./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_8.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37d0ed05d77a0379c9ed98058bf2f327252773ce ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:53,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:53,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:53,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:53,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:53,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:53,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:53,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:53,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:53,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:53,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:53,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:53,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:53,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:53,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:53,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:53,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:53,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:53,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:53,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:53,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:53,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:53,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:53,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:53,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:53,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:53,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:53,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:53,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:53,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:53,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:53,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:53,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:53,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:53,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:53,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:53,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:53,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:53,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:53,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:53,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:53,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:53,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:53,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:53,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:53,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:53,290 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:53,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:53,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:53,291 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:53,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:53,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:53,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:53,291 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:53,292 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:53,292 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:53,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:53,292 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:53,293 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:53,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:53,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:53,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:53,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:53,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:53,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:53,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:53,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:53,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:53,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:53,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:53,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37d0ed05d77a0379c9ed98058bf2f327252773ce [2020-10-19 18:23:53,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:53,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:53,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:53,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:53,639 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:53,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_8.c [2020-10-19 18:23:53,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4fe80f5/6def45a1e5ed4e9bb7a342ec06e355c9/FLAGb0cf2ade9 [2020-10-19 18:23:54,111 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:54,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_8.c [2020-10-19 18:23:54,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4fe80f5/6def45a1e5ed4e9bb7a342ec06e355c9/FLAGb0cf2ade9 [2020-10-19 18:23:54,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e4fe80f5/6def45a1e5ed4e9bb7a342ec06e355c9 [2020-10-19 18:23:54,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:54,559 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:54,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:54,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:54,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:54,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bf06580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:54, skipping insertion in model container [2020-10-19 18:23:54,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:54" (1/1) ... [2020-10-19 18:23:54,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:54,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:54,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:54,931 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:54,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:55,098 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:55,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55 WrapperNode [2020-10-19 18:23:55,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:55,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:55,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:55,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:55,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:55,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:55,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:55,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:55,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:55,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:55,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:55,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:55,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:55,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:55,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:55,557 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:55,558 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:55,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:55 BoogieIcfgContainer [2020-10-19 18:23:55,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:55,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:55,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:55,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:55,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:54" (1/3) ... [2020-10-19 18:23:55,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4492dfda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:55, skipping insertion in model container [2020-10-19 18:23:55,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (2/3) ... [2020-10-19 18:23:55,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4492dfda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:55, skipping insertion in model container [2020-10-19 18:23:55,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:55" (3/3) ... [2020-10-19 18:23:55,574 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-10-19 18:23:55,595 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:55,606 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:55,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:55,655 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:55,656 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:55,656 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:55,657 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:55,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:55,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:55,658 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:55,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-19 18:23:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:55,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:55,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:55,698 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -533984572, now seen corresponding path program 1 times [2020-10-19 18:23:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:55,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761262544] [2020-10-19 18:23:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761262544] [2020-10-19 18:23:56,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:56,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160238088] [2020-10-19 18:23:56,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:56,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:56,126 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-19 18:23:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,176 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2020-10-19 18:23:56,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:56,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,190 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:23:56,191 INFO L226 Difference]: Without dead ends: 35 [2020-10-19 18:23:56,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-19 18:23:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-19 18:23:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-19 18:23:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2020-10-19 18:23:56,236 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 9 [2020-10-19 18:23:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,237 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2020-10-19 18:23:56,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2020-10-19 18:23:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:56,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:56,240 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1669689353, now seen corresponding path program 1 times [2020-10-19 18:23:56,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698892224] [2020-10-19 18:23:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698892224] [2020-10-19 18:23:56,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831623148] [2020-10-19 18:23:56,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,376 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2020-10-19 18:23:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,562 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2020-10-19 18:23:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,566 INFO L225 Difference]: With dead ends: 61 [2020-10-19 18:23:56,566 INFO L226 Difference]: Without dead ends: 61 [2020-10-19 18:23:56,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-19 18:23:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-10-19 18:23:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:23:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 75 transitions. [2020-10-19 18:23:56,578 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 75 transitions. Word has length 20 [2020-10-19 18:23:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,579 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 75 transitions. [2020-10-19 18:23:56,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 75 transitions. [2020-10-19 18:23:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:23:56,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:56,581 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1411523915, now seen corresponding path program 1 times [2020-10-19 18:23:56,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685191926] [2020-10-19 18:23:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685191926] [2020-10-19 18:23:56,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938619788] [2020-10-19 18:23:56,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,680 INFO L87 Difference]: Start difference. First operand 44 states and 75 transitions. Second operand 4 states. [2020-10-19 18:23:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,885 INFO L93 Difference]: Finished difference Result 61 states and 104 transitions. [2020-10-19 18:23:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:23:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,889 INFO L225 Difference]: With dead ends: 61 [2020-10-19 18:23:56,889 INFO L226 Difference]: Without dead ends: 61 [2020-10-19 18:23:56,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-19 18:23:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-19 18:23:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 18:23:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 103 transitions. [2020-10-19 18:23:56,909 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 103 transitions. Word has length 20 [2020-10-19 18:23:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,911 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 103 transitions. [2020-10-19 18:23:56,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 103 transitions. [2020-10-19 18:23:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:56,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:56,915 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash -214134839, now seen corresponding path program 1 times [2020-10-19 18:23:56,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758007730] [2020-10-19 18:23:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758007730] [2020-10-19 18:23:57,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872514299] [2020-10-19 18:23:57,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,050 INFO L87 Difference]: Start difference. First operand 60 states and 103 transitions. Second operand 4 states. [2020-10-19 18:23:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,192 INFO L93 Difference]: Finished difference Result 64 states and 106 transitions. [2020-10-19 18:23:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,194 INFO L225 Difference]: With dead ends: 64 [2020-10-19 18:23:57,194 INFO L226 Difference]: Without dead ends: 64 [2020-10-19 18:23:57,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-19 18:23:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-19 18:23:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-19 18:23:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2020-10-19 18:23:57,203 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 21 [2020-10-19 18:23:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,204 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2020-10-19 18:23:57,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2020-10-19 18:23:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:57,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:57,207 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash -800940853, now seen corresponding path program 1 times [2020-10-19 18:23:57,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439652900] [2020-10-19 18:23:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439652900] [2020-10-19 18:23:57,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411536722] [2020-10-19 18:23:57,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,276 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand 4 states. [2020-10-19 18:23:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,410 INFO L93 Difference]: Finished difference Result 113 states and 191 transitions. [2020-10-19 18:23:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,413 INFO L225 Difference]: With dead ends: 113 [2020-10-19 18:23:57,413 INFO L226 Difference]: Without dead ends: 113 [2020-10-19 18:23:57,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-19 18:23:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-19 18:23:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-19 18:23:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 190 transitions. [2020-10-19 18:23:57,425 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 190 transitions. Word has length 21 [2020-10-19 18:23:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,426 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 190 transitions. [2020-10-19 18:23:57,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 190 transitions. [2020-10-19 18:23:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:57,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:57,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1059106291, now seen corresponding path program 1 times [2020-10-19 18:23:57,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127451741] [2020-10-19 18:23:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127451741] [2020-10-19 18:23:57,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282797850] [2020-10-19 18:23:57,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,498 INFO L87 Difference]: Start difference. First operand 112 states and 190 transitions. Second operand 4 states. [2020-10-19 18:23:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,630 INFO L93 Difference]: Finished difference Result 141 states and 241 transitions. [2020-10-19 18:23:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,633 INFO L225 Difference]: With dead ends: 141 [2020-10-19 18:23:57,634 INFO L226 Difference]: Without dead ends: 141 [2020-10-19 18:23:57,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-19 18:23:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-10-19 18:23:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-19 18:23:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 188 transitions. [2020-10-19 18:23:57,646 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 188 transitions. Word has length 21 [2020-10-19 18:23:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,646 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 188 transitions. [2020-10-19 18:23:57,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 188 transitions. [2020-10-19 18:23:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:57,649 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 947275456, now seen corresponding path program 1 times [2020-10-19 18:23:57,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926428869] [2020-10-19 18:23:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926428869] [2020-10-19 18:23:57,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922386882] [2020-10-19 18:23:57,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,714 INFO L87 Difference]: Start difference. First operand 112 states and 188 transitions. Second operand 4 states. [2020-10-19 18:23:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,851 INFO L93 Difference]: Finished difference Result 201 states and 343 transitions. [2020-10-19 18:23:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,854 INFO L225 Difference]: With dead ends: 201 [2020-10-19 18:23:57,854 INFO L226 Difference]: Without dead ends: 201 [2020-10-19 18:23:57,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-19 18:23:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2020-10-19 18:23:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-19 18:23:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2020-10-19 18:23:57,867 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 22 [2020-10-19 18:23:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,867 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2020-10-19 18:23:57,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2020-10-19 18:23:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:57,870 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1205440894, now seen corresponding path program 1 times [2020-10-19 18:23:57,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230485775] [2020-10-19 18:23:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230485775] [2020-10-19 18:23:57,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375098452] [2020-10-19 18:23:57,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,936 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand 4 states. [2020-10-19 18:23:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,062 INFO L93 Difference]: Finished difference Result 209 states and 345 transitions. [2020-10-19 18:23:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,064 INFO L225 Difference]: With dead ends: 209 [2020-10-19 18:23:58,065 INFO L226 Difference]: Without dead ends: 209 [2020-10-19 18:23:58,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-19 18:23:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-19 18:23:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-19 18:23:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 344 transitions. [2020-10-19 18:23:58,076 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 344 transitions. Word has length 22 [2020-10-19 18:23:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,076 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 344 transitions. [2020-10-19 18:23:58,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 344 transitions. [2020-10-19 18:23:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:58,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:58,078 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,079 INFO L82 PathProgramCache]: Analyzing trace with hash -692583242, now seen corresponding path program 1 times [2020-10-19 18:23:58,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039592634] [2020-10-19 18:23:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039592634] [2020-10-19 18:23:58,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74823649] [2020-10-19 18:23:58,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,142 INFO L87 Difference]: Start difference. First operand 208 states and 344 transitions. Second operand 4 states. [2020-10-19 18:23:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,262 INFO L93 Difference]: Finished difference Result 215 states and 349 transitions. [2020-10-19 18:23:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,265 INFO L225 Difference]: With dead ends: 215 [2020-10-19 18:23:58,265 INFO L226 Difference]: Without dead ends: 215 [2020-10-19 18:23:58,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-19 18:23:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-10-19 18:23:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-19 18:23:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 348 transitions. [2020-10-19 18:23:58,275 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 348 transitions. Word has length 23 [2020-10-19 18:23:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,275 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 348 transitions. [2020-10-19 18:23:58,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 348 transitions. [2020-10-19 18:23:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:58,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:58,278 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1279389256, now seen corresponding path program 1 times [2020-10-19 18:23:58,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291114439] [2020-10-19 18:23:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291114439] [2020-10-19 18:23:58,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874319386] [2020-10-19 18:23:58,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,337 INFO L87 Difference]: Start difference. First operand 214 states and 348 transitions. Second operand 4 states. [2020-10-19 18:23:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,475 INFO L93 Difference]: Finished difference Result 379 states and 621 transitions. [2020-10-19 18:23:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,478 INFO L225 Difference]: With dead ends: 379 [2020-10-19 18:23:58,478 INFO L226 Difference]: Without dead ends: 379 [2020-10-19 18:23:58,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-19 18:23:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2020-10-19 18:23:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-19 18:23:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2020-10-19 18:23:58,487 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 23 [2020-10-19 18:23:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,488 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2020-10-19 18:23:58,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2020-10-19 18:23:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:58,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:58,490 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1021223818, now seen corresponding path program 1 times [2020-10-19 18:23:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010579773] [2020-10-19 18:23:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010579773] [2020-10-19 18:23:58,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800998041] [2020-10-19 18:23:58,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,542 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand 4 states. [2020-10-19 18:23:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,651 INFO L93 Difference]: Finished difference Result 403 states and 633 transitions. [2020-10-19 18:23:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,654 INFO L225 Difference]: With dead ends: 403 [2020-10-19 18:23:58,654 INFO L226 Difference]: Without dead ends: 403 [2020-10-19 18:23:58,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-19 18:23:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2020-10-19 18:23:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-19 18:23:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 632 transitions. [2020-10-19 18:23:58,665 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 632 transitions. Word has length 23 [2020-10-19 18:23:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,665 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 632 transitions. [2020-10-19 18:23:58,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 632 transitions. [2020-10-19 18:23:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:58,668 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,668 INFO L82 PathProgramCache]: Analyzing trace with hash -999702007, now seen corresponding path program 1 times [2020-10-19 18:23:58,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360569130] [2020-10-19 18:23:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360569130] [2020-10-19 18:23:58,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770541979] [2020-10-19 18:23:58,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,721 INFO L87 Difference]: Start difference. First operand 402 states and 632 transitions. Second operand 4 states. [2020-10-19 18:23:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,827 INFO L93 Difference]: Finished difference Result 411 states and 633 transitions. [2020-10-19 18:23:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,830 INFO L225 Difference]: With dead ends: 411 [2020-10-19 18:23:58,830 INFO L226 Difference]: Without dead ends: 411 [2020-10-19 18:23:58,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-19 18:23:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2020-10-19 18:23:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-19 18:23:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 632 transitions. [2020-10-19 18:23:58,841 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 632 transitions. Word has length 24 [2020-10-19 18:23:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,841 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 632 transitions. [2020-10-19 18:23:58,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 632 transitions. [2020-10-19 18:23:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:58,843 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1586508021, now seen corresponding path program 1 times [2020-10-19 18:23:58,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508019336] [2020-10-19 18:23:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508019336] [2020-10-19 18:23:58,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444519002] [2020-10-19 18:23:58,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,890 INFO L87 Difference]: Start difference. First operand 410 states and 632 transitions. Second operand 4 states. [2020-10-19 18:23:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,000 INFO L93 Difference]: Finished difference Result 715 states and 1105 transitions. [2020-10-19 18:23:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,005 INFO L225 Difference]: With dead ends: 715 [2020-10-19 18:23:59,005 INFO L226 Difference]: Without dead ends: 715 [2020-10-19 18:23:59,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-19 18:23:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586. [2020-10-19 18:23:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-19 18:23:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 880 transitions. [2020-10-19 18:23:59,021 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 880 transitions. Word has length 24 [2020-10-19 18:23:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,021 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 880 transitions. [2020-10-19 18:23:59,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 880 transitions. [2020-10-19 18:23:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:59,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:59,024 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1328342583, now seen corresponding path program 1 times [2020-10-19 18:23:59,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972852733] [2020-10-19 18:23:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972852733] [2020-10-19 18:23:59,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838658954] [2020-10-19 18:23:59,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,072 INFO L87 Difference]: Start difference. First operand 586 states and 880 transitions. Second operand 4 states. [2020-10-19 18:23:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,193 INFO L93 Difference]: Finished difference Result 779 states and 1145 transitions. [2020-10-19 18:23:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,199 INFO L225 Difference]: With dead ends: 779 [2020-10-19 18:23:59,199 INFO L226 Difference]: Without dead ends: 779 [2020-10-19 18:23:59,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-19 18:23:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 778. [2020-10-19 18:23:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-19 18:23:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1144 transitions. [2020-10-19 18:23:59,219 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1144 transitions. Word has length 24 [2020-10-19 18:23:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,219 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1144 transitions. [2020-10-19 18:23:59,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1144 transitions. [2020-10-19 18:23:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:59,222 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1930438559, now seen corresponding path program 1 times [2020-10-19 18:23:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705099394] [2020-10-19 18:23:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705099394] [2020-10-19 18:23:59,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214255137] [2020-10-19 18:23:59,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,270 INFO L87 Difference]: Start difference. First operand 778 states and 1144 transitions. Second operand 4 states. [2020-10-19 18:23:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,370 INFO L93 Difference]: Finished difference Result 795 states and 1145 transitions. [2020-10-19 18:23:59,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,375 INFO L225 Difference]: With dead ends: 795 [2020-10-19 18:23:59,375 INFO L226 Difference]: Without dead ends: 795 [2020-10-19 18:23:59,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-19 18:23:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 794. [2020-10-19 18:23:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-10-19 18:23:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1144 transitions. [2020-10-19 18:23:59,394 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1144 transitions. Word has length 25 [2020-10-19 18:23:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,394 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1144 transitions. [2020-10-19 18:23:59,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1144 transitions. [2020-10-19 18:23:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:23:59,397 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1777722723, now seen corresponding path program 1 times [2020-10-19 18:23:59,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581607781] [2020-10-19 18:23:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581607781] [2020-10-19 18:23:59,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270098665] [2020-10-19 18:23:59,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,444 INFO L87 Difference]: Start difference. First operand 794 states and 1144 transitions. Second operand 4 states. [2020-10-19 18:23:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,547 INFO L93 Difference]: Finished difference Result 1355 states and 1945 transitions. [2020-10-19 18:23:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,554 INFO L225 Difference]: With dead ends: 1355 [2020-10-19 18:23:59,555 INFO L226 Difference]: Without dead ends: 1355 [2020-10-19 18:23:59,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-10-19 18:23:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1162. [2020-10-19 18:23:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-19 18:23:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1624 transitions. [2020-10-19 18:23:59,583 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1624 transitions. Word has length 25 [2020-10-19 18:23:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,584 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1624 transitions. [2020-10-19 18:23:59,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1624 transitions. [2020-10-19 18:23:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:23:59,588 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2035888161, now seen corresponding path program 1 times [2020-10-19 18:23:59,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049452496] [2020-10-19 18:23:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049452496] [2020-10-19 18:23:59,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350321763] [2020-10-19 18:23:59,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,637 INFO L87 Difference]: Start difference. First operand 1162 states and 1624 transitions. Second operand 4 states. [2020-10-19 18:23:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,744 INFO L93 Difference]: Finished difference Result 1515 states and 2057 transitions. [2020-10-19 18:23:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,752 INFO L225 Difference]: With dead ends: 1515 [2020-10-19 18:23:59,753 INFO L226 Difference]: Without dead ends: 1515 [2020-10-19 18:23:59,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-10-19 18:23:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1514. [2020-10-19 18:23:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-10-19 18:23:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2056 transitions. [2020-10-19 18:23:59,793 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2056 transitions. Word has length 25 [2020-10-19 18:23:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,793 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2056 transitions. [2020-10-19 18:23:59,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2056 transitions. [2020-10-19 18:23:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:59,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:23:59,797 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,798 INFO L82 PathProgramCache]: Analyzing trace with hash -718490028, now seen corresponding path program 1 times [2020-10-19 18:23:59,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739919489] [2020-10-19 18:23:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739919489] [2020-10-19 18:23:59,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453090057] [2020-10-19 18:23:59,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,850 INFO L87 Difference]: Start difference. First operand 1514 states and 2056 transitions. Second operand 4 states. [2020-10-19 18:23:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,969 INFO L93 Difference]: Finished difference Result 1547 states and 2057 transitions. [2020-10-19 18:23:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,978 INFO L225 Difference]: With dead ends: 1547 [2020-10-19 18:23:59,978 INFO L226 Difference]: Without dead ends: 1547 [2020-10-19 18:23:59,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-19 18:24:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1546. [2020-10-19 18:24:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-19 18:24:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2056 transitions. [2020-10-19 18:24:00,017 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2056 transitions. Word has length 26 [2020-10-19 18:24:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,017 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2056 transitions. [2020-10-19 18:24:00,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2056 transitions. [2020-10-19 18:24:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:24:00,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 18:24:00,021 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1305296042, now seen corresponding path program 1 times [2020-10-19 18:24:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293912274] [2020-10-19 18:24:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293912274] [2020-10-19 18:24:00,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851264872] [2020-10-19 18:24:00,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,070 INFO L87 Difference]: Start difference. First operand 1546 states and 2056 transitions. Second operand 4 states. [2020-10-19 18:24:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:00,202 INFO L93 Difference]: Finished difference Result 2571 states and 3369 transitions. [2020-10-19 18:24:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:00,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:24:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:00,215 INFO L225 Difference]: With dead ends: 2571 [2020-10-19 18:24:00,216 INFO L226 Difference]: Without dead ends: 2571 [2020-10-19 18:24:00,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-10-19 18:24:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2314. [2020-10-19 18:24:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-19 18:24:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2984 transitions. [2020-10-19 18:24:00,276 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2984 transitions. Word has length 26 [2020-10-19 18:24:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,277 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 2984 transitions. [2020-10-19 18:24:00,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2984 transitions. [2020-10-19 18:24:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:24:00,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 18:24:00,283 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1047130604, now seen corresponding path program 1 times [2020-10-19 18:24:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115196289] [2020-10-19 18:24:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115196289] [2020-10-19 18:24:00,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341412050] [2020-10-19 18:24:00,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,333 INFO L87 Difference]: Start difference. First operand 2314 states and 2984 transitions. Second operand 4 states. [2020-10-19 18:24:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:00,486 INFO L93 Difference]: Finished difference Result 2955 states and 3657 transitions. [2020-10-19 18:24:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:00,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:24:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:00,499 INFO L225 Difference]: With dead ends: 2955 [2020-10-19 18:24:00,499 INFO L226 Difference]: Without dead ends: 2955 [2020-10-19 18:24:00,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-19 18:24:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2954. [2020-10-19 18:24:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-10-19 18:24:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3656 transitions. [2020-10-19 18:24:00,562 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3656 transitions. Word has length 26 [2020-10-19 18:24:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,563 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 3656 transitions. [2020-10-19 18:24:00,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3656 transitions. [2020-10-19 18:24:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:00,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 18:24:00,568 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1802780660, now seen corresponding path program 1 times [2020-10-19 18:24:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28338035] [2020-10-19 18:24:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28338035] [2020-10-19 18:24:00,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690617451] [2020-10-19 18:24:00,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,612 INFO L87 Difference]: Start difference. First operand 2954 states and 3656 transitions. Second operand 4 states. [2020-10-19 18:24:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:00,745 INFO L93 Difference]: Finished difference Result 3019 states and 3657 transitions. [2020-10-19 18:24:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:00,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:24:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:00,760 INFO L225 Difference]: With dead ends: 3019 [2020-10-19 18:24:00,760 INFO L226 Difference]: Without dead ends: 3019 [2020-10-19 18:24:00,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-10-19 18:24:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3018. [2020-10-19 18:24:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-10-19 18:24:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3656 transitions. [2020-10-19 18:24:00,824 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3656 transitions. Word has length 27 [2020-10-19 18:24:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,824 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 3656 transitions. [2020-10-19 18:24:00,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3656 transitions. [2020-10-19 18:24:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:00,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 18:24:00,830 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1905380622, now seen corresponding path program 1 times [2020-10-19 18:24:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744407177] [2020-10-19 18:24:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744407177] [2020-10-19 18:24:00,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436283902] [2020-10-19 18:24:00,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,888 INFO L87 Difference]: Start difference. First operand 3018 states and 3656 transitions. Second operand 4 states. [2020-10-19 18:24:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:01,001 INFO L93 Difference]: Finished difference Result 4874 states and 5704 transitions. [2020-10-19 18:24:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:01,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:24:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:01,022 INFO L225 Difference]: With dead ends: 4874 [2020-10-19 18:24:01,022 INFO L226 Difference]: Without dead ends: 4874 [2020-10-19 18:24:01,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-10-19 18:24:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4618. [2020-10-19 18:24:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4618 states. [2020-10-19 18:24:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 5448 transitions. [2020-10-19 18:24:01,112 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 5448 transitions. Word has length 27 [2020-10-19 18:24:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:01,113 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 5448 transitions. [2020-10-19 18:24:01,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 5448 transitions. [2020-10-19 18:24:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:01,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:01,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:01,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 18:24:01,121 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2131421236, now seen corresponding path program 1 times [2020-10-19 18:24:01,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:01,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350099022] [2020-10-19 18:24:01,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:01,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350099022] [2020-10-19 18:24:01,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:01,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:01,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110722437] [2020-10-19 18:24:01,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:01,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:01,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:01,171 INFO L87 Difference]: Start difference. First operand 4618 states and 5448 transitions. Second operand 4 states. [2020-10-19 18:24:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:01,282 INFO L93 Difference]: Finished difference Result 5767 states and 6406 transitions. [2020-10-19 18:24:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:01,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:24:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:01,283 INFO L225 Difference]: With dead ends: 5767 [2020-10-19 18:24:01,283 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:24:01,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:24:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:24:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:24:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:24:01,284 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-10-19 18:24:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:01,284 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:24:01,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:24:01,284 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:24:01,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 18:24:01,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:24:01 BoogieIcfgContainer [2020-10-19 18:24:01,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:24:01,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:24:01,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:24:01,291 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:24:01,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:55" (3/4) ... [2020-10-19 18:24:01,296 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:24:01,303 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:24:01,304 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:24:01,304 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:24:01,310 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:24:01,311 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:24:01,311 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:24:01,311 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:24:01,366 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:24:01,366 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:24:01,368 INFO L168 Benchmark]: Toolchain (without parser) took 6814.60 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 317.7 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -163.0 MB). Peak memory consumption was 154.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:01,369 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:24:01,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:01,369 INFO L168 Benchmark]: Boogie Preprocessor took 60.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:01,370 INFO L168 Benchmark]: RCFGBuilder took 398.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:01,370 INFO L168 Benchmark]: TraceAbstraction took 5728.48 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 189.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -25.7 MB). Peak memory consumption was 164.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:01,370 INFO L168 Benchmark]: Witness Printer took 75.04 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:24:01,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 539.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -168.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 60.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 398.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5728.48 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 189.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -25.7 MB). Peak memory consumption was 164.1 MB. Max. memory is 11.5 GB. * Witness Printer took 75.04 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 44 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.6s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 3.0s, 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, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s 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: 0.5s AutomataMinimizationTime, 23 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s 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...