./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_7.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 d2a1f90505878c0035f7701a954d17ca4375eb05 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 19:39:15,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:39:15,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:39:15,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:39:15,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:39:15,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:39:15,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:39:15,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:39:15,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:39:15,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:39:15,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:39:15,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:39:15,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:39:15,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:39:15,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:39:15,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:39:15,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:39:15,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:39:15,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:39:15,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:39:15,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:39:15,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:39:15,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:39:15,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:39:15,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:39:15,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:39:15,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:39:15,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:39:15,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:39:15,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:39:15,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:39:15,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:39:15,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:39:15,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:39:15,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:39:15,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:39:15,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:39:15,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:39:15,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:39:15,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:39:15,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:39:15,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:39:15,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:39:15,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:39:15,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:39:15,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:39:15,861 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:39:15,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:39:15,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:39:15,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:39:15,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:39:15,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:39:15,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:39:15,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:39:15,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:39:15,863 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:39:15,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:39:15,864 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:39:15,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:39:15,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:39:15,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:39:15,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:39:15,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:39:15,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:39:15,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:39:15,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:39:15,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:39:15,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:39:15,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:39:15,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:39:15,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:39:15,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a1f90505878c0035f7701a954d17ca4375eb05 [2020-10-25 19:39:16,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:39:16,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:39:16,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:39:16,275 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:39:16,277 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:39:16,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_7.c [2020-10-25 19:39:16,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb94c9da/a8859dad76384f8d945ffed1739dbb15/FLAG0163d4b8f [2020-10-25 19:39:16,931 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:39:16,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_7.c [2020-10-25 19:39:16,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb94c9da/a8859dad76384f8d945ffed1739dbb15/FLAG0163d4b8f [2020-10-25 19:39:17,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb94c9da/a8859dad76384f8d945ffed1739dbb15 [2020-10-25 19:39:17,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:39:17,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:39:17,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:39:17,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:39:17,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:39:17,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20016799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17, skipping insertion in model container [2020-10-25 19:39:17,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:39:17,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:39:17,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:39:17,530 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:39:17,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:39:17,575 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:39:17,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17 WrapperNode [2020-10-25 19:39:17,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:39:17,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:39:17,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:39:17,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:39:17,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:39:17,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:39:17,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:39:17,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:39:17,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (1/1) ... [2020-10-25 19:39:17,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:39:17,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:39:17,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:39:17,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:39:17,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (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 [2020-10-25 19:39:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:39:17,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:39:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:39:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:39:18,125 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:39:18,125 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-25 19:39:18,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:39:18 BoogieIcfgContainer [2020-10-25 19:39:18,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:39:18,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:39:18,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:39:18,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:39:18,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:39:17" (1/3) ... [2020-10-25 19:39:18,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5011687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:39:18, skipping insertion in model container [2020-10-25 19:39:18,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:39:17" (2/3) ... [2020-10-25 19:39:18,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5011687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:39:18, skipping insertion in model container [2020-10-25 19:39:18,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:39:18" (3/3) ... [2020-10-25 19:39:18,143 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-10-25 19:39:18,157 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:39:18,163 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:39:18,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:39:18,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:39:18,212 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:39:18,213 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:39:18,213 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:39:18,214 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:39:18,214 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:39:18,214 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:39:18,214 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:39:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-25 19:39:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 19:39:18,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:18,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:18,240 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:18,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash -882170869, now seen corresponding path program 1 times [2020-10-25 19:39:18,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:18,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43517069] [2020-10-25 19:39:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:18,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43517069] [2020-10-25 19:39:18,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:18,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222415607] [2020-10-25 19:39:18,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:18,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:18,520 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-25 19:39:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:18,581 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-10-25 19:39:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:18,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-25 19:39:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:18,595 INFO L225 Difference]: With dead ends: 66 [2020-10-25 19:39:18,596 INFO L226 Difference]: Without dead ends: 51 [2020-10-25 19:39:18,599 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 [2020-10-25 19:39:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-25 19:39:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2020-10-25 19:39:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-25 19:39:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2020-10-25 19:39:18,640 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 14 [2020-10-25 19:39:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:18,641 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2020-10-25 19:39:18,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2020-10-25 19:39:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 19:39:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:18,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:18,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:39:18,643 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1275197879, now seen corresponding path program 1 times [2020-10-25 19:39:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:18,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317217849] [2020-10-25 19:39:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:18,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317217849] [2020-10-25 19:39:18,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:18,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735935443] [2020-10-25 19:39:18,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:18,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:18,729 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand 3 states. [2020-10-25 19:39:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:18,758 INFO L93 Difference]: Finished difference Result 84 states and 149 transitions. [2020-10-25 19:39:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:18,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-25 19:39:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:18,760 INFO L225 Difference]: With dead ends: 84 [2020-10-25 19:39:18,760 INFO L226 Difference]: Without dead ends: 51 [2020-10-25 19:39:18,762 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 [2020-10-25 19:39:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-25 19:39:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-25 19:39:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-25 19:39:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 86 transitions. [2020-10-25 19:39:18,770 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 86 transitions. Word has length 14 [2020-10-25 19:39:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:18,770 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 86 transitions. [2020-10-25 19:39:18,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 86 transitions. [2020-10-25 19:39:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 19:39:18,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:18,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:18,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:39:18,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1577278843, now seen corresponding path program 1 times [2020-10-25 19:39:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:18,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283723465] [2020-10-25 19:39:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:18,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283723465] [2020-10-25 19:39:18,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:18,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:18,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361328474] [2020-10-25 19:39:18,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:18,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:18,835 INFO L87 Difference]: Start difference. First operand 49 states and 86 transitions. Second operand 3 states. [2020-10-25 19:39:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:18,857 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2020-10-25 19:39:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:18,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-25 19:39:18,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:18,859 INFO L225 Difference]: With dead ends: 78 [2020-10-25 19:39:18,859 INFO L226 Difference]: Without dead ends: 54 [2020-10-25 19:39:18,859 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 [2020-10-25 19:39:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-25 19:39:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-25 19:39:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-25 19:39:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 88 transitions. [2020-10-25 19:39:18,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 88 transitions. Word has length 15 [2020-10-25 19:39:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:18,873 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 88 transitions. [2020-10-25 19:39:18,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 88 transitions. [2020-10-25 19:39:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 19:39:18,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:18,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:18,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 19:39:18,875 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:18,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:18,876 INFO L82 PathProgramCache]: Analyzing trace with hash -876214265, now seen corresponding path program 1 times [2020-10-25 19:39:18,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:18,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867182338] [2020-10-25 19:39:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:18,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867182338] [2020-10-25 19:39:18,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:18,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:18,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153930275] [2020-10-25 19:39:18,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:18,925 INFO L87 Difference]: Start difference. First operand 52 states and 88 transitions. Second operand 3 states. [2020-10-25 19:39:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:18,961 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2020-10-25 19:39:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:18,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-25 19:39:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:18,963 INFO L225 Difference]: With dead ends: 97 [2020-10-25 19:39:18,964 INFO L226 Difference]: Without dead ends: 95 [2020-10-25 19:39:18,964 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 [2020-10-25 19:39:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-25 19:39:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2020-10-25 19:39:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-25 19:39:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-25 19:39:18,975 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 15 [2020-10-25 19:39:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:18,976 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-25 19:39:18,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-25 19:39:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 19:39:18,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:18,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:18,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 19:39:18,978 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1269241275, now seen corresponding path program 1 times [2020-10-25 19:39:18,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:18,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924408949] [2020-10-25 19:39:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924408949] [2020-10-25 19:39:19,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085589261] [2020-10-25 19:39:19,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,048 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 3 states. [2020-10-25 19:39:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,071 INFO L93 Difference]: Finished difference Result 161 states and 275 transitions. [2020-10-25 19:39:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-25 19:39:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,073 INFO L225 Difference]: With dead ends: 161 [2020-10-25 19:39:19,073 INFO L226 Difference]: Without dead ends: 97 [2020-10-25 19:39:19,074 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 [2020-10-25 19:39:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-25 19:39:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-25 19:39:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-25 19:39:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-10-25 19:39:19,086 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 15 [2020-10-25 19:39:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,087 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-10-25 19:39:19,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-10-25 19:39:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 19:39:19,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 19:39:19,089 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1392623778, now seen corresponding path program 1 times [2020-10-25 19:39:19,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129220308] [2020-10-25 19:39:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129220308] [2020-10-25 19:39:19,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851207635] [2020-10-25 19:39:19,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,168 INFO L87 Difference]: Start difference. First operand 95 states and 159 transitions. Second operand 3 states. [2020-10-25 19:39:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,215 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-10-25 19:39:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-25 19:39:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,218 INFO L225 Difference]: With dead ends: 144 [2020-10-25 19:39:19,218 INFO L226 Difference]: Without dead ends: 99 [2020-10-25 19:39:19,222 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 [2020-10-25 19:39:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-25 19:39:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-25 19:39:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-25 19:39:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2020-10-25 19:39:19,244 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 16 [2020-10-25 19:39:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,244 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2020-10-25 19:39:19,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2020-10-25 19:39:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 19:39:19,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 19:39:19,246 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash -691559200, now seen corresponding path program 1 times [2020-10-25 19:39:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717902492] [2020-10-25 19:39:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717902492] [2020-10-25 19:39:19,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272435722] [2020-10-25 19:39:19,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,311 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand 3 states. [2020-10-25 19:39:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,330 INFO L93 Difference]: Finished difference Result 273 states and 449 transitions. [2020-10-25 19:39:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-25 19:39:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,332 INFO L225 Difference]: With dead ends: 273 [2020-10-25 19:39:19,332 INFO L226 Difference]: Without dead ends: 183 [2020-10-25 19:39:19,333 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 [2020-10-25 19:39:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-25 19:39:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-25 19:39:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-25 19:39:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2020-10-25 19:39:19,349 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 16 [2020-10-25 19:39:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,349 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2020-10-25 19:39:19,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2020-10-25 19:39:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 19:39:19,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-25 19:39:19,352 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash -298532190, now seen corresponding path program 1 times [2020-10-25 19:39:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267083553] [2020-10-25 19:39:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267083553] [2020-10-25 19:39:19,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173155817] [2020-10-25 19:39:19,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,383 INFO L87 Difference]: Start difference. First operand 181 states and 291 transitions. Second operand 3 states. [2020-10-25 19:39:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,400 INFO L93 Difference]: Finished difference Result 225 states and 365 transitions. [2020-10-25 19:39:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-25 19:39:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,402 INFO L225 Difference]: With dead ends: 225 [2020-10-25 19:39:19,402 INFO L226 Difference]: Without dead ends: 223 [2020-10-25 19:39:19,403 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 [2020-10-25 19:39:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-25 19:39:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2020-10-25 19:39:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-25 19:39:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2020-10-25 19:39:19,424 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 16 [2020-10-25 19:39:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2020-10-25 19:39:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2020-10-25 19:39:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 19:39:19,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-25 19:39:19,427 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash 36716282, now seen corresponding path program 1 times [2020-10-25 19:39:19,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319600424] [2020-10-25 19:39:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319600424] [2020-10-25 19:39:19,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293271383] [2020-10-25 19:39:19,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,476 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand 3 states. [2020-10-25 19:39:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,505 INFO L93 Difference]: Finished difference Result 325 states and 521 transitions. [2020-10-25 19:39:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-25 19:39:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,508 INFO L225 Difference]: With dead ends: 325 [2020-10-25 19:39:19,509 INFO L226 Difference]: Without dead ends: 323 [2020-10-25 19:39:19,510 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 [2020-10-25 19:39:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-25 19:39:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 257. [2020-10-25 19:39:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-25 19:39:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 399 transitions. [2020-10-25 19:39:19,531 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 399 transitions. Word has length 17 [2020-10-25 19:39:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,531 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 399 transitions. [2020-10-25 19:39:19,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 399 transitions. [2020-10-25 19:39:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 19:39:19,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-25 19:39:19,535 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,536 INFO L82 PathProgramCache]: Analyzing trace with hash -356310728, now seen corresponding path program 1 times [2020-10-25 19:39:19,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435015019] [2020-10-25 19:39:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435015019] [2020-10-25 19:39:19,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258267306] [2020-10-25 19:39:19,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,567 INFO L87 Difference]: Start difference. First operand 257 states and 399 transitions. Second operand 3 states. [2020-10-25 19:39:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,592 INFO L93 Difference]: Finished difference Result 597 states and 929 transitions. [2020-10-25 19:39:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-25 19:39:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,596 INFO L225 Difference]: With dead ends: 597 [2020-10-25 19:39:19,596 INFO L226 Difference]: Without dead ends: 347 [2020-10-25 19:39:19,598 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 [2020-10-25 19:39:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-25 19:39:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2020-10-25 19:39:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-25 19:39:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2020-10-25 19:39:19,619 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 17 [2020-10-25 19:39:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,619 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2020-10-25 19:39:19,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2020-10-25 19:39:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:39:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-25 19:39:19,623 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1138420085, now seen corresponding path program 1 times [2020-10-25 19:39:19,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213267526] [2020-10-25 19:39:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213267526] [2020-10-25 19:39:19,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414184439] [2020-10-25 19:39:19,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,688 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand 3 states. [2020-10-25 19:39:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,716 INFO L93 Difference]: Finished difference Result 525 states and 793 transitions. [2020-10-25 19:39:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:39:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,719 INFO L225 Difference]: With dead ends: 525 [2020-10-25 19:39:19,720 INFO L226 Difference]: Without dead ends: 359 [2020-10-25 19:39:19,722 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 [2020-10-25 19:39:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-25 19:39:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2020-10-25 19:39:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-25 19:39:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 531 transitions. [2020-10-25 19:39:19,754 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 531 transitions. Word has length 18 [2020-10-25 19:39:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,755 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 531 transitions. [2020-10-25 19:39:19,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 531 transitions. [2020-10-25 19:39:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:39:19,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-25 19:39:19,763 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1839484663, now seen corresponding path program 1 times [2020-10-25 19:39:19,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986857753] [2020-10-25 19:39:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986857753] [2020-10-25 19:39:19,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796987138] [2020-10-25 19:39:19,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,836 INFO L87 Difference]: Start difference. First operand 357 states and 531 transitions. Second operand 3 states. [2020-10-25 19:39:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:19,882 INFO L93 Difference]: Finished difference Result 617 states and 925 transitions. [2020-10-25 19:39:19,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:19,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:39:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:19,888 INFO L225 Difference]: With dead ends: 617 [2020-10-25 19:39:19,888 INFO L226 Difference]: Without dead ends: 615 [2020-10-25 19:39:19,889 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 [2020-10-25 19:39:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-10-25 19:39:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 517. [2020-10-25 19:39:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-25 19:39:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 747 transitions. [2020-10-25 19:39:19,913 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 747 transitions. Word has length 18 [2020-10-25 19:39:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:19,913 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 747 transitions. [2020-10-25 19:39:19,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 747 transitions. [2020-10-25 19:39:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 19:39:19,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:19,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:19,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-25 19:39:19,923 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1446457653, now seen corresponding path program 1 times [2020-10-25 19:39:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:19,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639237479] [2020-10-25 19:39:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:19,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639237479] [2020-10-25 19:39:19,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:19,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:19,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415521295] [2020-10-25 19:39:19,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:19,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:19,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:19,975 INFO L87 Difference]: Start difference. First operand 517 states and 747 transitions. Second operand 3 states. [2020-10-25 19:39:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,008 INFO L93 Difference]: Finished difference Result 1177 states and 1693 transitions. [2020-10-25 19:39:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-25 19:39:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,021 INFO L225 Difference]: With dead ends: 1177 [2020-10-25 19:39:20,022 INFO L226 Difference]: Without dead ends: 679 [2020-10-25 19:39:20,023 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 [2020-10-25 19:39:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-10-25 19:39:20,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2020-10-25 19:39:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2020-10-25 19:39:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 947 transitions. [2020-10-25 19:39:20,049 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 947 transitions. Word has length 18 [2020-10-25 19:39:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,052 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 947 transitions. [2020-10-25 19:39:20,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 947 transitions. [2020-10-25 19:39:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:39:20,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:20,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:20,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-25 19:39:20,058 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:20,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1189665389, now seen corresponding path program 1 times [2020-10-25 19:39:20,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:20,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934096871] [2020-10-25 19:39:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934096871] [2020-10-25 19:39:20,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:20,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:20,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646923287] [2020-10-25 19:39:20,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:20,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:20,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:20,117 INFO L87 Difference]: Start difference. First operand 677 states and 947 transitions. Second operand 3 states. [2020-10-25 19:39:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,149 INFO L93 Difference]: Finished difference Result 1017 states and 1413 transitions. [2020-10-25 19:39:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-25 19:39:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,154 INFO L225 Difference]: With dead ends: 1017 [2020-10-25 19:39:20,154 INFO L226 Difference]: Without dead ends: 695 [2020-10-25 19:39:20,156 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 [2020-10-25 19:39:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-25 19:39:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 693. [2020-10-25 19:39:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-10-25 19:39:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 947 transitions. [2020-10-25 19:39:20,185 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 947 transitions. Word has length 19 [2020-10-25 19:39:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,186 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 947 transitions. [2020-10-25 19:39:20,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 947 transitions. [2020-10-25 19:39:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:39:20,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:20,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:20,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-25 19:39:20,190 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1890729967, now seen corresponding path program 1 times [2020-10-25 19:39:20,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:20,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519888420] [2020-10-25 19:39:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:20,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519888420] [2020-10-25 19:39:20,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:20,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:20,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25552226] [2020-10-25 19:39:20,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:20,223 INFO L87 Difference]: Start difference. First operand 693 states and 947 transitions. Second operand 3 states. [2020-10-25 19:39:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,253 INFO L93 Difference]: Finished difference Result 1161 states and 1589 transitions. [2020-10-25 19:39:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-25 19:39:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,260 INFO L225 Difference]: With dead ends: 1161 [2020-10-25 19:39:20,260 INFO L226 Difference]: Without dead ends: 1159 [2020-10-25 19:39:20,261 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 [2020-10-25 19:39:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-10-25 19:39:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1029. [2020-10-25 19:39:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2020-10-25 19:39:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1363 transitions. [2020-10-25 19:39:20,293 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1363 transitions. Word has length 19 [2020-10-25 19:39:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,294 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1363 transitions. [2020-10-25 19:39:20,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1363 transitions. [2020-10-25 19:39:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 19:39:20,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:20,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:39:20,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-25 19:39:20,298 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1497702957, now seen corresponding path program 1 times [2020-10-25 19:39:20,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:20,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103471604] [2020-10-25 19:39:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:20,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103471604] [2020-10-25 19:39:20,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:20,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916451292] [2020-10-25 19:39:20,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:20,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:20,330 INFO L87 Difference]: Start difference. First operand 1029 states and 1363 transitions. Second operand 3 states. [2020-10-25 19:39:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,372 INFO L93 Difference]: Finished difference Result 2313 states and 3029 transitions. [2020-10-25 19:39:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-25 19:39:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,380 INFO L225 Difference]: With dead ends: 2313 [2020-10-25 19:39:20,381 INFO L226 Difference]: Without dead ends: 1319 [2020-10-25 19:39:20,384 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 [2020-10-25 19:39:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2020-10-25 19:39:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2020-10-25 19:39:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1317 states. [2020-10-25 19:39:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1667 transitions. [2020-10-25 19:39:20,432 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1667 transitions. Word has length 19 [2020-10-25 19:39:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,432 INFO L481 AbstractCegarLoop]: Abstraction has 1317 states and 1667 transitions. [2020-10-25 19:39:20,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1667 transitions. [2020-10-25 19:39:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:39:20,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:20,436 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] [2020-10-25 19:39:20,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-25 19:39:20,437 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1516697142, now seen corresponding path program 1 times [2020-10-25 19:39:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213106433] [2020-10-25 19:39:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:20,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213106433] [2020-10-25 19:39:20,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:20,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:20,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736787606] [2020-10-25 19:39:20,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:20,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:20,470 INFO L87 Difference]: Start difference. First operand 1317 states and 1667 transitions. Second operand 3 states. [2020-10-25 19:39:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,509 INFO L93 Difference]: Finished difference Result 1977 states and 2485 transitions. [2020-10-25 19:39:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:39:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,519 INFO L225 Difference]: With dead ends: 1977 [2020-10-25 19:39:20,519 INFO L226 Difference]: Without dead ends: 1351 [2020-10-25 19:39:20,521 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 [2020-10-25 19:39:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2020-10-25 19:39:20,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2020-10-25 19:39:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2020-10-25 19:39:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1667 transitions. [2020-10-25 19:39:20,580 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1667 transitions. Word has length 20 [2020-10-25 19:39:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,580 INFO L481 AbstractCegarLoop]: Abstraction has 1349 states and 1667 transitions. [2020-10-25 19:39:20,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1667 transitions. [2020-10-25 19:39:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:39:20,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:20,583 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] [2020-10-25 19:39:20,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-25 19:39:20,583 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -815632564, now seen corresponding path program 1 times [2020-10-25 19:39:20,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435845149] [2020-10-25 19:39:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435845149] [2020-10-25 19:39:20,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:20,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:20,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455820399] [2020-10-25 19:39:20,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:20,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:20,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:20,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:20,613 INFO L87 Difference]: Start difference. First operand 1349 states and 1667 transitions. Second operand 3 states. [2020-10-25 19:39:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,663 INFO L93 Difference]: Finished difference Result 2183 states and 2660 transitions. [2020-10-25 19:39:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:39:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,672 INFO L225 Difference]: With dead ends: 2183 [2020-10-25 19:39:20,673 INFO L226 Difference]: Without dead ends: 2181 [2020-10-25 19:39:20,674 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 [2020-10-25 19:39:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-10-25 19:39:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2053. [2020-10-25 19:39:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2020-10-25 19:39:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2467 transitions. [2020-10-25 19:39:20,731 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2467 transitions. Word has length 20 [2020-10-25 19:39:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,731 INFO L481 AbstractCegarLoop]: Abstraction has 2053 states and 2467 transitions. [2020-10-25 19:39:20,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2467 transitions. [2020-10-25 19:39:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:39:20,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:39:20,752 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] [2020-10-25 19:39:20,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-25 19:39:20,752 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:39:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:39:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1208659574, now seen corresponding path program 1 times [2020-10-25 19:39:20,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:39:20,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550849048] [2020-10-25 19:39:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:39:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:39:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:39:20,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550849048] [2020-10-25 19:39:20,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:39:20,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:39:20,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903366134] [2020-10-25 19:39:20,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:39:20,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:39:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:39:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:39:20,785 INFO L87 Difference]: Start difference. First operand 2053 states and 2467 transitions. Second operand 3 states. [2020-10-25 19:39:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:39:20,861 INFO L93 Difference]: Finished difference Result 4549 states and 5347 transitions. [2020-10-25 19:39:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:39:20,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-25 19:39:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:39:20,862 INFO L225 Difference]: With dead ends: 4549 [2020-10-25 19:39:20,862 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 19:39:20,868 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 [2020-10-25 19:39:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 19:39:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 19:39:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 19:39:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 19:39:20,869 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-10-25 19:39:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:39:20,869 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 19:39:20,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:39:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 19:39:20,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 19:39:20,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-25 19:39:20,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 19:39:20,907 INFO L274 CegarLoopResult]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point L94(line 94) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L274 CegarLoopResult]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,908 INFO L277 CegarLoopResult]: At program point L119(lines 7 123) the Hoare annotation is: true [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L53(lines 53 55) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L277 CegarLoopResult]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2020-10-25 19:39:20,909 INFO L277 CegarLoopResult]: At program point L122(lines 6 123) the Hoare annotation is: true [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-10-25 19:39:20,909 INFO L270 CegarLoopResult]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2020-10-25 19:39:20,909 INFO L274 CegarLoopResult]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,910 INFO L274 CegarLoopResult]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,910 INFO L274 CegarLoopResult]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,910 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 19:39:20,910 INFO L274 CegarLoopResult]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,911 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 19:39:20,911 INFO L274 CegarLoopResult]: For program point L99(line 99) no Hoare annotation was computed. [2020-10-25 19:39:20,911 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 19:39:20,911 INFO L274 CegarLoopResult]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,911 INFO L274 CegarLoopResult]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2020-10-25 19:39:20,911 INFO L274 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-25 19:39:20,912 INFO L274 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-10-25 19:39:20,912 INFO L274 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-10-25 19:39:20,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:39:20 BoogieIcfgContainer [2020-10-25 19:39:20,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:39:20,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:39:20,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:39:20,930 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:39:20,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:39:18" (3/4) ... [2020-10-25 19:39:20,935 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 19:39:20,950 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-25 19:39:20,951 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 19:39:20,951 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 19:39:20,951 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 19:39:21,015 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:39:21,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:39:21,017 INFO L168 Benchmark]: Toolchain (without parser) took 3757.89 ms. Allocated memory was 46.1 MB in the beginning and 83.9 MB in the end (delta: 37.7 MB). Free memory was 23.5 MB in the beginning and 32.7 MB in the end (delta: -9.1 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:21,018 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 46.1 MB. Free memory was 32.9 MB in the beginning and 32.9 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:39:21,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.09 ms. Allocated memory is still 46.1 MB. Free memory was 22.9 MB in the beginning and 24.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:21,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.06 ms. Allocated memory is still 46.1 MB. Free memory was 24.3 MB in the beginning and 22.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:21,019 INFO L168 Benchmark]: Boogie Preprocessor took 29.02 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 21.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:39:21,020 INFO L168 Benchmark]: RCFGBuilder took 475.81 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 26.9 MB in the end (delta: -5.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:21,020 INFO L168 Benchmark]: TraceAbstraction took 2798.61 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 26.5 MB in the beginning and 36.4 MB in the end (delta: -9.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:21,021 INFO L168 Benchmark]: Witness Printer took 85.93 ms. Allocated memory is still 83.9 MB. Free memory was 36.4 MB in the beginning and 32.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:39:21,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 46.1 MB. Free memory was 32.9 MB in the beginning and 32.9 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.09 ms. Allocated memory is still 46.1 MB. Free memory was 22.9 MB in the beginning and 24.3 MB in the end (delta: -1.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.06 ms. Allocated memory is still 46.1 MB. Free memory was 24.3 MB in the beginning and 22.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.02 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 21.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 475.81 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 26.9 MB in the end (delta: -5.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2798.61 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 26.5 MB in the beginning and 36.4 MB in the end (delta: -9.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * Witness Printer took 85.93 ms. Allocated memory is still 83.9 MB. Free memory was 36.4 MB in the beginning and 32.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1128 SDtfs, 543 SDslu, 729 SDs, 0 SdLazy, 101 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2053occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 137 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 10138 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...