./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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_6.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 8a6bc1adbcafb13db44c5d4b4826990150e2f336 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:48,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:48,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:48,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:48,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:48,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:48,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:48,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:48,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:48,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:48,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:48,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:48,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:48,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:48,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:48,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:48,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:48,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:48,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:48,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:48,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:48,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:48,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:48,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:48,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:48,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:48,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:48,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:48,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:48,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:48,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:48,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:48,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:48,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:48,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:48,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:48,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:48,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:48,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:48,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:48,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:48,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:48,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:48,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:48,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:48,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:48,728 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:48,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:48,728 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:48,728 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:48,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:48,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:48,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:48,730 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:48,730 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:48,730 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:48,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:48,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:48,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:48,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:48,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:48,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:48,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:48,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:48,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:48,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:48,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:48,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:48,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:48,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:48,735 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 -> 8a6bc1adbcafb13db44c5d4b4826990150e2f336 [2020-10-19 18:23:49,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:49,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:49,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:49,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:49,109 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:49,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_6.c [2020-10-19 18:23:49,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7000c67c0/d2269c8f159c478f81e617411a96e1fd/FLAG3323b5e52 [2020-10-19 18:23:49,606 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:49,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c [2020-10-19 18:23:49,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7000c67c0/d2269c8f159c478f81e617411a96e1fd/FLAG3323b5e52 [2020-10-19 18:23:49,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7000c67c0/d2269c8f159c478f81e617411a96e1fd [2020-10-19 18:23:49,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:49,970 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:49,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:49,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:49,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:49,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:49" (1/1) ... [2020-10-19 18:23:49,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a618061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:49, skipping insertion in model container [2020-10-19 18:23:49,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:49" (1/1) ... [2020-10-19 18:23:49,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:50,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:50,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:50,246 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:50,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:50,310 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:50,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50 WrapperNode [2020-10-19 18:23:50,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:50,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:50,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:50,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:50,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... [2020-10-19 18:23:50,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:50,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:50,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:50,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:50,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:50,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:50,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:50,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:50,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:50,851 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:50,851 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:50,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:50 BoogieIcfgContainer [2020-10-19 18:23:50,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:50,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:50,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:50,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:50,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:49" (1/3) ... [2020-10-19 18:23:50,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73153281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:50, skipping insertion in model container [2020-10-19 18:23:50,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:50" (2/3) ... [2020-10-19 18:23:50,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73153281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:50, skipping insertion in model container [2020-10-19 18:23:50,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:50" (3/3) ... [2020-10-19 18:23:50,867 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-19 18:23:50,884 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:50,894 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:50,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:50,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:50,941 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:50,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:50,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:50,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:50,942 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:50,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:50,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-19 18:23:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:50,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:51,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:51,001 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:51,017 INFO L82 PathProgramCache]: Analyzing trace with hash -214899584, now seen corresponding path program 1 times [2020-10-19 18:23:51,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:51,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720869736] [2020-10-19 18:23:51,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:51,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:51,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720869736] [2020-10-19 18:23:51,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:51,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:51,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188858462] [2020-10-19 18:23:51,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:51,317 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-19 18:23:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:51,365 INFO L93 Difference]: Finished difference Result 34 states and 51 transitions. [2020-10-19 18:23:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:51,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:51,380 INFO L225 Difference]: With dead ends: 34 [2020-10-19 18:23:51,380 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 18:23:51,383 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 [2020-10-19 18:23:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 18:23:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-19 18:23:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:23:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2020-10-19 18:23:51,424 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 9 [2020-10-19 18:23:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:51,425 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 46 transitions. [2020-10-19 18:23:51,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 46 transitions. [2020-10-19 18:23:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:23:51,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:51,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:51,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:51,427 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2113178603, now seen corresponding path program 1 times [2020-10-19 18:23:51,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:51,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943827662] [2020-10-19 18:23:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:51,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:51,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943827662] [2020-10-19 18:23:51,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:51,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431000394] [2020-10-19 18:23:51,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:51,556 INFO L87 Difference]: Start difference. First operand 29 states and 46 transitions. Second operand 4 states. [2020-10-19 18:23:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:51,697 INFO L93 Difference]: Finished difference Result 49 states and 82 transitions. [2020-10-19 18:23:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:51,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-19 18:23:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:51,700 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:23:51,700 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:23:51,701 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 [2020-10-19 18:23:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:23:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-19 18:23:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 18:23:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-19 18:23:51,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-19 18:23:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:51,711 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-19 18:23:51,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-19 18:23:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:23:51,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:51,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:51,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:51,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1788761683, now seen corresponding path program 1 times [2020-10-19 18:23:51,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:51,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52495652] [2020-10-19 18:23:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:51,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:51,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52495652] [2020-10-19 18:23:51,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:51,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:51,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293871491] [2020-10-19 18:23:51,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:51,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:51,839 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-19 18:23:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:51,995 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2020-10-19 18:23:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:51,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-19 18:23:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:51,998 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:23:51,998 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 18:23:51,998 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 [2020-10-19 18:23:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 18:23:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-19 18:23:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-19 18:23:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-19 18:23:52,007 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-19 18:23:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:52,007 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-19 18:23:52,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-19 18:23:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:52,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:52,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:52,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:52,010 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:52,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1077379613, now seen corresponding path program 1 times [2020-10-19 18:23:52,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:52,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639336423] [2020-10-19 18:23:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:52,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639336423] [2020-10-19 18:23:52,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:52,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:52,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915375227] [2020-10-19 18:23:52,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:52,116 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-19 18:23:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:52,254 INFO L93 Difference]: Finished difference Result 52 states and 82 transitions. [2020-10-19 18:23:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:52,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:52,257 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:23:52,257 INFO L226 Difference]: Without dead ends: 52 [2020-10-19 18:23:52,258 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 [2020-10-19 18:23:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-19 18:23:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-19 18:23:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-19 18:23:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2020-10-19 18:23:52,267 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 19 [2020-10-19 18:23:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:52,268 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2020-10-19 18:23:52,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2020-10-19 18:23:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:52,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:52,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:52,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:52,271 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash -376315035, now seen corresponding path program 1 times [2020-10-19 18:23:52,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:52,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406641757] [2020-10-19 18:23:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:52,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406641757] [2020-10-19 18:23:52,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:52,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:52,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893425003] [2020-10-19 18:23:52,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:52,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:52,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:52,375 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand 4 states. [2020-10-19 18:23:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:52,522 INFO L93 Difference]: Finished difference Result 89 states and 143 transitions. [2020-10-19 18:23:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:52,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:52,525 INFO L225 Difference]: With dead ends: 89 [2020-10-19 18:23:52,525 INFO L226 Difference]: Without dead ends: 89 [2020-10-19 18:23:52,526 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 [2020-10-19 18:23:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-19 18:23:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-19 18:23:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 18:23:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 142 transitions. [2020-10-19 18:23:52,537 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 142 transitions. Word has length 19 [2020-10-19 18:23:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:52,537 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 142 transitions. [2020-10-19 18:23:52,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 142 transitions. [2020-10-19 18:23:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:23:52,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:52,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:52,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:52,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash 16711975, now seen corresponding path program 1 times [2020-10-19 18:23:52,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:52,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669438166] [2020-10-19 18:23:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:52,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669438166] [2020-10-19 18:23:52,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:52,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:52,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094846093] [2020-10-19 18:23:52,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:52,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:52,615 INFO L87 Difference]: Start difference. First operand 88 states and 142 transitions. Second operand 4 states. [2020-10-19 18:23:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:52,728 INFO L93 Difference]: Finished difference Result 109 states and 177 transitions. [2020-10-19 18:23:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:52,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 18:23:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:52,730 INFO L225 Difference]: With dead ends: 109 [2020-10-19 18:23:52,731 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 18:23:52,731 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 [2020-10-19 18:23:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 18:23:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2020-10-19 18:23:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 18:23:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2020-10-19 18:23:52,741 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 19 [2020-10-19 18:23:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:52,742 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2020-10-19 18:23:52,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2020-10-19 18:23:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:52,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:52,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:52,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:52,745 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1225794014, now seen corresponding path program 1 times [2020-10-19 18:23:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:52,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828866899] [2020-10-19 18:23:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:52,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828866899] [2020-10-19 18:23:52,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:52,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:52,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198773863] [2020-10-19 18:23:52,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:52,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:52,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:52,832 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand 4 states. [2020-10-19 18:23:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:52,938 INFO L93 Difference]: Finished difference Result 153 states and 247 transitions. [2020-10-19 18:23:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:52,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:52,940 INFO L225 Difference]: With dead ends: 153 [2020-10-19 18:23:52,941 INFO L226 Difference]: Without dead ends: 153 [2020-10-19 18:23:52,941 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 [2020-10-19 18:23:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-19 18:23:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-10-19 18:23:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-19 18:23:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-10-19 18:23:52,953 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 20 [2020-10-19 18:23:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:52,954 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-10-19 18:23:52,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-10-19 18:23:52,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:52,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:52,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:52,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:52,957 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:52,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:52,957 INFO L82 PathProgramCache]: Analyzing trace with hash 832767004, now seen corresponding path program 1 times [2020-10-19 18:23:52,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:52,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544451595] [2020-10-19 18:23:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:53,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544451595] [2020-10-19 18:23:53,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:53,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:53,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401400055] [2020-10-19 18:23:53,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:53,051 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 4 states. [2020-10-19 18:23:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:53,164 INFO L93 Difference]: Finished difference Result 161 states and 249 transitions. [2020-10-19 18:23:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:53,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:53,167 INFO L225 Difference]: With dead ends: 161 [2020-10-19 18:23:53,167 INFO L226 Difference]: Without dead ends: 161 [2020-10-19 18:23:53,167 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 [2020-10-19 18:23:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-19 18:23:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-19 18:23:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-19 18:23:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2020-10-19 18:23:53,195 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 20 [2020-10-19 18:23:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:53,195 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2020-10-19 18:23:53,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2020-10-19 18:23:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:53,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:53,200 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] [2020-10-19 18:23:53,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:53,203 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:53,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash -648422448, now seen corresponding path program 1 times [2020-10-19 18:23:53,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:53,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563675356] [2020-10-19 18:23:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:53,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563675356] [2020-10-19 18:23:53,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:53,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:53,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079710586] [2020-10-19 18:23:53,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:53,278 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand 4 states. [2020-10-19 18:23:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:53,385 INFO L93 Difference]: Finished difference Result 167 states and 253 transitions. [2020-10-19 18:23:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:53,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:53,386 INFO L225 Difference]: With dead ends: 167 [2020-10-19 18:23:53,387 INFO L226 Difference]: Without dead ends: 167 [2020-10-19 18:23:53,387 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 [2020-10-19 18:23:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-19 18:23:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-19 18:23:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-19 18:23:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 252 transitions. [2020-10-19 18:23:53,394 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 252 transitions. Word has length 21 [2020-10-19 18:23:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:53,395 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 252 transitions. [2020-10-19 18:23:53,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 252 transitions. [2020-10-19 18:23:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:53,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:53,396 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] [2020-10-19 18:23:53,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:53,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash 52642130, now seen corresponding path program 1 times [2020-10-19 18:23:53,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:53,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659455736] [2020-10-19 18:23:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:53,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659455736] [2020-10-19 18:23:53,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:53,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738311923] [2020-10-19 18:23:53,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:53,447 INFO L87 Difference]: Start difference. First operand 166 states and 252 transitions. Second operand 4 states. [2020-10-19 18:23:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:53,546 INFO L93 Difference]: Finished difference Result 283 states and 429 transitions. [2020-10-19 18:23:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:53,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:53,549 INFO L225 Difference]: With dead ends: 283 [2020-10-19 18:23:53,549 INFO L226 Difference]: Without dead ends: 283 [2020-10-19 18:23:53,549 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 [2020-10-19 18:23:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-19 18:23:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 234. [2020-10-19 18:23:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-19 18:23:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 348 transitions. [2020-10-19 18:23:53,558 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 348 transitions. Word has length 21 [2020-10-19 18:23:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:53,559 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 348 transitions. [2020-10-19 18:23:53,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 348 transitions. [2020-10-19 18:23:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:53,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:53,561 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] [2020-10-19 18:23:53,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:53,561 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:53,562 INFO L82 PathProgramCache]: Analyzing trace with hash -340384880, now seen corresponding path program 1 times [2020-10-19 18:23:53,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:53,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690932526] [2020-10-19 18:23:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690932526] [2020-10-19 18:23:53,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:53,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:53,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238350767] [2020-10-19 18:23:53,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:53,611 INFO L87 Difference]: Start difference. First operand 234 states and 348 transitions. Second operand 4 states. [2020-10-19 18:23:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:53,733 INFO L93 Difference]: Finished difference Result 307 states and 441 transitions. [2020-10-19 18:23:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:53,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:53,736 INFO L225 Difference]: With dead ends: 307 [2020-10-19 18:23:53,736 INFO L226 Difference]: Without dead ends: 307 [2020-10-19 18:23:53,739 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 [2020-10-19 18:23:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-19 18:23:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-19 18:23:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-19 18:23:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 440 transitions. [2020-10-19 18:23:53,751 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 440 transitions. Word has length 21 [2020-10-19 18:23:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:53,751 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 440 transitions. [2020-10-19 18:23:53,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 440 transitions. [2020-10-19 18:23:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:53,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:53,756 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] [2020-10-19 18:23:53,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:53,757 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:53,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:53,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1638585383, now seen corresponding path program 1 times [2020-10-19 18:23:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:53,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12595828] [2020-10-19 18:23:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:53,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12595828] [2020-10-19 18:23:53,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:53,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:53,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793532775] [2020-10-19 18:23:53,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:53,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:53,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:53,848 INFO L87 Difference]: Start difference. First operand 306 states and 440 transitions. Second operand 4 states. [2020-10-19 18:23:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:53,958 INFO L93 Difference]: Finished difference Result 315 states and 441 transitions. [2020-10-19 18:23:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:53,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:53,964 INFO L225 Difference]: With dead ends: 315 [2020-10-19 18:23:53,964 INFO L226 Difference]: Without dead ends: 315 [2020-10-19 18:23:53,964 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 [2020-10-19 18:23:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-19 18:23:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-10-19 18:23:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-19 18:23:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 440 transitions. [2020-10-19 18:23:53,975 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 440 transitions. Word has length 22 [2020-10-19 18:23:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:53,976 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 440 transitions. [2020-10-19 18:23:53,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 440 transitions. [2020-10-19 18:23:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:53,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:53,978 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] [2020-10-19 18:23:53,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:53,979 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1955317335, now seen corresponding path program 1 times [2020-10-19 18:23:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:53,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596204083] [2020-10-19 18:23:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:54,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596204083] [2020-10-19 18:23:54,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:54,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:54,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933750613] [2020-10-19 18:23:54,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:54,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:54,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:54,058 INFO L87 Difference]: Start difference. First operand 314 states and 440 transitions. Second operand 4 states. [2020-10-19 18:23:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:54,151 INFO L93 Difference]: Finished difference Result 523 states and 721 transitions. [2020-10-19 18:23:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:54,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:54,155 INFO L225 Difference]: With dead ends: 523 [2020-10-19 18:23:54,156 INFO L226 Difference]: Without dead ends: 523 [2020-10-19 18:23:54,157 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 [2020-10-19 18:23:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-19 18:23:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 458. [2020-10-19 18:23:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-19 18:23:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 624 transitions. [2020-10-19 18:23:54,170 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 624 transitions. Word has length 22 [2020-10-19 18:23:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:54,170 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 624 transitions. [2020-10-19 18:23:54,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 624 transitions. [2020-10-19 18:23:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:54,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:54,173 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] [2020-10-19 18:23:54,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:54,173 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1946622951, now seen corresponding path program 1 times [2020-10-19 18:23:54,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:54,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656332800] [2020-10-19 18:23:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:54,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656332800] [2020-10-19 18:23:54,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:54,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:54,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260004585] [2020-10-19 18:23:54,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:54,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:54,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:54,245 INFO L87 Difference]: Start difference. First operand 458 states and 624 transitions. Second operand 4 states. [2020-10-19 18:23:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:54,346 INFO L93 Difference]: Finished difference Result 587 states and 761 transitions. [2020-10-19 18:23:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:54,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:54,350 INFO L225 Difference]: With dead ends: 587 [2020-10-19 18:23:54,350 INFO L226 Difference]: Without dead ends: 587 [2020-10-19 18:23:54,351 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 [2020-10-19 18:23:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-19 18:23:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 586. [2020-10-19 18:23:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-19 18:23:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2020-10-19 18:23:54,367 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 22 [2020-10-19 18:23:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:54,367 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2020-10-19 18:23:54,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2020-10-19 18:23:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:54,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:54,369 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] [2020-10-19 18:23:54,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:54,370 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:54,371 INFO L82 PathProgramCache]: Analyzing trace with hash -478605317, now seen corresponding path program 1 times [2020-10-19 18:23:54,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:54,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380684505] [2020-10-19 18:23:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:54,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380684505] [2020-10-19 18:23:54,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:54,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58674314] [2020-10-19 18:23:54,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:54,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:54,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:54,440 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand 4 states. [2020-10-19 18:23:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:54,524 INFO L93 Difference]: Finished difference Result 603 states and 761 transitions. [2020-10-19 18:23:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:54,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:54,528 INFO L225 Difference]: With dead ends: 603 [2020-10-19 18:23:54,528 INFO L226 Difference]: Without dead ends: 603 [2020-10-19 18:23:54,528 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 [2020-10-19 18:23:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-19 18:23:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-19 18:23:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-19 18:23:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 760 transitions. [2020-10-19 18:23:54,543 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 760 transitions. Word has length 23 [2020-10-19 18:23:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:54,544 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 760 transitions. [2020-10-19 18:23:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 760 transitions. [2020-10-19 18:23:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:54,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:54,545 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] [2020-10-19 18:23:54,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:23:54,546 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash 222459261, now seen corresponding path program 1 times [2020-10-19 18:23:54,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:54,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732366635] [2020-10-19 18:23:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:54,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732366635] [2020-10-19 18:23:54,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:54,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:54,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449950439] [2020-10-19 18:23:54,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:54,590 INFO L87 Difference]: Start difference. First operand 602 states and 760 transitions. Second operand 4 states. [2020-10-19 18:23:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:54,679 INFO L93 Difference]: Finished difference Result 970 states and 1176 transitions. [2020-10-19 18:23:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:54,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:54,684 INFO L225 Difference]: With dead ends: 970 [2020-10-19 18:23:54,684 INFO L226 Difference]: Without dead ends: 970 [2020-10-19 18:23:54,685 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 [2020-10-19 18:23:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-19 18:23:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 906. [2020-10-19 18:23:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-19 18:23:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1112 transitions. [2020-10-19 18:23:54,706 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1112 transitions. Word has length 23 [2020-10-19 18:23:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:54,706 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1112 transitions. [2020-10-19 18:23:54,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1112 transitions. [2020-10-19 18:23:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:54,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:54,708 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] [2020-10-19 18:23:54,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:23:54,709 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash -170567749, now seen corresponding path program 1 times [2020-10-19 18:23:54,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:54,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434507721] [2020-10-19 18:23:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434507721] [2020-10-19 18:23:54,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:54,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576228660] [2020-10-19 18:23:54,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:54,750 INFO L87 Difference]: Start difference. First operand 906 states and 1112 transitions. Second operand 4 states. [2020-10-19 18:23:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:54,833 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2020-10-19 18:23:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:54,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:54,834 INFO L225 Difference]: With dead ends: 1127 [2020-10-19 18:23:54,834 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:23:54,835 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 [2020-10-19 18:23:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:23:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:23:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:23:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:23:54,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-19 18:23:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:54,836 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:23:54,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:23:54,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:23:54,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:23:54,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:23:54 BoogieIcfgContainer [2020-10-19 18:23:54,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:23:54,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:23:54,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:23:54,842 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:23:54,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:50" (3/4) ... [2020-10-19 18:23:54,846 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:23:54,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:23:54,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:23:54,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:23:54,861 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:23:54,861 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:23:54,862 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:23:54,862 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:23:54,930 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:23:54,930 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:23:54,932 INFO L168 Benchmark]: Toolchain (without parser) took 4967.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 960.0 MB in the beginning and 974.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 162.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:54,933 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:54,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.99 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:54,934 INFO L168 Benchmark]: Boogie Preprocessor took 174.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -140.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:54,934 INFO L168 Benchmark]: RCFGBuilder took 369.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:54,935 INFO L168 Benchmark]: TraceAbstraction took 3985.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.0 MB). Free memory was 1.1 GB in the beginning and 982.4 MB in the end (delta: 86.4 MB). Peak memory consumption was 162.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:54,936 INFO L168 Benchmark]: Witness Printer took 87.93 ms. Allocated memory is still 1.2 GB. Free memory was 982.4 MB in the beginning and 974.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:54,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 339.99 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 174.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.2 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -140.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 369.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3985.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.0 MB). Free memory was 1.1 GB in the beginning and 982.4 MB in the end (delta: 86.4 MB). Peak memory consumption was 162.4 MB. Max. memory is 11.5 GB. * Witness Printer took 87.93 ms. Allocated memory is still 1.2 GB. Free memory was 982.4 MB in the beginning and 974.2 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 11.5 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, 38 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 934 SDtfs, 1243 SDslu, 124 SDs, 0 SdLazy, 642 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 254 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 323 ConstructedInterpolants, 0 QuantifiedInterpolants, 20501 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...