./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_11.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93221bc263791497331acd2a7a0150037c621aa ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:16:09,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:16:09,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:16:09,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:16:09,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:16:09,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:16:09,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:16:09,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:16:09,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:16:09,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:16:09,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:16:09,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:16:09,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:16:09,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:16:09,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:16:09,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:16:09,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:16:09,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:16:09,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:16:09,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:16:09,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:16:09,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:16:09,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:16:09,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:16:09,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:16:09,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:16:09,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:16:09,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:16:09,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:16:09,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:16:09,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:16:09,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:16:09,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:16:09,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:16:09,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:16:09,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:16:09,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:16:09,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:16:09,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:16:09,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:16:09,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:16:09,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:16:09,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:16:09,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:16:09,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:16:09,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:16:09,237 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:16:09,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:16:09,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:16:09,238 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:16:09,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:16:09,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:16:09,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:16:09,239 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:16:09,239 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:16:09,239 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:16:09,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:16:09,240 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:16:09,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:16:09,240 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:16:09,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:16:09,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:16:09,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:16:09,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:16:09,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:16:09,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:16:09,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:16:09,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:16:09,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:16:09,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:16:09,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> a93221bc263791497331acd2a7a0150037c621aa [2020-10-20 06:16:09,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:16:09,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:16:09,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:16:09,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:16:09,508 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:16:09,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_11.c [2020-10-20 06:16:09,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f247d213/86d43de492514326abcf6507bb0f7f7e/FLAGec530c2e6 [2020-10-20 06:16:10,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:16:10,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_11.c [2020-10-20 06:16:10,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f247d213/86d43de492514326abcf6507bb0f7f7e/FLAGec530c2e6 [2020-10-20 06:16:10,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f247d213/86d43de492514326abcf6507bb0f7f7e [2020-10-20 06:16:10,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:16:10,549 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:16:10,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:10,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:16:10,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:16:10,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613ffd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10, skipping insertion in model container [2020-10-20 06:16:10,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:16:10,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:16:10,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:10,811 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:16:10,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:16:10,861 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:16:10,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10 WrapperNode [2020-10-20 06:16:10,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:16:10,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:16:10,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:16:10,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:16:10,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (1/1) ... [2020-10-20 06:16:10,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:16:10,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:16:10,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:16:10,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:16:10,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (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 [2020-10-20 06:16:10,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:16:10,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:16:10,999 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:16:10,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:16:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:16:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:16:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:16:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:16:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:16:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:16:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:16:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:16:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:16:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:16:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:16:11,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:16:11,377 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:16:11,378 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-20 06:16:11,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:11 BoogieIcfgContainer [2020-10-20 06:16:11,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:16:11,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:16:11,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:16:11,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:16:11,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:16:10" (1/3) ... [2020-10-20 06:16:11,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8b93dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:11, skipping insertion in model container [2020-10-20 06:16:11,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:16:10" (2/3) ... [2020-10-20 06:16:11,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8b93dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:16:11, skipping insertion in model container [2020-10-20 06:16:11,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:11" (3/3) ... [2020-10-20 06:16:11,391 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-10-20 06:16:11,404 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:16:11,411 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:16:11,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:16:11,451 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:16:11,451 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:16:11,451 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:16:11,452 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:16:11,457 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:16:11,458 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:16:11,458 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:16:11,458 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:16:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-20 06:16:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:16:11,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:11,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:11,490 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1012612054, now seen corresponding path program 1 times [2020-10-20 06:16:11,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:11,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597864142] [2020-10-20 06:16:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:11,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:11,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597864142] [2020-10-20 06:16:11,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:11,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:16:11,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308102581] [2020-10-20 06:16:11,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:16:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:16:11,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:11,810 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-10-20 06:16:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:11,860 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2020-10-20 06:16:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:16:11,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:16:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:11,873 INFO L225 Difference]: With dead ends: 49 [2020-10-20 06:16:11,874 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 06:16:11,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:16:11,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 06:16:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-20 06:16:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-20 06:16:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 76 transitions. [2020-10-20 06:16:11,916 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 76 transitions. Word has length 9 [2020-10-20 06:16:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:11,917 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 76 transitions. [2020-10-20 06:16:11,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:16:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 76 transitions. [2020-10-20 06:16:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:11,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:11,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:11,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:16:11,919 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2067841466, now seen corresponding path program 1 times [2020-10-20 06:16:11,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:11,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24101728] [2020-10-20 06:16:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:12,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:12,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24101728] [2020-10-20 06:16:12,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:12,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:12,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036883863] [2020-10-20 06:16:12,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:12,097 INFO L87 Difference]: Start difference. First operand 44 states and 76 transitions. Second operand 4 states. [2020-10-20 06:16:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:12,306 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2020-10-20 06:16:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:12,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:12,309 INFO L225 Difference]: With dead ends: 79 [2020-10-20 06:16:12,310 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 06:16:12,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 06:16:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-20 06:16:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-20 06:16:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-10-20 06:16:12,323 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-10-20 06:16:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:12,323 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-10-20 06:16:12,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-10-20 06:16:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:16:12,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:12,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:12,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:16:12,337 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash 947262152, now seen corresponding path program 1 times [2020-10-20 06:16:12,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:12,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164826674] [2020-10-20 06:16:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:12,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:12,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164826674] [2020-10-20 06:16:12,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:12,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:12,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398085085] [2020-10-20 06:16:12,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:12,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:12,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:12,433 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-10-20 06:16:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:12,629 INFO L93 Difference]: Finished difference Result 79 states and 140 transitions. [2020-10-20 06:16:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:12,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:16:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:12,632 INFO L225 Difference]: With dead ends: 79 [2020-10-20 06:16:12,632 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 06:16:12,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 06:16:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-20 06:16:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-20 06:16:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-10-20 06:16:12,643 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-10-20 06:16:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:12,644 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-10-20 06:16:12,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-10-20 06:16:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:12,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:12,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:12,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:16:12,646 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash 328021414, now seen corresponding path program 1 times [2020-10-20 06:16:12,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:12,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615994571] [2020-10-20 06:16:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:12,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:12,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615994571] [2020-10-20 06:16:12,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:12,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119650568] [2020-10-20 06:16:12,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:12,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:12,755 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-10-20 06:16:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:12,947 INFO L93 Difference]: Finished difference Result 82 states and 142 transitions. [2020-10-20 06:16:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:12,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:12,949 INFO L225 Difference]: With dead ends: 82 [2020-10-20 06:16:12,950 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 06:16:12,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 06:16:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-20 06:16:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-20 06:16:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 141 transitions. [2020-10-20 06:16:12,959 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 141 transitions. Word has length 24 [2020-10-20 06:16:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:12,959 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 141 transitions. [2020-10-20 06:16:12,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-10-20 06:16:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:12,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:12,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:12,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:16:12,965 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash -693046940, now seen corresponding path program 1 times [2020-10-20 06:16:12,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:12,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597010379] [2020-10-20 06:16:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:13,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597010379] [2020-10-20 06:16:13,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:13,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:13,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63058580] [2020-10-20 06:16:13,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:13,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:13,093 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 4 states. [2020-10-20 06:16:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:13,321 INFO L93 Difference]: Finished difference Result 149 states and 263 transitions. [2020-10-20 06:16:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:13,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:13,324 INFO L225 Difference]: With dead ends: 149 [2020-10-20 06:16:13,324 INFO L226 Difference]: Without dead ends: 149 [2020-10-20 06:16:13,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-20 06:16:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-20 06:16:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-20 06:16:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 262 transitions. [2020-10-20 06:16:13,344 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 262 transitions. Word has length 24 [2020-10-20 06:16:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:13,345 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 262 transitions. [2020-10-20 06:16:13,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 262 transitions. [2020-10-20 06:16:13,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:16:13,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:13,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:13,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:16:13,348 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:13,348 INFO L82 PathProgramCache]: Analyzing trace with hash 586816738, now seen corresponding path program 1 times [2020-10-20 06:16:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:13,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074001892] [2020-10-20 06:16:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:13,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074001892] [2020-10-20 06:16:13,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:13,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:13,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122408980] [2020-10-20 06:16:13,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:13,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:13,416 INFO L87 Difference]: Start difference. First operand 148 states and 262 transitions. Second operand 4 states. [2020-10-20 06:16:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:13,578 INFO L93 Difference]: Finished difference Result 189 states and 337 transitions. [2020-10-20 06:16:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:13,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-20 06:16:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:13,581 INFO L225 Difference]: With dead ends: 189 [2020-10-20 06:16:13,581 INFO L226 Difference]: Without dead ends: 189 [2020-10-20 06:16:13,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-20 06:16:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2020-10-20 06:16:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-20 06:16:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 260 transitions. [2020-10-20 06:16:13,591 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 260 transitions. Word has length 24 [2020-10-20 06:16:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:13,592 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 260 transitions. [2020-10-20 06:16:13,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 260 transitions. [2020-10-20 06:16:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:13,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:13,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:13,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:16:13,595 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -3010669, now seen corresponding path program 1 times [2020-10-20 06:16:13,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:13,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607119208] [2020-10-20 06:16:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:13,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607119208] [2020-10-20 06:16:13,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:13,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:13,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206685634] [2020-10-20 06:16:13,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:13,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:13,653 INFO L87 Difference]: Start difference. First operand 148 states and 260 transitions. Second operand 4 states. [2020-10-20 06:16:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:13,814 INFO L93 Difference]: Finished difference Result 273 states and 487 transitions. [2020-10-20 06:16:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:13,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:13,817 INFO L225 Difference]: With dead ends: 273 [2020-10-20 06:16:13,818 INFO L226 Difference]: Without dead ends: 273 [2020-10-20 06:16:13,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-20 06:16:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2020-10-20 06:16:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-20 06:16:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 350 transitions. [2020-10-20 06:16:13,830 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 350 transitions. Word has length 25 [2020-10-20 06:16:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:13,830 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 350 transitions. [2020-10-20 06:16:13,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 350 transitions. [2020-10-20 06:16:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 06:16:13,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:13,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:13,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:16:13,836 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1282874347, now seen corresponding path program 1 times [2020-10-20 06:16:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:13,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955793143] [2020-10-20 06:16:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:13,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955793143] [2020-10-20 06:16:13,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:13,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:13,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481710765] [2020-10-20 06:16:13,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:13,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:13,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:13,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:13,903 INFO L87 Difference]: Start difference. First operand 200 states and 350 transitions. Second operand 4 states. [2020-10-20 06:16:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:14,054 INFO L93 Difference]: Finished difference Result 281 states and 489 transitions. [2020-10-20 06:16:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:14,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 06:16:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:14,057 INFO L225 Difference]: With dead ends: 281 [2020-10-20 06:16:14,057 INFO L226 Difference]: Without dead ends: 281 [2020-10-20 06:16:14,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-20 06:16:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2020-10-20 06:16:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-20 06:16:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 488 transitions. [2020-10-20 06:16:14,083 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 488 transitions. Word has length 25 [2020-10-20 06:16:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:14,083 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 488 transitions. [2020-10-20 06:16:14,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 488 transitions. [2020-10-20 06:16:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:14,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:14,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:14,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:16:14,092 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:14,092 INFO L82 PathProgramCache]: Analyzing trace with hash -86712177, now seen corresponding path program 1 times [2020-10-20 06:16:14,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:14,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705601823] [2020-10-20 06:16:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:14,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705601823] [2020-10-20 06:16:14,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:14,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274866309] [2020-10-20 06:16:14,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:14,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:14,177 INFO L87 Difference]: Start difference. First operand 280 states and 488 transitions. Second operand 4 states. [2020-10-20 06:16:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:14,325 INFO L93 Difference]: Finished difference Result 287 states and 493 transitions. [2020-10-20 06:16:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:14,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:14,333 INFO L225 Difference]: With dead ends: 287 [2020-10-20 06:16:14,333 INFO L226 Difference]: Without dead ends: 287 [2020-10-20 06:16:14,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-20 06:16:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-10-20 06:16:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-20 06:16:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 492 transitions. [2020-10-20 06:16:14,344 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 492 transitions. Word has length 26 [2020-10-20 06:16:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:14,345 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 492 transitions. [2020-10-20 06:16:14,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 492 transitions. [2020-10-20 06:16:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:14,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:14,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:14,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:16:14,351 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1107780531, now seen corresponding path program 1 times [2020-10-20 06:16:14,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:14,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468317709] [2020-10-20 06:16:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:14,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468317709] [2020-10-20 06:16:14,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:14,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:14,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351002733] [2020-10-20 06:16:14,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:14,436 INFO L87 Difference]: Start difference. First operand 286 states and 492 transitions. Second operand 4 states. [2020-10-20 06:16:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:14,585 INFO L93 Difference]: Finished difference Result 523 states and 909 transitions. [2020-10-20 06:16:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:14,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:14,589 INFO L225 Difference]: With dead ends: 523 [2020-10-20 06:16:14,589 INFO L226 Difference]: Without dead ends: 523 [2020-10-20 06:16:14,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-20 06:16:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 394. [2020-10-20 06:16:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-20 06:16:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 668 transitions. [2020-10-20 06:16:14,600 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 668 transitions. Word has length 26 [2020-10-20 06:16:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:14,601 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 668 transitions. [2020-10-20 06:16:14,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 668 transitions. [2020-10-20 06:16:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 06:16:14,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:14,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:14,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:16:14,603 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1907323087, now seen corresponding path program 1 times [2020-10-20 06:16:14,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:14,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26894534] [2020-10-20 06:16:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:14,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26894534] [2020-10-20 06:16:14,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:14,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:14,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033708682] [2020-10-20 06:16:14,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:14,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:14,659 INFO L87 Difference]: Start difference. First operand 394 states and 668 transitions. Second operand 4 states. [2020-10-20 06:16:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:14,809 INFO L93 Difference]: Finished difference Result 547 states and 921 transitions. [2020-10-20 06:16:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:14,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-20 06:16:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:14,813 INFO L225 Difference]: With dead ends: 547 [2020-10-20 06:16:14,813 INFO L226 Difference]: Without dead ends: 547 [2020-10-20 06:16:14,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-20 06:16:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2020-10-20 06:16:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-20 06:16:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 920 transitions. [2020-10-20 06:16:14,828 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 920 transitions. Word has length 26 [2020-10-20 06:16:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:14,829 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 920 transitions. [2020-10-20 06:16:14,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:14,829 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 920 transitions. [2020-10-20 06:16:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:14,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:14,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:14,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:16:14,831 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash 25171040, now seen corresponding path program 1 times [2020-10-20 06:16:14,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:14,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309197312] [2020-10-20 06:16:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:14,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309197312] [2020-10-20 06:16:14,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:14,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:14,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551927399] [2020-10-20 06:16:14,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:14,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:14,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:14,881 INFO L87 Difference]: Start difference. First operand 546 states and 920 transitions. Second operand 4 states. [2020-10-20 06:16:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:15,028 INFO L93 Difference]: Finished difference Result 555 states and 921 transitions. [2020-10-20 06:16:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:15,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:15,032 INFO L225 Difference]: With dead ends: 555 [2020-10-20 06:16:15,032 INFO L226 Difference]: Without dead ends: 555 [2020-10-20 06:16:15,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-20 06:16:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 554. [2020-10-20 06:16:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-20 06:16:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 920 transitions. [2020-10-20 06:16:15,048 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 920 transitions. Word has length 27 [2020-10-20 06:16:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:15,048 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 920 transitions. [2020-10-20 06:16:15,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 920 transitions. [2020-10-20 06:16:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:15,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:15,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:15,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:16:15,051 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash -995897314, now seen corresponding path program 1 times [2020-10-20 06:16:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:15,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287900543] [2020-10-20 06:16:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287900543] [2020-10-20 06:16:15,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:15,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:15,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911892691] [2020-10-20 06:16:15,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:15,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:15,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:15,105 INFO L87 Difference]: Start difference. First operand 554 states and 920 transitions. Second operand 4 states. [2020-10-20 06:16:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:15,254 INFO L93 Difference]: Finished difference Result 1003 states and 1681 transitions. [2020-10-20 06:16:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:15,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:15,260 INFO L225 Difference]: With dead ends: 1003 [2020-10-20 06:16:15,261 INFO L226 Difference]: Without dead ends: 1003 [2020-10-20 06:16:15,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-10-20 06:16:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 778. [2020-10-20 06:16:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-20 06:16:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1264 transitions. [2020-10-20 06:16:15,282 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1264 transitions. Word has length 27 [2020-10-20 06:16:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:15,282 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1264 transitions. [2020-10-20 06:16:15,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1264 transitions. [2020-10-20 06:16:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:16:15,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:15,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:15,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:16:15,285 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2019206304, now seen corresponding path program 1 times [2020-10-20 06:16:15,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:15,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533464441] [2020-10-20 06:16:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:15,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533464441] [2020-10-20 06:16:15,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:15,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244999558] [2020-10-20 06:16:15,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:15,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:15,331 INFO L87 Difference]: Start difference. First operand 778 states and 1264 transitions. Second operand 4 states. [2020-10-20 06:16:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:15,486 INFO L93 Difference]: Finished difference Result 1067 states and 1721 transitions. [2020-10-20 06:16:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:15,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-20 06:16:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:15,492 INFO L225 Difference]: With dead ends: 1067 [2020-10-20 06:16:15,492 INFO L226 Difference]: Without dead ends: 1067 [2020-10-20 06:16:15,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-10-20 06:16:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1066. [2020-10-20 06:16:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-10-20 06:16:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1720 transitions. [2020-10-20 06:16:15,523 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1720 transitions. Word has length 27 [2020-10-20 06:16:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:15,524 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1720 transitions. [2020-10-20 06:16:15,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1720 transitions. [2020-10-20 06:16:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:15,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:15,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:15,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:16:15,527 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -801405958, now seen corresponding path program 1 times [2020-10-20 06:16:15,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:15,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870002391] [2020-10-20 06:16:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870002391] [2020-10-20 06:16:15,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:15,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:15,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428272764] [2020-10-20 06:16:15,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:15,582 INFO L87 Difference]: Start difference. First operand 1066 states and 1720 transitions. Second operand 4 states. [2020-10-20 06:16:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:15,731 INFO L93 Difference]: Finished difference Result 1083 states and 1721 transitions. [2020-10-20 06:16:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:15,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:15,739 INFO L225 Difference]: With dead ends: 1083 [2020-10-20 06:16:15,739 INFO L226 Difference]: Without dead ends: 1083 [2020-10-20 06:16:15,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-10-20 06:16:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1082. [2020-10-20 06:16:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-10-20 06:16:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1720 transitions. [2020-10-20 06:16:15,769 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1720 transitions. Word has length 28 [2020-10-20 06:16:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:15,769 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1720 transitions. [2020-10-20 06:16:15,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1720 transitions. [2020-10-20 06:16:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:15,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:15,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:15,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-20 06:16:15,772 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1822474312, now seen corresponding path program 1 times [2020-10-20 06:16:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:15,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880566684] [2020-10-20 06:16:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:15,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880566684] [2020-10-20 06:16:15,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:15,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:15,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472363304] [2020-10-20 06:16:15,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:15,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:15,817 INFO L87 Difference]: Start difference. First operand 1082 states and 1720 transitions. Second operand 4 states. [2020-10-20 06:16:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:15,955 INFO L93 Difference]: Finished difference Result 1931 states and 3097 transitions. [2020-10-20 06:16:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:15,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:15,966 INFO L225 Difference]: With dead ends: 1931 [2020-10-20 06:16:15,966 INFO L226 Difference]: Without dead ends: 1931 [2020-10-20 06:16:15,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-10-20 06:16:15,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1546. [2020-10-20 06:16:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-20 06:16:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2392 transitions. [2020-10-20 06:16:16,002 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2392 transitions. Word has length 28 [2020-10-20 06:16:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:16,003 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2392 transitions. [2020-10-20 06:16:16,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2392 transitions. [2020-10-20 06:16:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:16:16,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:16,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:16,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 06:16:16,006 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1192629306, now seen corresponding path program 1 times [2020-10-20 06:16:16,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:16,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327150193] [2020-10-20 06:16:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:16,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:16,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327150193] [2020-10-20 06:16:16,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:16,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:16,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738949137] [2020-10-20 06:16:16,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:16,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:16,052 INFO L87 Difference]: Start difference. First operand 1546 states and 2392 transitions. Second operand 4 states. [2020-10-20 06:16:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:16,208 INFO L93 Difference]: Finished difference Result 2091 states and 3209 transitions. [2020-10-20 06:16:16,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:16,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-20 06:16:16,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:16,223 INFO L225 Difference]: With dead ends: 2091 [2020-10-20 06:16:16,224 INFO L226 Difference]: Without dead ends: 2091 [2020-10-20 06:16:16,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-10-20 06:16:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-10-20 06:16:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-20 06:16:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3208 transitions. [2020-10-20 06:16:16,285 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3208 transitions. Word has length 28 [2020-10-20 06:16:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:16,285 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3208 transitions. [2020-10-20 06:16:16,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3208 transitions. [2020-10-20 06:16:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:16,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:16,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:16,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 06:16:16,289 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash -655478549, now seen corresponding path program 1 times [2020-10-20 06:16:16,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:16,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924903141] [2020-10-20 06:16:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:16,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:16,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924903141] [2020-10-20 06:16:16,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:16,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:16,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556240231] [2020-10-20 06:16:16,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:16,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:16,392 INFO L87 Difference]: Start difference. First operand 2090 states and 3208 transitions. Second operand 4 states. [2020-10-20 06:16:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:16,518 INFO L93 Difference]: Finished difference Result 2123 states and 3209 transitions. [2020-10-20 06:16:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:16,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:16,528 INFO L225 Difference]: With dead ends: 2123 [2020-10-20 06:16:16,529 INFO L226 Difference]: Without dead ends: 2123 [2020-10-20 06:16:16,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-20 06:16:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2122. [2020-10-20 06:16:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2020-10-20 06:16:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3208 transitions. [2020-10-20 06:16:16,739 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3208 transitions. Word has length 29 [2020-10-20 06:16:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:16,739 INFO L481 AbstractCegarLoop]: Abstraction has 2122 states and 3208 transitions. [2020-10-20 06:16:16,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3208 transitions. [2020-10-20 06:16:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:16,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:16,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:16,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-20 06:16:16,743 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1676546903, now seen corresponding path program 1 times [2020-10-20 06:16:16,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:16,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965307747] [2020-10-20 06:16:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:16,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:16,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965307747] [2020-10-20 06:16:16,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:16,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:16,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460795467] [2020-10-20 06:16:16,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:16,797 INFO L87 Difference]: Start difference. First operand 2122 states and 3208 transitions. Second operand 4 states. [2020-10-20 06:16:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:16,973 INFO L93 Difference]: Finished difference Result 3723 states and 5673 transitions. [2020-10-20 06:16:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:16,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:16,997 INFO L225 Difference]: With dead ends: 3723 [2020-10-20 06:16:16,998 INFO L226 Difference]: Without dead ends: 3723 [2020-10-20 06:16:16,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-10-20 06:16:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3082. [2020-10-20 06:16:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3082 states. [2020-10-20 06:16:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4520 transitions. [2020-10-20 06:16:17,154 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4520 transitions. Word has length 29 [2020-10-20 06:16:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:17,155 INFO L481 AbstractCegarLoop]: Abstraction has 3082 states and 4520 transitions. [2020-10-20 06:16:17,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4520 transitions. [2020-10-20 06:16:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:16:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:17,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:17,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-20 06:16:17,164 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1338556715, now seen corresponding path program 1 times [2020-10-20 06:16:17,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:17,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568247192] [2020-10-20 06:16:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:17,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:17,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568247192] [2020-10-20 06:16:17,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:17,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:17,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762227685] [2020-10-20 06:16:17,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:17,216 INFO L87 Difference]: Start difference. First operand 3082 states and 4520 transitions. Second operand 4 states. [2020-10-20 06:16:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:17,391 INFO L93 Difference]: Finished difference Result 4107 states and 5961 transitions. [2020-10-20 06:16:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:17,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-20 06:16:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:17,409 INFO L225 Difference]: With dead ends: 4107 [2020-10-20 06:16:17,409 INFO L226 Difference]: Without dead ends: 4107 [2020-10-20 06:16:17,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-20 06:16:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4106. [2020-10-20 06:16:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4106 states. [2020-10-20 06:16:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5960 transitions. [2020-10-20 06:16:17,498 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5960 transitions. Word has length 29 [2020-10-20 06:16:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:17,499 INFO L481 AbstractCegarLoop]: Abstraction has 4106 states and 5960 transitions. [2020-10-20 06:16:17,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5960 transitions. [2020-10-20 06:16:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:16:17,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:17,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:17,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-20 06:16:17,505 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -426685595, now seen corresponding path program 1 times [2020-10-20 06:16:17,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:17,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160160152] [2020-10-20 06:16:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:17,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160160152] [2020-10-20 06:16:17,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:17,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:17,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003738844] [2020-10-20 06:16:17,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:17,584 INFO L87 Difference]: Start difference. First operand 4106 states and 5960 transitions. Second operand 4 states. [2020-10-20 06:16:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:17,712 INFO L93 Difference]: Finished difference Result 4171 states and 5961 transitions. [2020-10-20 06:16:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:17,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:16:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:17,730 INFO L225 Difference]: With dead ends: 4171 [2020-10-20 06:16:17,730 INFO L226 Difference]: Without dead ends: 4171 [2020-10-20 06:16:17,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-10-20 06:16:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4170. [2020-10-20 06:16:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-10-20 06:16:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5960 transitions. [2020-10-20 06:16:17,821 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5960 transitions. Word has length 30 [2020-10-20 06:16:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:17,821 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 5960 transitions. [2020-10-20 06:16:17,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5960 transitions. [2020-10-20 06:16:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:16:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:17,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-20 06:16:17,827 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1447753949, now seen corresponding path program 1 times [2020-10-20 06:16:17,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:17,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106263609] [2020-10-20 06:16:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:17,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106263609] [2020-10-20 06:16:17,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:17,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:17,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680245163] [2020-10-20 06:16:17,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:17,873 INFO L87 Difference]: Start difference. First operand 4170 states and 5960 transitions. Second operand 4 states. [2020-10-20 06:16:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:18,040 INFO L93 Difference]: Finished difference Result 7179 states and 10313 transitions. [2020-10-20 06:16:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:18,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:16:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:18,054 INFO L225 Difference]: With dead ends: 7179 [2020-10-20 06:16:18,055 INFO L226 Difference]: Without dead ends: 7179 [2020-10-20 06:16:18,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2020-10-20 06:16:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6154. [2020-10-20 06:16:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-10-20 06:16:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 8520 transitions. [2020-10-20 06:16:18,168 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 8520 transitions. Word has length 30 [2020-10-20 06:16:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:18,168 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 8520 transitions. [2020-10-20 06:16:18,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 8520 transitions. [2020-10-20 06:16:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:16:18,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:18,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:18,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-20 06:16:18,180 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1567349669, now seen corresponding path program 1 times [2020-10-20 06:16:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:18,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554413956] [2020-10-20 06:16:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:18,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:18,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554413956] [2020-10-20 06:16:18,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:18,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:18,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047678537] [2020-10-20 06:16:18,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:18,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:18,480 INFO L87 Difference]: Start difference. First operand 6154 states and 8520 transitions. Second operand 4 states. [2020-10-20 06:16:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:18,627 INFO L93 Difference]: Finished difference Result 8075 states and 11017 transitions. [2020-10-20 06:16:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:18,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 06:16:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:18,646 INFO L225 Difference]: With dead ends: 8075 [2020-10-20 06:16:18,646 INFO L226 Difference]: Without dead ends: 8075 [2020-10-20 06:16:18,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2020-10-20 06:16:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8074. [2020-10-20 06:16:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8074 states. [2020-10-20 06:16:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8074 states to 8074 states and 11016 transitions. [2020-10-20 06:16:18,786 INFO L78 Accepts]: Start accepts. Automaton has 8074 states and 11016 transitions. Word has length 30 [2020-10-20 06:16:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:18,787 INFO L481 AbstractCegarLoop]: Abstraction has 8074 states and 11016 transitions. [2020-10-20 06:16:18,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 8074 states and 11016 transitions. [2020-10-20 06:16:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:16:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:18,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:18,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-20 06:16:18,797 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1924028042, now seen corresponding path program 1 times [2020-10-20 06:16:18,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:18,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091607484] [2020-10-20 06:16:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:18,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:18,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091607484] [2020-10-20 06:16:18,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:18,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:18,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969105726] [2020-10-20 06:16:18,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:18,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:18,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:18,843 INFO L87 Difference]: Start difference. First operand 8074 states and 11016 transitions. Second operand 4 states. [2020-10-20 06:16:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:19,000 INFO L93 Difference]: Finished difference Result 8203 states and 11017 transitions. [2020-10-20 06:16:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:19,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-20 06:16:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:19,017 INFO L225 Difference]: With dead ends: 8203 [2020-10-20 06:16:19,017 INFO L226 Difference]: Without dead ends: 8203 [2020-10-20 06:16:19,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-10-20 06:16:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8202. [2020-10-20 06:16:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-10-20 06:16:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11016 transitions. [2020-10-20 06:16:19,160 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11016 transitions. Word has length 31 [2020-10-20 06:16:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:19,160 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 11016 transitions. [2020-10-20 06:16:19,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11016 transitions. [2020-10-20 06:16:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:16:19,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:19,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:19,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-20 06:16:19,170 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1349870900, now seen corresponding path program 1 times [2020-10-20 06:16:19,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:19,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435197799] [2020-10-20 06:16:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:19,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:19,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435197799] [2020-10-20 06:16:19,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:19,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939757358] [2020-10-20 06:16:19,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:19,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:19,217 INFO L87 Difference]: Start difference. First operand 8202 states and 11016 transitions. Second operand 4 states. [2020-10-20 06:16:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:19,392 INFO L93 Difference]: Finished difference Result 13835 states and 18569 transitions. [2020-10-20 06:16:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:19,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-20 06:16:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:19,638 INFO L225 Difference]: With dead ends: 13835 [2020-10-20 06:16:19,639 INFO L226 Difference]: Without dead ends: 13835 [2020-10-20 06:16:19,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2020-10-20 06:16:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12298. [2020-10-20 06:16:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2020-10-20 06:16:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 16008 transitions. [2020-10-20 06:16:19,812 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 16008 transitions. Word has length 31 [2020-10-20 06:16:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:19,813 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states and 16008 transitions. [2020-10-20 06:16:19,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 16008 transitions. [2020-10-20 06:16:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:16:19,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:19,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:19,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-20 06:16:19,831 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash 70007222, now seen corresponding path program 1 times [2020-10-20 06:16:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:19,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113557811] [2020-10-20 06:16:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:19,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:19,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113557811] [2020-10-20 06:16:19,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:19,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034379264] [2020-10-20 06:16:19,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:19,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:19,874 INFO L87 Difference]: Start difference. First operand 12298 states and 16008 transitions. Second operand 4 states. [2020-10-20 06:16:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:20,075 INFO L93 Difference]: Finished difference Result 15883 states and 20233 transitions. [2020-10-20 06:16:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:20,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-20 06:16:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:20,105 INFO L225 Difference]: With dead ends: 15883 [2020-10-20 06:16:20,105 INFO L226 Difference]: Without dead ends: 15883 [2020-10-20 06:16:20,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2020-10-20 06:16:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15882. [2020-10-20 06:16:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-20 06:16:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 20232 transitions. [2020-10-20 06:16:20,344 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 20232 transitions. Word has length 31 [2020-10-20 06:16:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:20,345 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 20232 transitions. [2020-10-20 06:16:20,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 20232 transitions. [2020-10-20 06:16:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:16:20,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:20,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:20,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-20 06:16:20,365 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1096993072, now seen corresponding path program 1 times [2020-10-20 06:16:20,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:20,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538030657] [2020-10-20 06:16:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:20,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:20,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538030657] [2020-10-20 06:16:20,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:20,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:20,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338953163] [2020-10-20 06:16:20,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:20,406 INFO L87 Difference]: Start difference. First operand 15882 states and 20232 transitions. Second operand 4 states. [2020-10-20 06:16:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:20,604 INFO L93 Difference]: Finished difference Result 16139 states and 20233 transitions. [2020-10-20 06:16:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:20,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-20 06:16:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:20,636 INFO L225 Difference]: With dead ends: 16139 [2020-10-20 06:16:20,636 INFO L226 Difference]: Without dead ends: 16139 [2020-10-20 06:16:20,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:20,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-20 06:16:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-10-20 06:16:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-10-20 06:16:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20232 transitions. [2020-10-20 06:16:21,166 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20232 transitions. Word has length 32 [2020-10-20 06:16:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:21,167 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20232 transitions. [2020-10-20 06:16:21,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20232 transitions. [2020-10-20 06:16:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:16:21,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:21,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:21,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-20 06:16:21,184 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2118061426, now seen corresponding path program 1 times [2020-10-20 06:16:21,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:21,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570848952] [2020-10-20 06:16:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:21,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570848952] [2020-10-20 06:16:21,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:21,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:21,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076230933] [2020-10-20 06:16:21,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:21,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:21,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:21,239 INFO L87 Difference]: Start difference. First operand 16138 states and 20232 transitions. Second operand 4 states. [2020-10-20 06:16:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:21,500 INFO L93 Difference]: Finished difference Result 31243 states and 37385 transitions. [2020-10-20 06:16:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:21,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-20 06:16:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:21,547 INFO L225 Difference]: With dead ends: 31243 [2020-10-20 06:16:21,547 INFO L226 Difference]: Without dead ends: 31243 [2020-10-20 06:16:21,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2020-10-20 06:16:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31242. [2020-10-20 06:16:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-20 06:16:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 37384 transitions. [2020-10-20 06:16:22,325 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 37384 transitions. Word has length 32 [2020-10-20 06:16:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:22,326 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 37384 transitions. [2020-10-20 06:16:22,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 37384 transitions. [2020-10-20 06:16:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:16:22,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:22,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:22,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-20 06:16:22,357 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash -838197748, now seen corresponding path program 1 times [2020-10-20 06:16:22,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:22,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713333804] [2020-10-20 06:16:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:22,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:22,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713333804] [2020-10-20 06:16:22,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:22,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:22,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926543559] [2020-10-20 06:16:22,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:22,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:22,419 INFO L87 Difference]: Start difference. First operand 31242 states and 37384 transitions. Second operand 4 states. [2020-10-20 06:16:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:22,694 INFO L93 Difference]: Finished difference Result 33291 states and 39945 transitions. [2020-10-20 06:16:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:22,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-20 06:16:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:22,719 INFO L225 Difference]: With dead ends: 33291 [2020-10-20 06:16:22,719 INFO L226 Difference]: Without dead ends: 33291 [2020-10-20 06:16:22,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2020-10-20 06:16:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31242. [2020-10-20 06:16:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-20 06:16:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 36872 transitions. [2020-10-20 06:16:23,595 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 36872 transitions. Word has length 32 [2020-10-20 06:16:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:23,596 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 36872 transitions. [2020-10-20 06:16:23,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 36872 transitions. [2020-10-20 06:16:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 06:16:23,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:23,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:23,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-20 06:16:23,618 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1228702207, now seen corresponding path program 1 times [2020-10-20 06:16:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:23,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033538602] [2020-10-20 06:16:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:23,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:23,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033538602] [2020-10-20 06:16:23,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:23,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:23,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560549469] [2020-10-20 06:16:23,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:23,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:23,666 INFO L87 Difference]: Start difference. First operand 31242 states and 36872 transitions. Second operand 4 states. [2020-10-20 06:16:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:23,979 INFO L93 Difference]: Finished difference Result 50698 states and 58376 transitions. [2020-10-20 06:16:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:23,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-20 06:16:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:24,034 INFO L225 Difference]: With dead ends: 50698 [2020-10-20 06:16:24,035 INFO L226 Difference]: Without dead ends: 50698 [2020-10-20 06:16:24,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2020-10-20 06:16:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 48650. [2020-10-20 06:16:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48650 states. [2020-10-20 06:16:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48650 states to 48650 states and 56328 transitions. [2020-10-20 06:16:25,211 INFO L78 Accepts]: Start accepts. Automaton has 48650 states and 56328 transitions. Word has length 33 [2020-10-20 06:16:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:25,211 INFO L481 AbstractCegarLoop]: Abstraction has 48650 states and 56328 transitions. [2020-10-20 06:16:25,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 48650 states and 56328 transitions. [2020-10-20 06:16:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 06:16:25,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:16:25,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:16:25,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-20 06:16:25,239 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 06:16:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:16:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1786401411, now seen corresponding path program 1 times [2020-10-20 06:16:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:16:25,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416087601] [2020-10-20 06:16:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:16:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:16:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:16:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:16:25,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416087601] [2020-10-20 06:16:25,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:16:25,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:16:25,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422218257] [2020-10-20 06:16:25,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:16:25,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:16:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:16:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:16:25,298 INFO L87 Difference]: Start difference. First operand 48650 states and 56328 transitions. Second operand 4 states. [2020-10-20 06:16:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:16:26,296 INFO L93 Difference]: Finished difference Result 60935 states and 67590 transitions. [2020-10-20 06:16:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:16:26,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-20 06:16:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:16:26,297 INFO L225 Difference]: With dead ends: 60935 [2020-10-20 06:16:26,297 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:16:26,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:16:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:16:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:16:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:16:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:16:26,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-10-20 06:16:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:16:26,299 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:16:26,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:16:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:16:26,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:16:26,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-20 06:16:26,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:16:26 BoogieIcfgContainer [2020-10-20 06:16:26,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:16:26,306 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:16:26,306 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:16:26,306 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:16:26,307 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:16:11" (3/4) ... [2020-10-20 06:16:26,324 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:16:26,334 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-20 06:16:26,334 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:16:26,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:16:26,348 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:16:26,349 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 06:16:26,349 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:16:26,350 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:16:26,435 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:16:26,435 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:16:26,437 INFO L168 Benchmark]: Toolchain (without parser) took 15895.05 ms. Allocated memory was 41.4 MB in the beginning and 384.3 MB in the end (delta: 342.9 MB). Free memory was 19.2 MB in the beginning and 252.8 MB in the end (delta: -233.6 MB). Peak memory consumption was 109.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,438 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 31.5 MB. Free memory was 9.0 MB in the beginning and 8.9 MB in the end (delta: 43.8 kB). Peak memory consumption was 43.8 kB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.70 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 18.3 MB in the beginning and 16.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,439 INFO L168 Benchmark]: Boogie Preprocessor took 66.51 ms. Allocated memory is still 41.9 MB. Free memory was 16.4 MB in the beginning and 14.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,439 INFO L168 Benchmark]: RCFGBuilder took 450.67 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 14.4 MB in the beginning and 23.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,440 INFO L168 Benchmark]: TraceAbstraction took 14923.82 ms. Allocated memory was 43.5 MB in the beginning and 384.3 MB in the end (delta: 340.8 MB). Free memory was 23.4 MB in the beginning and 257.9 MB in the end (delta: -234.5 MB). Peak memory consumption was 106.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,441 INFO L168 Benchmark]: Witness Printer took 129.21 ms. Allocated memory is still 384.3 MB. Free memory was 257.9 MB in the beginning and 252.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:16:26,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 31.5 MB. Free memory was 9.0 MB in the beginning and 8.9 MB in the end (delta: 43.8 kB). Peak memory consumption was 43.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 309.70 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 18.3 MB in the beginning and 16.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 66.51 ms. Allocated memory is still 41.9 MB. Free memory was 16.4 MB in the beginning and 14.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * RCFGBuilder took 450.67 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 14.4 MB in the beginning and 23.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 14923.82 ms. Allocated memory was 43.5 MB in the beginning and 384.3 MB in the end (delta: 340.8 MB). Free memory was 23.4 MB in the beginning and 257.9 MB in the end (delta: -234.5 MB). Peak memory consumption was 106.3 MB. Max. memory is 14.3 GB. * Witness Printer took 129.21 ms. Allocated memory is still 384.3 MB. Free memory was 257.9 MB in the beginning and 252.8 MB in the end (delta: 5.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.8s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2900 SDtfs, 4219 SDslu, 232 SDs, 0 SdLazy, 2029 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48650occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 8194 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 852 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 821 ConstructedInterpolants, 0 QuantifiedInterpolants, 67886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...