO L225 Difference]: With dead ends: 1596 [2020-10-19 22:24:24,226 INFO L226 Difference]: Without dead ends: 806 [2020-10-19 22:24:24,229 INFO L677 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 [2020-10-19 22:24:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-10-19 22:24:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 798. [2020-10-19 22:24:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2020-10-19 22:24:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1168 transitions. [2020-10-19 22:24:24,289 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1168 transitions. Word has length 138 [2020-10-19 22:24:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:24,290 INFO L481 AbstractCegarLoop]: Abstraction has 798 states and 1168 transitions. [2020-10-19 22:24:24,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1168 transitions. [2020-10-19 22:24:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-19 22:24:24,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:24,293 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 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] [2020-10-19 22:24:24,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-19 22:24:24,294 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:24,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1313212300, now seen corresponding path program 1 times [2020-10-19 22:24:24,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:24,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291850194] [2020-10-19 22:24:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-19 22:24:24,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291850194] [2020-10-19 22:24:24,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:24,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:24,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158241567] [2020-10-19 22:24:24,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:24,343 INFO L87 Difference]: Start difference. First operand 798 states and 1168 transitions. Second operand 3 states. [2020-10-19 22:24:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:24,540 INFO L93 Difference]: Finished difference Result 1651 states and 2410 transitions. [2020-10-19 22:24:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:24,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-10-19 22:24:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:24,546 INFO L225 Difference]: With dead ends: 1651 [2020-10-19 22:24:24,546 INFO L226 Difference]: Without dead ends: 861 [2020-10-19 22:24:24,548 INFO L677 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 [2020-10-19 22:24:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-10-19 22:24:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 847. [2020-10-19 22:24:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2020-10-19 22:24:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1229 transitions. [2020-10-19 22:24:24,588 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1229 transitions. Word has length 141 [2020-10-19 22:24:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:24,589 INFO L481 AbstractCegarLoop]: Abstraction has 847 states and 1229 transitions. [2020-10-19 22:24:24,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1229 transitions. [2020-10-19 22:24:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-19 22:24:24,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:24,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 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] [2020-10-19 22:24:24,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-19 22:24:24,593 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash 75909554, now seen corresponding path program 1 times [2020-10-19 22:24:24,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:24,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522464623] [2020-10-19 22:24:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-19 22:24:24,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522464623] [2020-10-19 22:24:24,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:24,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:24,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770140723] [2020-10-19 22:24:24,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:24,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:24,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:24,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:24,653 INFO L87 Difference]: Start difference. First operand 847 states and 1229 transitions. Second operand 3 states. [2020-10-19 22:24:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:24,896 INFO L93 Difference]: Finished difference Result 1700 states and 2468 transitions. [2020-10-19 22:24:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:24,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-10-19 22:24:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:24,901 INFO L225 Difference]: With dead ends: 1700 [2020-10-19 22:24:24,901 INFO L226 Difference]: Without dead ends: 845 [2020-10-19 22:24:24,903 INFO L677 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 [2020-10-19 22:24:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2020-10-19 22:24:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 831. [2020-10-19 22:24:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-10-19 22:24:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1206 transitions. [2020-10-19 22:24:24,947 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1206 transitions. Word has length 142 [2020-10-19 22:24:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:24,947 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1206 transitions. [2020-10-19 22:24:24,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1206 transitions. [2020-10-19 22:24:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-19 22:24:24,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:24,950 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-19 22:24:24,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-19 22:24:24,950 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:24,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2072592764, now seen corresponding path program 1 times [2020-10-19 22:24:24,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:24,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674759135] [2020-10-19 22:24:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-19 22:24:25,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674759135] [2020-10-19 22:24:25,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:25,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:25,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513469674] [2020-10-19 22:24:25,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:25,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:25,034 INFO L87 Difference]: Start difference. First operand 831 states and 1206 transitions. Second operand 3 states. [2020-10-19 22:24:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:25,231 INFO L93 Difference]: Finished difference Result 1666 states and 2418 transitions. [2020-10-19 22:24:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:25,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-10-19 22:24:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:25,236 INFO L225 Difference]: With dead ends: 1666 [2020-10-19 22:24:25,236 INFO L226 Difference]: Without dead ends: 843 [2020-10-19 22:24:25,239 INFO L677 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 [2020-10-19 22:24:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-10-19 22:24:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 831. [2020-10-19 22:24:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2020-10-19 22:24:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1199 transitions. [2020-10-19 22:24:25,273 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1199 transitions. Word has length 146 [2020-10-19 22:24:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:25,273 INFO L481 AbstractCegarLoop]: Abstraction has 831 states and 1199 transitions. [2020-10-19 22:24:25,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1199 transitions. [2020-10-19 22:24:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-19 22:24:25,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:25,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-19 22:24:25,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-19 22:24:25,277 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:25,278 INFO L82 PathProgramCache]: Analyzing trace with hash 369501830, now seen corresponding path program 1 times [2020-10-19 22:24:25,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:25,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112103211] [2020-10-19 22:24:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-19 22:24:25,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112103211] [2020-10-19 22:24:25,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:25,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:25,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575917798] [2020-10-19 22:24:25,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:25,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:25,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:25,340 INFO L87 Difference]: Start difference. First operand 831 states and 1199 transitions. Second operand 3 states. [2020-10-19 22:24:25,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:25,529 INFO L93 Difference]: Finished difference Result 1666 states and 2404 transitions. [2020-10-19 22:24:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:25,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-10-19 22:24:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:25,534 INFO L225 Difference]: With dead ends: 1666 [2020-10-19 22:24:25,535 INFO L226 Difference]: Without dead ends: 826 [2020-10-19 22:24:25,538 INFO L677 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 [2020-10-19 22:24:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-10-19 22:24:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 814. [2020-10-19 22:24:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-10-19 22:24:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1170 transitions. [2020-10-19 22:24:25,574 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1170 transitions. Word has length 147 [2020-10-19 22:24:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:25,575 INFO L481 AbstractCegarLoop]: Abstraction has 814 states and 1170 transitions. [2020-10-19 22:24:25,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1170 transitions. [2020-10-19 22:24:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-19 22:24:25,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:25,578 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:25,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-19 22:24:25,578 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1770310156, now seen corresponding path program 1 times [2020-10-19 22:24:25,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:25,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380933190] [2020-10-19 22:24:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-19 22:24:25,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380933190] [2020-10-19 22:24:25,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:25,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:25,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904378045] [2020-10-19 22:24:25,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:25,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:25,640 INFO L87 Difference]: Start difference. First operand 814 states and 1170 transitions. Second operand 3 states. [2020-10-19 22:24:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:25,695 INFO L93 Difference]: Finished difference Result 2412 states and 3460 transitions. [2020-10-19 22:24:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:25,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-10-19 22:24:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:25,704 INFO L225 Difference]: With dead ends: 2412 [2020-10-19 22:24:25,704 INFO L226 Difference]: Without dead ends: 1606 [2020-10-19 22:24:25,706 INFO L677 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 [2020-10-19 22:24:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2020-10-19 22:24:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 816. [2020-10-19 22:24:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-19 22:24:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1172 transitions. [2020-10-19 22:24:25,763 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1172 transitions. Word has length 154 [2020-10-19 22:24:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:25,763 INFO L481 AbstractCegarLoop]: Abstraction has 816 states and 1172 transitions. [2020-10-19 22:24:25,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1172 transitions. [2020-10-19 22:24:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-19 22:24:25,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:25,766 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:25,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-19 22:24:25,766 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1570716982, now seen corresponding path program 1 times [2020-10-19 22:24:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:25,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244460739] [2020-10-19 22:24:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-19 22:24:25,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244460739] [2020-10-19 22:24:25,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:25,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:25,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13735348] [2020-10-19 22:24:25,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:25,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:25,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:25,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:25,862 INFO L87 Difference]: Start difference. First operand 816 states and 1172 transitions. Second operand 3 states. [2020-10-19 22:24:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:25,972 INFO L93 Difference]: Finished difference Result 2411 states and 3456 transitions. [2020-10-19 22:24:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:25,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-10-19 22:24:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:25,983 INFO L225 Difference]: With dead ends: 2411 [2020-10-19 22:24:25,983 INFO L226 Difference]: Without dead ends: 1603 [2020-10-19 22:24:25,987 INFO L677 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 [2020-10-19 22:24:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-10-19 22:24:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1601. [2020-10-19 22:24:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-10-19 22:24:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2292 transitions. [2020-10-19 22:24:26,121 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2292 transitions. Word has length 154 [2020-10-19 22:24:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:26,121 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2292 transitions. [2020-10-19 22:24:26,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2292 transitions. [2020-10-19 22:24:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-19 22:24:26,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:26,126 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:26,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-19 22:24:26,126 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash -362729202, now seen corresponding path program 1 times [2020-10-19 22:24:26,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:26,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223861101] [2020-10-19 22:24:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-19 22:24:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223861101] [2020-10-19 22:24:26,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:26,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:26,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118079625] [2020-10-19 22:24:26,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:26,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:26,341 INFO L87 Difference]: Start difference. First operand 1601 states and 2292 transitions. Second operand 3 states. [2020-10-19 22:24:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:26,641 INFO L93 Difference]: Finished difference Result 4747 states and 6780 transitions. [2020-10-19 22:24:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:26,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-10-19 22:24:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:26,659 INFO L225 Difference]: With dead ends: 4747 [2020-10-19 22:24:26,659 INFO L226 Difference]: Without dead ends: 3154 [2020-10-19 22:24:26,665 INFO L677 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 [2020-10-19 22:24:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-10-19 22:24:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1601. [2020-10-19 22:24:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-10-19 22:24:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2288 transitions. [2020-10-19 22:24:26,832 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2288 transitions. Word has length 156 [2020-10-19 22:24:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:26,833 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2288 transitions. [2020-10-19 22:24:26,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2288 transitions. [2020-10-19 22:24:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-19 22:24:26,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:26,838 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:26,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-19 22:24:26,838 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash -957693967, now seen corresponding path program 1 times [2020-10-19 22:24:26,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:26,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172993260] [2020-10-19 22:24:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:24:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-19 22:24:26,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172993260] [2020-10-19 22:24:26,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:24:26,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 22:24:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230811793] [2020-10-19 22:24:26,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 22:24:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:24:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 22:24:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 22:24:26,949 INFO L87 Difference]: Start difference. First operand 1601 states and 2288 transitions. Second operand 3 states. [2020-10-19 22:24:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:24:27,343 INFO L93 Difference]: Finished difference Result 4783 states and 6836 transitions. [2020-10-19 22:24:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 22:24:27,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-10-19 22:24:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:24:27,384 INFO L225 Difference]: With dead ends: 4783 [2020-10-19 22:24:27,385 INFO L226 Difference]: Without dead ends: 3190 [2020-10-19 22:24:27,393 INFO L677 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 [2020-10-19 22:24:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2020-10-19 22:24:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3188. [2020-10-19 22:24:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3188 states. [2020-10-19 22:24:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 4472 transitions. [2020-10-19 22:24:27,724 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 4472 transitions. Word has length 157 [2020-10-19 22:24:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:24:27,724 INFO L481 AbstractCegarLoop]: Abstraction has 3188 states and 4472 transitions. [2020-10-19 22:24:27,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 22:24:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 4472 transitions. [2020-10-19 22:24:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-19 22:24:27,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:24:27,731 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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] [2020-10-19 22:24:27,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-19 22:24:27,731 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:24:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:24:27,732 INFO L82 PathProgramCache]: Analyzing trace with hash -3753809, now seen corresponding path program 1 times [2020-10-19 22:24:27,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:24:27,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116136511] [2020-10-19 22:24:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:24:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:24:27,778 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:24:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:24:27,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:24:27,945 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:24:27,948 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:24:27,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-19 22:24:28,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:24:28 BoogieIcfgContainer [2020-10-19 22:24:28,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:24:28,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:24:28,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:24:28,113 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:24:28,114 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:24:15" (3/4) ... [2020-10-19 22:24:28,117 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:24:28,350 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:24:28,350 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:24:28,354 INFO L168 Benchmark]: Toolchain (without parser) took 14233.60 ms. Allocated memory was 40.9 MB in the beginning and 144.2 MB in the end (delta: 103.3 MB). Free memory was 18.0 MB in the beginning and 17.1 MB in the end (delta: 898.8 kB). Peak memory consumption was 104.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,355 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 585.52 ms. Allocated memory was 40.9 MB in the beginning and 43.0 MB in the end (delta: 2.1 MB). Free memory was 17.1 MB in the beginning and 24.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.59 ms. Allocated memory is still 43.0 MB. Free memory was 24.8 MB in the beginning and 21.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,357 INFO L168 Benchmark]: Boogie Preprocessor took 43.08 ms. Allocated memory is still 43.0 MB. Free memory was 21.4 MB in the beginning and 18.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,358 INFO L168 Benchmark]: RCFGBuilder took 914.83 ms. Allocated memory was 43.0 MB in the beginning and 47.7 MB in the end (delta: 4.7 MB). Free memory was 18.9 MB in the beginning and 24.4 MB in the end (delta: -5.4 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,358 INFO L168 Benchmark]: TraceAbstraction took 12374.96 ms. Allocated memory was 47.7 MB in the beginning and 144.2 MB in the end (delta: 96.5 MB). Free memory was 24.0 MB in the beginning and 36.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 83.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,359 INFO L168 Benchmark]: Witness Printer took 237.97 ms. Allocated memory is still 144.2 MB. Free memory was 36.8 MB in the beginning and 17.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:24:28,363 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 585.52 ms. Allocated memory was 40.9 MB in the beginning and 43.0 MB in the end (delta: 2.1 MB). Free memory was 17.1 MB in the beginning and 24.8 MB in the end (delta: -7.7 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 65.59 ms. Allocated memory is still 43.0 MB. Free memory was 24.8 MB in the beginning and 21.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 43.08 ms. Allocated memory is still 43.0 MB. Free memory was 21.4 MB in the beginning and 18.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 914.83 ms. Allocated memory was 43.0 MB in the beginning and 47.7 MB in the end (delta: 4.7 MB). Free memory was 18.9 MB in the beginning and 24.4 MB in the end (delta: -5.4 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 12374.96 ms. Allocated memory was 47.7 MB in the beginning and 144.2 MB in the end (delta: 96.5 MB). Free memory was 24.0 MB in the beginning and 36.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 83.7 MB. Max. memory is 14.3 GB. * Witness Printer took 237.97 ms. Allocated memory is still 144.2 MB. Free memory was 36.8 MB in the beginning and 17.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L704] int s ; [L705] int tmp ; [L709] s = 8464 [L14] int s__info_callback = __VERIFIER_nondet_int() ; [L15] int s__in_handshake = __VERIFIER_nondet_int() ; [L16] int s__state ; [L17] int s__new_session ; [L18] int s__server ; [L19] int s__version = __VERIFIER_nondet_int() ; [L20] int s__type ; [L21] int s__init_num ; [L22] int s__hit = __VERIFIER_nondet_int() ; [L23] int s__rwstate ; [L24] int s__init_buf___0 = 1; [L25] int s__debug = __VERIFIER_nondet_int() ; [L26] int s__shutdown ; [L27] int s__cert = __VERIFIER_nondet_int() ; [L28] int s__options = __VERIFIER_nondet_int() ; [L29] int s__verify_mode = __VERIFIER_nondet_int() ; [L30] int s__session__peer = __VERIFIER_nondet_int() ; [L31] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L32] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L35] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L36] int s__s3__tmp__cert_request ; [L37] int s__s3__tmp__reuse_message ; [L38] int s__s3__tmp__use_rsa_tmp ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_cipher__algo_strength ; [L43] int s__session__cipher ; [L44] int buf ; [L45] unsigned long l ; [L46] unsigned long Time ; [L47] unsigned long tmp ; [L48] int cb ; [L49] long num1 = __VERIFIER_nondet_long() ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int got_new_session ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 ; [L62] long tmp___8 = __VERIFIER_nondet_long() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int tmp___10 = __VERIFIER_nondet_int() ; [L65] int blastFlag ; [L66] int __cil_tmp55 ; [L67] unsigned long __cil_tmp56 ; [L68] unsigned long __cil_tmp57 ; [L69] unsigned long __cil_tmp58 ; [L70] unsigned long __cil_tmp59 ; [L71] int __cil_tmp60 ; [L72] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L76] s__state = initial_state [L77] blastFlag = 0 [L78] tmp = __VERIFIER_nondet_int() [L79] Time = tmp [L80] cb = 0 [L81] ret = -1 [L82] skip = 0 [L83] got_new_session = 0 [L84] COND TRUE s__info_callback != 0 [L85] cb = s__info_callback [L91] s__in_handshake ++ [L92] COND FALSE !(tmp___1 + 12288) [L97] COND FALSE !(s__cert == 0) [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND TRUE s__state == 8464 [L274] s__shutdown = 0 [L275] ret = __VERIFIER_nondet_int() [L276] COND TRUE blastFlag == 0 [L277] blastFlag = 1 [L279] COND FALSE !(ret <= 0) [L282] got_new_session = 1 [L283] s__state = 8496 [L284] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND TRUE s__state == 8496 [L288] ret = __VERIFIER_nondet_int() [L289] COND TRUE blastFlag == 1 [L290] blastFlag = 2 [L292] COND FALSE !(ret <= 0) [L295] COND FALSE !(\read(s__hit)) [L298] s__state = 8512 [L300] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND TRUE s__state == 8512 [L305] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L306] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L307] COND TRUE __cil_tmp56 + 256UL [L308] __cil_tmp56 = 256345 [L309] skip = 1 [L320] s__state = 8528 [L321] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND TRUE s__state == 8528 [L325] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L326] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L328] __cil_tmp57 = (unsigned long )s__options [L329] COND TRUE __cil_tmp57 + 2097152UL [L330] s__s3__tmp__use_rsa_tmp = 1 [L335] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L363] ret = __VERIFIER_nondet_int() [L364] COND FALSE !(blastFlag == 3) [L367] COND FALSE !(ret <= 0) [L384] s__state = 8544 [L385] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND FALSE !(s__state == 8528) [L152] COND FALSE !(s__state == 8529) [L155] COND TRUE s__state == 8544 [L389] COND TRUE s__verify_mode + 1 [L390] COND TRUE s__session__peer != 0 [L391] COND TRUE s__verify_mode + 4 [L392] s__verify_mode = 123 [L393] skip = 1 [L394] s__s3__tmp__cert_request = 0 [L395] s__state = 8560 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND FALSE !(! s__s3__tmp__reuse_message) [L688] skip = 0 [L101] COND TRUE 1 [L103] state = s__state [L104] COND FALSE !(s__state == 12292) [L107] COND FALSE !(s__state == 16384) [L110] COND FALSE !(s__state == 8192) [L113] COND FALSE !(s__state == 24576) [L116] COND FALSE !(s__state == 8195) [L119] COND FALSE !(s__state == 8480) [L122] COND FALSE !(s__state == 8481) [L125] COND FALSE !(s__state == 8482) [L128] COND FALSE !(s__state == 8464) [L131] COND FALSE !(s__state == 8465) [L134] COND FALSE !(s__state == 8466) [L137] COND FALSE !(s__state == 8496) [L140] COND FALSE !(s__state == 8497) [L143] COND FALSE !(s__state == 8512) [L146] COND FALSE !(s__state == 8513) [L149] COND FALSE !(s__state == 8528) [L152] COND FALSE !(s__state == 8529) [L155] COND FALSE !(s__state == 8544) [L158] COND FALSE !(s__state == 8545) [L161] COND TRUE s__state == 8560 [L439] ret = __VERIFIER_nondet_int() [L440] COND FALSE !(ret <= 0) [L443] s__s3__tmp__next_state___0 = 8576 [L444] s__state = 8448 [L445] s__init_num = 0 [L653] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L654] COND TRUE ! s__s3__tmp__reuse_message [L655] COND TRUE ! skip [L656] COND TRUE state == 8560 [L657] COND TRUE s__state == 8448 [L658] COND TRUE s__verify_mode != -1 [L659] COND TRUE s__verify_mode != -2 [L660] COND TRUE __cil_tmp61 != 9021 [L661] COND TRUE __cil_tmp58 != 4294967294 [L662] COND TRUE blastFlag != 4 [L663] COND TRUE tmp___7 != 1024 [L3] __assert_fail("0", "s3_srvr_12.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 168 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.1s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7183 SDtfs, 6874 SDslu, 1823 SDs, 0 SdLazy, 2872 SolverSat, 1350 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3188occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 3216 NumberOfCodeBlocks, 3216 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3025 ConstructedInterpolants, 0 QuantifiedInterpolants, 576216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...