./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_8.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_8.c -s /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer --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 37d0ed05d77a0379c9ed98058bf2f327252773ce ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:47:39,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:47:39,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:47:39,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:47:39,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:47:39,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:47:39,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:47:39,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:47:39,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:47:39,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:47:39,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:47:39,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:47:39,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:47:39,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:47:39,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:47:39,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:47:39,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:47:39,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:47:39,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:47:39,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:47:39,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:47:39,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:47:39,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:47:39,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:47:39,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:47:39,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:47:39,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:47:39,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:47:39,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:47:39,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:47:39,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:47:39,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:47:39,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:47:39,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:47:39,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:47:39,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:47:39,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:47:39,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:47:39,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:47:39,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:47:39,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:47:39,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 19:47:39,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:47:39,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:47:39,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:47:39,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:47:39,643 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:47:39,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:47:39,644 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:47:39,644 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:47:39,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:47:39,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:47:39,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:47:39,647 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 19:47:39,647 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 19:47:39,647 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 19:47:39,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:47:39,648 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 19:47:39,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:47:39,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:47:39,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:47:39,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:47:39,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:47:39,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:47:39,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:47:39,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:47:39,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:47:39,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:47:39,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:47:39,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:47:39,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37d0ed05d77a0379c9ed98058bf2f327252773ce [2020-11-29 19:47:39,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:47:39,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:47:40,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:47:40,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:47:40,007 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:47:40,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/../../sv-benchmarks/c/locks/test_locks_8.c [2020-11-29 19:47:40,094 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/data/63b042d72/aad25d9dde2040b08a7b09affbfd1f86/FLAG25cb29f53 [2020-11-29 19:47:40,622 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:47:40,623 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/sv-benchmarks/c/locks/test_locks_8.c [2020-11-29 19:47:40,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/data/63b042d72/aad25d9dde2040b08a7b09affbfd1f86/FLAG25cb29f53 [2020-11-29 19:47:40,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/data/63b042d72/aad25d9dde2040b08a7b09affbfd1f86 [2020-11-29 19:47:40,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:47:41,000 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 19:47:41,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:47:41,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:47:41,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:47:41,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:47:40" (1/1) ... [2020-11-29 19:47:41,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a68fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41, skipping insertion in model container [2020-11-29 19:47:41,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:47:40" (1/1) ... [2020-11-29 19:47:41,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:47:41,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:47:41,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:47:41,343 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:47:41,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:47:41,411 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:47:41,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41 WrapperNode [2020-11-29 19:47:41,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:47:41,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:47:41,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:47:41,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:47:41,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... [2020-11-29 19:47:41,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:47:41,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:47:41,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:47:41,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:47:41,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/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 [2020-11-29 19:47:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 19:47:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:47:41,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 19:47:41,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 19:47:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 19:47:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 19:47:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 19:47:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:47:41,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 19:47:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 19:47:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 19:47:41,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:47:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:47:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:47:41,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:47:41,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:47:41,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:47:41,962 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-29 19:47:41,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:47:41 BoogieIcfgContainer [2020-11-29 19:47:41,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:47:41,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:47:41,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:47:41,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:47:41,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:47:40" (1/3) ... [2020-11-29 19:47:41,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fcef101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:47:41, skipping insertion in model container [2020-11-29 19:47:41,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:47:41" (2/3) ... [2020-11-29 19:47:41,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fcef101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:47:41, skipping insertion in model container [2020-11-29 19:47:41,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:47:41" (3/3) ... [2020-11-29 19:47:41,992 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-11-29 19:47:42,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:47:42,027 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 19:47:42,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 19:47:42,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:47:42,067 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 19:47:42,068 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:47:42,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:47:42,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:47:42,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:47:42,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:47:42,069 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:47:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-29 19:47:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:47:42,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:42,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:42,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:42,114 INFO L82 PathProgramCache]: Analyzing trace with hash -533984572, now seen corresponding path program 1 times [2020-11-29 19:47:42,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:42,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767391686] [2020-11-29 19:47:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:42,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:42,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767391686] [2020-11-29 19:47:42,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:42,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:47:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220307282] [2020-11-29 19:47:42,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:47:42,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:47:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:47:42,518 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-11-29 19:47:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:42,571 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2020-11-29 19:47:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:47:42,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 19:47:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:42,598 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:47:42,599 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 19:47:42,602 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 [2020-11-29 19:47:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 19:47:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-29 19:47:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 19:47:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2020-11-29 19:47:42,664 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 9 [2020-11-29 19:47:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:42,665 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2020-11-29 19:47:42,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:47:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2020-11-29 19:47:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:47:42,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:42,668 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] [2020-11-29 19:47:42,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:47:42,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1669689353, now seen corresponding path program 1 times [2020-11-29 19:47:42,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:42,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392015058] [2020-11-29 19:47:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392015058] [2020-11-29 19:47:42,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:42,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575537653] [2020-11-29 19:47:42,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:42,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:42,904 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2020-11-29 19:47:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:43,234 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2020-11-29 19:47:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:43,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 19:47:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:43,237 INFO L225 Difference]: With dead ends: 61 [2020-11-29 19:47:43,237 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 19:47:43,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:47:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 19:47:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-11-29 19:47:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 19:47:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 75 transitions. [2020-11-29 19:47:43,249 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 75 transitions. Word has length 20 [2020-11-29 19:47:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:43,250 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 75 transitions. [2020-11-29 19:47:43,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 75 transitions. [2020-11-29 19:47:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:47:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:43,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:43,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:47:43,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1411523915, now seen corresponding path program 1 times [2020-11-29 19:47:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:43,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99861330] [2020-11-29 19:47:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:43,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99861330] [2020-11-29 19:47:43,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:43,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774517601] [2020-11-29 19:47:43,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:43,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:43,417 INFO L87 Difference]: Start difference. First operand 44 states and 75 transitions. Second operand 4 states. [2020-11-29 19:47:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:43,684 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2020-11-29 19:47:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:43,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 19:47:43,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:43,687 INFO L225 Difference]: With dead ends: 61 [2020-11-29 19:47:43,687 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 19:47:43,688 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 [2020-11-29 19:47:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 19:47:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-11-29 19:47:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 19:47:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 103 transitions. [2020-11-29 19:47:43,705 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 103 transitions. Word has length 20 [2020-11-29 19:47:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:43,707 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 103 transitions. [2020-11-29 19:47:43,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 103 transitions. [2020-11-29 19:47:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:47:43,711 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:43,711 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] [2020-11-29 19:47:43,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:47:43,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:43,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -214134839, now seen corresponding path program 1 times [2020-11-29 19:47:43,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:43,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384111934] [2020-11-29 19:47:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:43,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:43,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384111934] [2020-11-29 19:47:43,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:43,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:43,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987473084] [2020-11-29 19:47:43,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:43,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:43,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:43,839 INFO L87 Difference]: Start difference. First operand 60 states and 103 transitions. Second operand 4 states. [2020-11-29 19:47:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:44,026 INFO L93 Difference]: Finished difference Result 64 states and 106 transitions. [2020-11-29 19:47:44,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:44,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 19:47:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:44,028 INFO L225 Difference]: With dead ends: 64 [2020-11-29 19:47:44,028 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 19:47:44,029 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 [2020-11-29 19:47:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 19:47:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-11-29 19:47:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 19:47:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2020-11-29 19:47:44,049 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 21 [2020-11-29 19:47:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:44,051 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2020-11-29 19:47:44,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2020-11-29 19:47:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:47:44,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:44,054 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] [2020-11-29 19:47:44,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:47:44,054 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash -800940853, now seen corresponding path program 1 times [2020-11-29 19:47:44,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:44,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445746917] [2020-11-29 19:47:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:44,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:44,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445746917] [2020-11-29 19:47:44,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:44,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315888597] [2020-11-29 19:47:44,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:44,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:44,179 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand 4 states. [2020-11-29 19:47:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:44,384 INFO L93 Difference]: Finished difference Result 113 states and 191 transitions. [2020-11-29 19:47:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:44,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 19:47:44,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:44,387 INFO L225 Difference]: With dead ends: 113 [2020-11-29 19:47:44,387 INFO L226 Difference]: Without dead ends: 113 [2020-11-29 19:47:44,388 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 [2020-11-29 19:47:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-29 19:47:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-11-29 19:47:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 19:47:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 190 transitions. [2020-11-29 19:47:44,409 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 190 transitions. Word has length 21 [2020-11-29 19:47:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:44,409 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 190 transitions. [2020-11-29 19:47:44,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 190 transitions. [2020-11-29 19:47:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:47:44,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:44,414 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] [2020-11-29 19:47:44,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:47:44,414 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1059106291, now seen corresponding path program 1 times [2020-11-29 19:47:44,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:44,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470442818] [2020-11-29 19:47:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:44,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:44,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470442818] [2020-11-29 19:47:44,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:44,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732160168] [2020-11-29 19:47:44,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:44,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:44,535 INFO L87 Difference]: Start difference. First operand 112 states and 190 transitions. Second operand 4 states. [2020-11-29 19:47:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:44,717 INFO L93 Difference]: Finished difference Result 141 states and 241 transitions. [2020-11-29 19:47:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:44,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-29 19:47:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:44,720 INFO L225 Difference]: With dead ends: 141 [2020-11-29 19:47:44,720 INFO L226 Difference]: Without dead ends: 141 [2020-11-29 19:47:44,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:47:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-29 19:47:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-11-29 19:47:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 19:47:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 188 transitions. [2020-11-29 19:47:44,745 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 188 transitions. Word has length 21 [2020-11-29 19:47:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:44,745 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 188 transitions. [2020-11-29 19:47:44,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 188 transitions. [2020-11-29 19:47:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:47:44,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:44,749 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] [2020-11-29 19:47:44,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:47:44,750 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 947275456, now seen corresponding path program 1 times [2020-11-29 19:47:44,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:44,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038706460] [2020-11-29 19:47:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:44,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:44,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038706460] [2020-11-29 19:47:44,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:44,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746482005] [2020-11-29 19:47:44,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:44,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:44,876 INFO L87 Difference]: Start difference. First operand 112 states and 188 transitions. Second operand 4 states. [2020-11-29 19:47:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:45,090 INFO L93 Difference]: Finished difference Result 201 states and 343 transitions. [2020-11-29 19:47:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:45,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-29 19:47:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:45,093 INFO L225 Difference]: With dead ends: 201 [2020-11-29 19:47:45,093 INFO L226 Difference]: Without dead ends: 201 [2020-11-29 19:47:45,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:47:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-29 19:47:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2020-11-29 19:47:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-29 19:47:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2020-11-29 19:47:45,115 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 22 [2020-11-29 19:47:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:45,122 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2020-11-29 19:47:45,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2020-11-29 19:47:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:47:45,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:45,148 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] [2020-11-29 19:47:45,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 19:47:45,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1205440894, now seen corresponding path program 1 times [2020-11-29 19:47:45,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:45,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204023703] [2020-11-29 19:47:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:45,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:45,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204023703] [2020-11-29 19:47:45,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:45,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678504710] [2020-11-29 19:47:45,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:45,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:45,269 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand 4 states. [2020-11-29 19:47:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:45,481 INFO L93 Difference]: Finished difference Result 209 states and 345 transitions. [2020-11-29 19:47:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:45,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-29 19:47:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:45,484 INFO L225 Difference]: With dead ends: 209 [2020-11-29 19:47:45,484 INFO L226 Difference]: Without dead ends: 209 [2020-11-29 19:47:45,484 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 [2020-11-29 19:47:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-29 19:47:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-11-29 19:47:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-11-29 19:47:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 344 transitions. [2020-11-29 19:47:45,517 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 344 transitions. Word has length 22 [2020-11-29 19:47:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:45,518 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 344 transitions. [2020-11-29 19:47:45,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 344 transitions. [2020-11-29 19:47:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:47:45,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:45,523 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] [2020-11-29 19:47:45,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 19:47:45,524 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash -692583242, now seen corresponding path program 1 times [2020-11-29 19:47:45,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116030671] [2020-11-29 19:47:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:45,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116030671] [2020-11-29 19:47:45,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:45,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:45,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781102010] [2020-11-29 19:47:45,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:45,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:45,647 INFO L87 Difference]: Start difference. First operand 208 states and 344 transitions. Second operand 4 states. [2020-11-29 19:47:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:45,837 INFO L93 Difference]: Finished difference Result 215 states and 349 transitions. [2020-11-29 19:47:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:45,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-29 19:47:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:45,839 INFO L225 Difference]: With dead ends: 215 [2020-11-29 19:47:45,840 INFO L226 Difference]: Without dead ends: 215 [2020-11-29 19:47:45,840 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 [2020-11-29 19:47:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-29 19:47:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-11-29 19:47:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 19:47:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 348 transitions. [2020-11-29 19:47:45,864 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 348 transitions. Word has length 23 [2020-11-29 19:47:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:45,865 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 348 transitions. [2020-11-29 19:47:45,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 348 transitions. [2020-11-29 19:47:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:47:45,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:45,875 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] [2020-11-29 19:47:45,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 19:47:45,876 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1279389256, now seen corresponding path program 1 times [2020-11-29 19:47:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:45,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324202394] [2020-11-29 19:47:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:45,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:45,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324202394] [2020-11-29 19:47:45,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:45,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:45,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041613837] [2020-11-29 19:47:45,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:45,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:45,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:45,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:45,957 INFO L87 Difference]: Start difference. First operand 214 states and 348 transitions. Second operand 4 states. [2020-11-29 19:47:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:46,146 INFO L93 Difference]: Finished difference Result 379 states and 621 transitions. [2020-11-29 19:47:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:46,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-29 19:47:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:46,150 INFO L225 Difference]: With dead ends: 379 [2020-11-29 19:47:46,150 INFO L226 Difference]: Without dead ends: 379 [2020-11-29 19:47:46,151 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 [2020-11-29 19:47:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-11-29 19:47:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2020-11-29 19:47:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-11-29 19:47:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2020-11-29 19:47:46,164 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 23 [2020-11-29 19:47:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:46,164 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2020-11-29 19:47:46,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2020-11-29 19:47:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:47:46,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:46,166 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] [2020-11-29 19:47:46,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 19:47:46,167 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1021223818, now seen corresponding path program 1 times [2020-11-29 19:47:46,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:46,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810262993] [2020-11-29 19:47:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:46,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:46,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810262993] [2020-11-29 19:47:46,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:46,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871020011] [2020-11-29 19:47:46,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:46,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:46,259 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand 4 states. [2020-11-29 19:47:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:46,436 INFO L93 Difference]: Finished difference Result 403 states and 633 transitions. [2020-11-29 19:47:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:46,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-29 19:47:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:46,440 INFO L225 Difference]: With dead ends: 403 [2020-11-29 19:47:46,440 INFO L226 Difference]: Without dead ends: 403 [2020-11-29 19:47:46,440 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 [2020-11-29 19:47:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-11-29 19:47:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2020-11-29 19:47:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-11-29 19:47:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 632 transitions. [2020-11-29 19:47:46,456 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 632 transitions. Word has length 23 [2020-11-29 19:47:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:46,457 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 632 transitions. [2020-11-29 19:47:46,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 632 transitions. [2020-11-29 19:47:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:47:46,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:46,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:46,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 19:47:46,459 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:46,460 INFO L82 PathProgramCache]: Analyzing trace with hash -999702007, now seen corresponding path program 1 times [2020-11-29 19:47:46,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:46,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79414192] [2020-11-29 19:47:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:46,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:46,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79414192] [2020-11-29 19:47:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:46,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:46,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456939285] [2020-11-29 19:47:46,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:46,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:46,542 INFO L87 Difference]: Start difference. First operand 402 states and 632 transitions. Second operand 4 states. [2020-11-29 19:47:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:46,749 INFO L93 Difference]: Finished difference Result 411 states and 633 transitions. [2020-11-29 19:47:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:46,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-29 19:47:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:46,753 INFO L225 Difference]: With dead ends: 411 [2020-11-29 19:47:46,753 INFO L226 Difference]: Without dead ends: 411 [2020-11-29 19:47:46,754 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 [2020-11-29 19:47:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-11-29 19:47:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2020-11-29 19:47:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-11-29 19:47:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 632 transitions. [2020-11-29 19:47:46,775 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 632 transitions. Word has length 24 [2020-11-29 19:47:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:46,776 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 632 transitions. [2020-11-29 19:47:46,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 632 transitions. [2020-11-29 19:47:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:47:46,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:46,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:46,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 19:47:46,782 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1586508021, now seen corresponding path program 1 times [2020-11-29 19:47:46,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:46,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867497251] [2020-11-29 19:47:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:46,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:46,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867497251] [2020-11-29 19:47:46,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:46,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:46,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384095365] [2020-11-29 19:47:46,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:46,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:46,872 INFO L87 Difference]: Start difference. First operand 410 states and 632 transitions. Second operand 4 states. [2020-11-29 19:47:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:47,059 INFO L93 Difference]: Finished difference Result 715 states and 1105 transitions. [2020-11-29 19:47:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:47,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-29 19:47:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:47,065 INFO L225 Difference]: With dead ends: 715 [2020-11-29 19:47:47,065 INFO L226 Difference]: Without dead ends: 715 [2020-11-29 19:47:47,066 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 [2020-11-29 19:47:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-11-29 19:47:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586. [2020-11-29 19:47:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-11-29 19:47:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 880 transitions. [2020-11-29 19:47:47,089 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 880 transitions. Word has length 24 [2020-11-29 19:47:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:47,090 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 880 transitions. [2020-11-29 19:47:47,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 880 transitions. [2020-11-29 19:47:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:47:47,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:47,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:47,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 19:47:47,092 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1328342583, now seen corresponding path program 1 times [2020-11-29 19:47:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:47,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513729548] [2020-11-29 19:47:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:47,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513729548] [2020-11-29 19:47:47,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:47,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:47,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709885502] [2020-11-29 19:47:47,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:47,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:47,176 INFO L87 Difference]: Start difference. First operand 586 states and 880 transitions. Second operand 4 states. [2020-11-29 19:47:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:47,358 INFO L93 Difference]: Finished difference Result 779 states and 1145 transitions. [2020-11-29 19:47:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:47,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-11-29 19:47:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:47,364 INFO L225 Difference]: With dead ends: 779 [2020-11-29 19:47:47,364 INFO L226 Difference]: Without dead ends: 779 [2020-11-29 19:47:47,365 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 [2020-11-29 19:47:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-11-29 19:47:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 778. [2020-11-29 19:47:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-29 19:47:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1144 transitions. [2020-11-29 19:47:47,396 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1144 transitions. Word has length 24 [2020-11-29 19:47:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:47,397 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1144 transitions. [2020-11-29 19:47:47,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1144 transitions. [2020-11-29 19:47:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:47:47,399 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:47,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:47,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 19:47:47,400 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1930438559, now seen corresponding path program 1 times [2020-11-29 19:47:47,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:47,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996777742] [2020-11-29 19:47:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:47,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996777742] [2020-11-29 19:47:47,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:47,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:47,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210469115] [2020-11-29 19:47:47,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:47,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:47,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:47,503 INFO L87 Difference]: Start difference. First operand 778 states and 1144 transitions. Second operand 4 states. [2020-11-29 19:47:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:47,671 INFO L93 Difference]: Finished difference Result 795 states and 1145 transitions. [2020-11-29 19:47:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:47,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 19:47:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:47,678 INFO L225 Difference]: With dead ends: 795 [2020-11-29 19:47:47,678 INFO L226 Difference]: Without dead ends: 795 [2020-11-29 19:47:47,680 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 [2020-11-29 19:47:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-11-29 19:47:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 794. [2020-11-29 19:47:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-11-29 19:47:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1144 transitions. [2020-11-29 19:47:47,708 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1144 transitions. Word has length 25 [2020-11-29 19:47:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:47,708 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1144 transitions. [2020-11-29 19:47:47,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1144 transitions. [2020-11-29 19:47:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:47:47,711 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:47,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:47,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 19:47:47,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:47,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1777722723, now seen corresponding path program 1 times [2020-11-29 19:47:47,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:47,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816784546] [2020-11-29 19:47:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:47,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816784546] [2020-11-29 19:47:47,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:47,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211353011] [2020-11-29 19:47:47,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:47,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:47,787 INFO L87 Difference]: Start difference. First operand 794 states and 1144 transitions. Second operand 4 states. [2020-11-29 19:47:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:47,958 INFO L93 Difference]: Finished difference Result 1355 states and 1945 transitions. [2020-11-29 19:47:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:47,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 19:47:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:47,967 INFO L225 Difference]: With dead ends: 1355 [2020-11-29 19:47:47,967 INFO L226 Difference]: Without dead ends: 1355 [2020-11-29 19:47:47,968 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 [2020-11-29 19:47:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-29 19:47:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1162. [2020-11-29 19:47:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-11-29 19:47:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1624 transitions. [2020-11-29 19:47:48,010 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1624 transitions. Word has length 25 [2020-11-29 19:47:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:48,011 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1624 transitions. [2020-11-29 19:47:48,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1624 transitions. [2020-11-29 19:47:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:47:48,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:48,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:48,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 19:47:48,014 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2035888161, now seen corresponding path program 1 times [2020-11-29 19:47:48,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:48,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006619425] [2020-11-29 19:47:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:48,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:48,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006619425] [2020-11-29 19:47:48,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:48,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:48,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674365028] [2020-11-29 19:47:48,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:48,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:48,116 INFO L87 Difference]: Start difference. First operand 1162 states and 1624 transitions. Second operand 4 states. [2020-11-29 19:47:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:48,298 INFO L93 Difference]: Finished difference Result 1515 states and 2057 transitions. [2020-11-29 19:47:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:48,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 19:47:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:48,308 INFO L225 Difference]: With dead ends: 1515 [2020-11-29 19:47:48,308 INFO L226 Difference]: Without dead ends: 1515 [2020-11-29 19:47:48,309 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 [2020-11-29 19:47:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-11-29 19:47:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1514. [2020-11-29 19:47:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-11-29 19:47:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2056 transitions. [2020-11-29 19:47:48,355 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2056 transitions. Word has length 25 [2020-11-29 19:47:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:48,356 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2056 transitions. [2020-11-29 19:47:48,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2056 transitions. [2020-11-29 19:47:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:47:48,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:48,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:48,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-29 19:47:48,360 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:48,360 INFO L82 PathProgramCache]: Analyzing trace with hash -718490028, now seen corresponding path program 1 times [2020-11-29 19:47:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:48,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468522526] [2020-11-29 19:47:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468522526] [2020-11-29 19:47:48,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:48,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:48,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867950605] [2020-11-29 19:47:48,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:48,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:48,420 INFO L87 Difference]: Start difference. First operand 1514 states and 2056 transitions. Second operand 4 states. [2020-11-29 19:47:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:48,563 INFO L93 Difference]: Finished difference Result 1547 states and 2057 transitions. [2020-11-29 19:47:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:48,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-29 19:47:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:48,573 INFO L225 Difference]: With dead ends: 1547 [2020-11-29 19:47:48,573 INFO L226 Difference]: Without dead ends: 1547 [2020-11-29 19:47:48,573 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 [2020-11-29 19:47:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-11-29 19:47:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1546. [2020-11-29 19:47:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-11-29 19:47:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2056 transitions. [2020-11-29 19:47:48,621 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2056 transitions. Word has length 26 [2020-11-29 19:47:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:48,622 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2056 transitions. [2020-11-29 19:47:48,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2056 transitions. [2020-11-29 19:47:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:47:48,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:48,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:48,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-29 19:47:48,625 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1305296042, now seen corresponding path program 1 times [2020-11-29 19:47:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:48,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497670873] [2020-11-29 19:47:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497670873] [2020-11-29 19:47:48,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:48,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269294845] [2020-11-29 19:47:48,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:48,695 INFO L87 Difference]: Start difference. First operand 1546 states and 2056 transitions. Second operand 4 states. [2020-11-29 19:47:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:48,910 INFO L93 Difference]: Finished difference Result 2571 states and 3369 transitions. [2020-11-29 19:47:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:48,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-29 19:47:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:48,926 INFO L225 Difference]: With dead ends: 2571 [2020-11-29 19:47:48,926 INFO L226 Difference]: Without dead ends: 2571 [2020-11-29 19:47:48,927 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 [2020-11-29 19:47:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-11-29 19:47:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2314. [2020-11-29 19:47:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-11-29 19:47:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2984 transitions. [2020-11-29 19:47:49,001 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2984 transitions. Word has length 26 [2020-11-29 19:47:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:49,002 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 2984 transitions. [2020-11-29 19:47:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2984 transitions. [2020-11-29 19:47:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:47:49,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:49,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:49,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 19:47:49,008 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1047130604, now seen corresponding path program 1 times [2020-11-29 19:47:49,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:49,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822298722] [2020-11-29 19:47:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:49,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:49,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822298722] [2020-11-29 19:47:49,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:49,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:49,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138856605] [2020-11-29 19:47:49,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:49,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:49,092 INFO L87 Difference]: Start difference. First operand 2314 states and 2984 transitions. Second operand 4 states. [2020-11-29 19:47:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:49,268 INFO L93 Difference]: Finished difference Result 2955 states and 3657 transitions. [2020-11-29 19:47:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:49,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-29 19:47:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:49,291 INFO L225 Difference]: With dead ends: 2955 [2020-11-29 19:47:49,291 INFO L226 Difference]: Without dead ends: 2955 [2020-11-29 19:47:49,291 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 [2020-11-29 19:47:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-11-29 19:47:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2954. [2020-11-29 19:47:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-11-29 19:47:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3656 transitions. [2020-11-29 19:47:49,386 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3656 transitions. Word has length 26 [2020-11-29 19:47:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:49,387 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 3656 transitions. [2020-11-29 19:47:49,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3656 transitions. [2020-11-29 19:47:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:47:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:49,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:49,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-29 19:47:49,393 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:49,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1802780660, now seen corresponding path program 1 times [2020-11-29 19:47:49,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:49,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629038658] [2020-11-29 19:47:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:49,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629038658] [2020-11-29 19:47:49,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:49,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:49,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872844411] [2020-11-29 19:47:49,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:49,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:49,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:49,472 INFO L87 Difference]: Start difference. First operand 2954 states and 3656 transitions. Second operand 4 states. [2020-11-29 19:47:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:49,640 INFO L93 Difference]: Finished difference Result 3019 states and 3657 transitions. [2020-11-29 19:47:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:49,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 19:47:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:49,659 INFO L225 Difference]: With dead ends: 3019 [2020-11-29 19:47:49,659 INFO L226 Difference]: Without dead ends: 3019 [2020-11-29 19:47:49,659 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 [2020-11-29 19:47:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-11-29 19:47:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3018. [2020-11-29 19:47:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-11-29 19:47:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3656 transitions. [2020-11-29 19:47:49,738 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3656 transitions. Word has length 27 [2020-11-29 19:47:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:49,739 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 3656 transitions. [2020-11-29 19:47:49,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3656 transitions. [2020-11-29 19:47:49,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:47:49,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:49,744 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:49,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-29 19:47:49,744 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1905380622, now seen corresponding path program 1 times [2020-11-29 19:47:49,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:49,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132313957] [2020-11-29 19:47:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:49,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:49,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132313957] [2020-11-29 19:47:49,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:49,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621445010] [2020-11-29 19:47:49,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:49,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:49,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:49,808 INFO L87 Difference]: Start difference. First operand 3018 states and 3656 transitions. Second operand 4 states. [2020-11-29 19:47:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:49,977 INFO L93 Difference]: Finished difference Result 4874 states and 5704 transitions. [2020-11-29 19:47:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:49,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 19:47:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:50,009 INFO L225 Difference]: With dead ends: 4874 [2020-11-29 19:47:50,009 INFO L226 Difference]: Without dead ends: 4874 [2020-11-29 19:47:50,010 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 [2020-11-29 19:47:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-11-29 19:47:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4618. [2020-11-29 19:47:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4618 states. [2020-11-29 19:47:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 5448 transitions. [2020-11-29 19:47:50,166 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 5448 transitions. Word has length 27 [2020-11-29 19:47:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:50,166 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 5448 transitions. [2020-11-29 19:47:50,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 5448 transitions. [2020-11-29 19:47:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:47:50,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:47:50,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:47:50,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-29 19:47:50,175 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 19:47:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:47:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2131421236, now seen corresponding path program 1 times [2020-11-29 19:47:50,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:47:50,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652200559] [2020-11-29 19:47:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:47:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:47:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:47:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:47:50,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652200559] [2020-11-29 19:47:50,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:47:50,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:47:50,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028160850] [2020-11-29 19:47:50,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:47:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:47:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:47:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:47:50,237 INFO L87 Difference]: Start difference. First operand 4618 states and 5448 transitions. Second operand 4 states. [2020-11-29 19:47:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:47:50,410 INFO L93 Difference]: Finished difference Result 5767 states and 6406 transitions. [2020-11-29 19:47:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:47:50,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-29 19:47:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:47:50,411 INFO L225 Difference]: With dead ends: 5767 [2020-11-29 19:47:50,411 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:47:50,411 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 [2020-11-29 19:47:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:47:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:47:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:47:50,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:47:50,412 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-11-29 19:47:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:47:50,412 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:47:50,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:47:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:47:50,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:47:50,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-29 19:47:50,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:47:50 BoogieIcfgContainer [2020-11-29 19:47:50,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:47:50,425 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:47:50,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:47:50,425 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:47:50,426 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:47:41" (3/4) ... [2020-11-29 19:47:50,429 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:47:50,436 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-11-29 19:47:50,436 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 19:47:50,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 19:47:50,448 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-29 19:47:50,448 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:47:50,448 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 19:47:50,449 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:47:50,521 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_262c45a3-190a-41d8-9ef5-606124257a07/bin/uautomizer/witness.graphml [2020-11-29 19:47:50,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:47:50,524 INFO L168 Benchmark]: Toolchain (without parser) took 9522.46 ms. Allocated memory was 96.5 MB in the beginning and 172.0 MB in the end (delta: 75.5 MB). Free memory was 66.3 MB in the beginning and 79.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 62.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:47:50,526 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 96.5 MB. Free memory was 53.9 MB in the beginning and 53.8 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:47:50,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.85 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.3 MB in the beginning and 94.1 MB in the end (delta: -27.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:47:50,528 INFO L168 Benchmark]: Boogie Preprocessor took 44.71 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 92.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:47:50,528 INFO L168 Benchmark]: RCFGBuilder took 506.60 ms. Allocated memory is still 117.4 MB. Free memory was 92.5 MB in the beginning and 73.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:47:50,528 INFO L168 Benchmark]: TraceAbstraction took 8439.69 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 73.1 MB in the beginning and 83.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:47:50,529 INFO L168 Benchmark]: Witness Printer took 96.96 ms. Allocated memory is still 172.0 MB. Free memory was 83.8 MB in the beginning and 79.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:47:50,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 96.5 MB. Free memory was 53.9 MB in the beginning and 53.8 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 409.85 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.3 MB in the beginning and 94.1 MB in the end (delta: -27.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.71 ms. Allocated memory is still 117.4 MB. Free memory was 94.1 MB in the beginning and 92.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 506.60 ms. Allocated memory is still 117.4 MB. Free memory was 92.5 MB in the beginning and 73.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8439.69 ms. Allocated memory was 117.4 MB in the beginning and 172.0 MB in the end (delta: 54.5 MB). Free memory was 73.1 MB in the beginning and 83.8 MB in the end (delta: -10.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. * Witness Printer took 96.96 ms. Allocated memory is still 172.0 MB. Free memory was 83.8 MB in the beginning and 79.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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, 44 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1616 SDtfs, 2261 SDslu, 170 SDs, 0 SdLazy, 1123 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4618occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 508 ConstructedInterpolants, 0 QuantifiedInterpolants, 36258 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...