./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_11.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93221bc263791497331acd2a7a0150037c621aa ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:23,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:23,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:23,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:23,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:23,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:23,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:23,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:23,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:23,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:23,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:23,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:23,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:23,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:23,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:23,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:23,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:23,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:23,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:23,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:23,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:23,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:23,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:23,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:23,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:23,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:23,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:23,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:23,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:23,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:23,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:23,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:23,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:23,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:23,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:23,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:23,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:23,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:23,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:23,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:23,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:23,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:23,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:23,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:23,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:23,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:23,336 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:23,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:23,337 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:23,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:23,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:23,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:23,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:23,339 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:23,339 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:23,340 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:23,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:23,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:23,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:23,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:23,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:23,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:23,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:23,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:23,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:23,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:23,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:23,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:23,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:23,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:23,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93221bc263791497331acd2a7a0150037c621aa [2020-10-19 18:23:23,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:23,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:23,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:23,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:23,735 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:23,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_11.c [2020-10-19 18:23:23,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcfe6e18/10b69f2f660447fa9b1bd65374a68bcc/FLAG0a4b81cc1 [2020-10-19 18:23:24,281 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:24,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_11.c [2020-10-19 18:23:24,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcfe6e18/10b69f2f660447fa9b1bd65374a68bcc/FLAG0a4b81cc1 [2020-10-19 18:23:24,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebcfe6e18/10b69f2f660447fa9b1bd65374a68bcc [2020-10-19 18:23:24,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:24,677 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:24,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:24,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:24,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:24,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:24" (1/1) ... [2020-10-19 18:23:24,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236c7778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:24, skipping insertion in model container [2020-10-19 18:23:24,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:24" (1/1) ... [2020-10-19 18:23:24,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:24,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:24,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:24,984 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:25,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:25,111 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:25,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25 WrapperNode [2020-10-19 18:23:25,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:25,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:25,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:25,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:25,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (1/1) ... [2020-10-19 18:23:25,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:25,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:25,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:25,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:25,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (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 18:23:25,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:25,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:25,219 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:25,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:25,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:25,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:25,220 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:25,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:25,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:25,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:25,583 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:25,584 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:25,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:25 BoogieIcfgContainer [2020-10-19 18:23:25,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:25,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:25,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:25,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:25,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:24" (1/3) ... [2020-10-19 18:23:25,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a26e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:25, skipping insertion in model container [2020-10-19 18:23:25,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:25" (2/3) ... [2020-10-19 18:23:25,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a26e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:25, skipping insertion in model container [2020-10-19 18:23:25,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:25" (3/3) ... [2020-10-19 18:23:25,597 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-10-19 18:23:25,609 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:25,616 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:25,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:25,655 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:25,656 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:25,656 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:25,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:25,657 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:25,657 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:25,657 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:25,658 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-19 18:23:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:25,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:25,690 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1012612054, now seen corresponding path program 1 times [2020-10-19 18:23:25,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:25,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698631614] [2020-10-19 18:23:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:25,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:25,939 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 18:23:25,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698631614] [2020-10-19 18:23:25,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:25,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:25,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701092249] [2020-10-19 18:23:25,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:25,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:25,967 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-10-19 18:23:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:26,024 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2020-10-19 18:23:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:26,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:26,040 INFO L225 Difference]: With dead ends: 49 [2020-10-19 18:23:26,040 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 18:23:26,042 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 18:23:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 18:23:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-19 18:23:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 18:23:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 76 transitions. [2020-10-19 18:23:26,087 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 76 transitions. Word has length 9 [2020-10-19 18:23:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:26,088 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 76 transitions. [2020-10-19 18:23:26,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 76 transitions. [2020-10-19 18:23:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:26,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:26,090 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 18:23:26,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:26,091 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:26,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2067841466, now seen corresponding path program 1 times [2020-10-19 18:23:26,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:26,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939610416] [2020-10-19 18:23:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:26,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:26,288 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 18:23:26,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939610416] [2020-10-19 18:23:26,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:26,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246118440] [2020-10-19 18:23:26,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:26,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:26,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:26,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:26,295 INFO L87 Difference]: Start difference. First operand 44 states and 76 transitions. Second operand 4 states. [2020-10-19 18:23:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:26,522 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2020-10-19 18:23:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:26,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:26,527 INFO L225 Difference]: With dead ends: 79 [2020-10-19 18:23:26,527 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:23:26,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:23:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2020-10-19 18:23:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-19 18:23:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 99 transitions. [2020-10-19 18:23:26,541 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 99 transitions. Word has length 23 [2020-10-19 18:23:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:26,542 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 99 transitions. [2020-10-19 18:23:26,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 99 transitions. [2020-10-19 18:23:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:26,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:26,544 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 18:23:26,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:26,545 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:26,546 INFO L82 PathProgramCache]: Analyzing trace with hash 947262152, now seen corresponding path program 1 times [2020-10-19 18:23:26,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:26,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211946115] [2020-10-19 18:23:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:26,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211946115] [2020-10-19 18:23:26,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:26,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728475215] [2020-10-19 18:23:26,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:26,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:26,693 INFO L87 Difference]: Start difference. First operand 56 states and 99 transitions. Second operand 4 states. [2020-10-19 18:23:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:26,912 INFO L93 Difference]: Finished difference Result 79 states and 140 transitions. [2020-10-19 18:23:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:26,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:26,918 INFO L225 Difference]: With dead ends: 79 [2020-10-19 18:23:26,918 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:23:26,918 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 18:23:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:23:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-19 18:23:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 18:23:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 139 transitions. [2020-10-19 18:23:26,934 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 139 transitions. Word has length 23 [2020-10-19 18:23:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:26,935 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 139 transitions. [2020-10-19 18:23:26,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 139 transitions. [2020-10-19 18:23:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:26,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:26,937 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 18:23:26,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:26,938 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 328021414, now seen corresponding path program 1 times [2020-10-19 18:23:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:26,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082171602] [2020-10-19 18:23:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,016 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 18:23:27,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082171602] [2020-10-19 18:23:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:27,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115589066] [2020-10-19 18:23:27,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:27,020 INFO L87 Difference]: Start difference. First operand 78 states and 139 transitions. Second operand 4 states. [2020-10-19 18:23:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:27,187 INFO L93 Difference]: Finished difference Result 82 states and 142 transitions. [2020-10-19 18:23:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:27,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:27,189 INFO L225 Difference]: With dead ends: 82 [2020-10-19 18:23:27,190 INFO L226 Difference]: Without dead ends: 82 [2020-10-19 18:23:27,190 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 18:23:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-19 18:23:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-19 18:23:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-19 18:23:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 141 transitions. [2020-10-19 18:23:27,200 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 141 transitions. Word has length 24 [2020-10-19 18:23:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:27,201 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 141 transitions. [2020-10-19 18:23:27,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-10-19 18:23:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:27,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:27,203 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 18:23:27,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:27,204 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash -693046940, now seen corresponding path program 1 times [2020-10-19 18:23:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:27,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500598232] [2020-10-19 18:23:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,278 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 18:23:27,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500598232] [2020-10-19 18:23:27,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:27,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:27,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384643835] [2020-10-19 18:23:27,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:27,281 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 4 states. [2020-10-19 18:23:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:27,435 INFO L93 Difference]: Finished difference Result 149 states and 263 transitions. [2020-10-19 18:23:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:27,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:27,438 INFO L225 Difference]: With dead ends: 149 [2020-10-19 18:23:27,438 INFO L226 Difference]: Without dead ends: 149 [2020-10-19 18:23:27,439 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 18:23:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-19 18:23:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-19 18:23:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-19 18:23:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 262 transitions. [2020-10-19 18:23:27,450 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 262 transitions. Word has length 24 [2020-10-19 18:23:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:27,450 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 262 transitions. [2020-10-19 18:23:27,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 262 transitions. [2020-10-19 18:23:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:27,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:27,453 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 18:23:27,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:27,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash 586816738, now seen corresponding path program 1 times [2020-10-19 18:23:27,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:27,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97825520] [2020-10-19 18:23:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,515 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 18:23:27,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97825520] [2020-10-19 18:23:27,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:27,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:27,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866729810] [2020-10-19 18:23:27,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:27,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:27,518 INFO L87 Difference]: Start difference. First operand 148 states and 262 transitions. Second operand 4 states. [2020-10-19 18:23:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:27,672 INFO L93 Difference]: Finished difference Result 189 states and 337 transitions. [2020-10-19 18:23:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:27,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:27,675 INFO L225 Difference]: With dead ends: 189 [2020-10-19 18:23:27,675 INFO L226 Difference]: Without dead ends: 189 [2020-10-19 18:23:27,676 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 18:23:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-19 18:23:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2020-10-19 18:23:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-19 18:23:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 260 transitions. [2020-10-19 18:23:27,686 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 260 transitions. Word has length 24 [2020-10-19 18:23:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:27,687 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 260 transitions. [2020-10-19 18:23:27,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 260 transitions. [2020-10-19 18:23:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:27,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:27,689 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 18:23:27,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:27,690 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash -3010669, now seen corresponding path program 1 times [2020-10-19 18:23:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:27,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117210323] [2020-10-19 18:23:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,751 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 18:23:27,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117210323] [2020-10-19 18:23:27,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:27,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843080496] [2020-10-19 18:23:27,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:27,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:27,755 INFO L87 Difference]: Start difference. First operand 148 states and 260 transitions. Second operand 4 states. [2020-10-19 18:23:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:27,899 INFO L93 Difference]: Finished difference Result 273 states and 487 transitions. [2020-10-19 18:23:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:27,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:27,902 INFO L225 Difference]: With dead ends: 273 [2020-10-19 18:23:27,902 INFO L226 Difference]: Without dead ends: 273 [2020-10-19 18:23:27,903 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 18:23:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-19 18:23:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2020-10-19 18:23:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-19 18:23:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 350 transitions. [2020-10-19 18:23:27,917 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 350 transitions. Word has length 25 [2020-10-19 18:23:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:27,918 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 350 transitions. [2020-10-19 18:23:27,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 350 transitions. [2020-10-19 18:23:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:27,921 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 18:23:27,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:27,921 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1282874347, now seen corresponding path program 1 times [2020-10-19 18:23:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:27,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949434066] [2020-10-19 18:23:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:27,982 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 18:23:27,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949434066] [2020-10-19 18:23:27,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:27,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076250866] [2020-10-19 18:23:27,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:27,986 INFO L87 Difference]: Start difference. First operand 200 states and 350 transitions. Second operand 4 states. [2020-10-19 18:23:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:28,142 INFO L93 Difference]: Finished difference Result 281 states and 489 transitions. [2020-10-19 18:23:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:28,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:28,145 INFO L225 Difference]: With dead ends: 281 [2020-10-19 18:23:28,145 INFO L226 Difference]: Without dead ends: 281 [2020-10-19 18:23:28,146 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 18:23:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-19 18:23:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2020-10-19 18:23:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-19 18:23:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 488 transitions. [2020-10-19 18:23:28,157 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 488 transitions. Word has length 25 [2020-10-19 18:23:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:28,158 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 488 transitions. [2020-10-19 18:23:28,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 488 transitions. [2020-10-19 18:23:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:28,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:28,160 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 18:23:28,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:28,161 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:28,161 INFO L82 PathProgramCache]: Analyzing trace with hash -86712177, now seen corresponding path program 1 times [2020-10-19 18:23:28,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:28,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246673210] [2020-10-19 18:23:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:28,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:28,218 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 18:23:28,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246673210] [2020-10-19 18:23:28,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:28,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:28,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229260754] [2020-10-19 18:23:28,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:28,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:28,222 INFO L87 Difference]: Start difference. First operand 280 states and 488 transitions. Second operand 4 states. [2020-10-19 18:23:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:28,430 INFO L93 Difference]: Finished difference Result 287 states and 493 transitions. [2020-10-19 18:23:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:28,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:28,433 INFO L225 Difference]: With dead ends: 287 [2020-10-19 18:23:28,436 INFO L226 Difference]: Without dead ends: 287 [2020-10-19 18:23:28,437 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 18:23:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-19 18:23:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2020-10-19 18:23:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-19 18:23:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 492 transitions. [2020-10-19 18:23:28,447 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 492 transitions. Word has length 26 [2020-10-19 18:23:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:28,448 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 492 transitions. [2020-10-19 18:23:28,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 492 transitions. [2020-10-19 18:23:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:28,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:28,453 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 18:23:28,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:28,454 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1107780531, now seen corresponding path program 1 times [2020-10-19 18:23:28,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:28,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443191845] [2020-10-19 18:23:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:28,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:28,541 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 18:23:28,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443191845] [2020-10-19 18:23:28,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:28,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:28,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821235996] [2020-10-19 18:23:28,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:28,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:28,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:28,546 INFO L87 Difference]: Start difference. First operand 286 states and 492 transitions. Second operand 4 states. [2020-10-19 18:23:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:28,700 INFO L93 Difference]: Finished difference Result 523 states and 909 transitions. [2020-10-19 18:23:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:28,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:28,705 INFO L225 Difference]: With dead ends: 523 [2020-10-19 18:23:28,705 INFO L226 Difference]: Without dead ends: 523 [2020-10-19 18:23:28,706 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 18:23:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-19 18:23:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 394. [2020-10-19 18:23:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-19 18:23:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 668 transitions. [2020-10-19 18:23:28,717 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 668 transitions. Word has length 26 [2020-10-19 18:23:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:28,719 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 668 transitions. [2020-10-19 18:23:28,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 668 transitions. [2020-10-19 18:23:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:28,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:28,721 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 18:23:28,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:28,722 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1907323087, now seen corresponding path program 1 times [2020-10-19 18:23:28,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:28,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883989465] [2020-10-19 18:23:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:28,800 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 18:23:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883989465] [2020-10-19 18:23:28,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:28,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:28,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551889189] [2020-10-19 18:23:28,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:28,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:28,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:28,803 INFO L87 Difference]: Start difference. First operand 394 states and 668 transitions. Second operand 4 states. [2020-10-19 18:23:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:28,938 INFO L93 Difference]: Finished difference Result 547 states and 921 transitions. [2020-10-19 18:23:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:28,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:28,943 INFO L225 Difference]: With dead ends: 547 [2020-10-19 18:23:28,943 INFO L226 Difference]: Without dead ends: 547 [2020-10-19 18:23:28,943 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 18:23:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-19 18:23:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 546. [2020-10-19 18:23:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-10-19 18:23:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 920 transitions. [2020-10-19 18:23:28,958 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 920 transitions. Word has length 26 [2020-10-19 18:23:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:28,959 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 920 transitions. [2020-10-19 18:23:28,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 920 transitions. [2020-10-19 18:23:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:23:28,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:28,963 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 18:23:28,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:28,963 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 25171040, now seen corresponding path program 1 times [2020-10-19 18:23:28,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160721502] [2020-10-19 18:23:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,016 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 18:23:29,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160721502] [2020-10-19 18:23:29,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:29,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:29,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577264179] [2020-10-19 18:23:29,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:29,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:29,018 INFO L87 Difference]: Start difference. First operand 546 states and 920 transitions. Second operand 4 states. [2020-10-19 18:23:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:29,148 INFO L93 Difference]: Finished difference Result 555 states and 921 transitions. [2020-10-19 18:23:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:29,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:23:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:29,152 INFO L225 Difference]: With dead ends: 555 [2020-10-19 18:23:29,152 INFO L226 Difference]: Without dead ends: 555 [2020-10-19 18:23:29,152 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 18:23:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-19 18:23:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 554. [2020-10-19 18:23:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-19 18:23:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 920 transitions. [2020-10-19 18:23:29,166 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 920 transitions. Word has length 27 [2020-10-19 18:23:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:29,167 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 920 transitions. [2020-10-19 18:23:29,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 920 transitions. [2020-10-19 18:23:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:23:29,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:29,168 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 18:23:29,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:29,169 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash -995897314, now seen corresponding path program 1 times [2020-10-19 18:23:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776868614] [2020-10-19 18:23:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,213 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 18:23:29,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776868614] [2020-10-19 18:23:29,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:29,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:29,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221469034] [2020-10-19 18:23:29,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:29,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:29,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:29,216 INFO L87 Difference]: Start difference. First operand 554 states and 920 transitions. Second operand 4 states. [2020-10-19 18:23:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:29,344 INFO L93 Difference]: Finished difference Result 1003 states and 1681 transitions. [2020-10-19 18:23:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:29,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:23:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:29,350 INFO L225 Difference]: With dead ends: 1003 [2020-10-19 18:23:29,350 INFO L226 Difference]: Without dead ends: 1003 [2020-10-19 18:23:29,350 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 18:23:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-10-19 18:23:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 778. [2020-10-19 18:23:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-19 18:23:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1264 transitions. [2020-10-19 18:23:29,371 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1264 transitions. Word has length 27 [2020-10-19 18:23:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:29,372 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1264 transitions. [2020-10-19 18:23:29,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1264 transitions. [2020-10-19 18:23:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:23:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:29,374 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 18:23:29,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:29,374 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2019206304, now seen corresponding path program 1 times [2020-10-19 18:23:29,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:29,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297783073] [2020-10-19 18:23:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:29,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297783073] [2020-10-19 18:23:29,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:29,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:29,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138066259] [2020-10-19 18:23:29,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:29,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:29,419 INFO L87 Difference]: Start difference. First operand 778 states and 1264 transitions. Second operand 4 states. [2020-10-19 18:23:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:29,566 INFO L93 Difference]: Finished difference Result 1067 states and 1721 transitions. [2020-10-19 18:23:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:29,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:23:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:29,574 INFO L225 Difference]: With dead ends: 1067 [2020-10-19 18:23:29,575 INFO L226 Difference]: Without dead ends: 1067 [2020-10-19 18:23:29,576 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 18:23:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-10-19 18:23:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1066. [2020-10-19 18:23:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-10-19 18:23:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1720 transitions. [2020-10-19 18:23:29,615 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1720 transitions. Word has length 27 [2020-10-19 18:23:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:29,616 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1720 transitions. [2020-10-19 18:23:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1720 transitions. [2020-10-19 18:23:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:23:29,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:29,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:29,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:29,619 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -801405958, now seen corresponding path program 1 times [2020-10-19 18:23:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:29,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374569130] [2020-10-19 18:23:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,675 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 18:23:29,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374569130] [2020-10-19 18:23:29,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:29,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:29,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261827307] [2020-10-19 18:23:29,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:29,678 INFO L87 Difference]: Start difference. First operand 1066 states and 1720 transitions. Second operand 4 states. [2020-10-19 18:23:29,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:29,822 INFO L93 Difference]: Finished difference Result 1083 states and 1721 transitions. [2020-10-19 18:23:29,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:29,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:23:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:29,827 INFO L225 Difference]: With dead ends: 1083 [2020-10-19 18:23:29,827 INFO L226 Difference]: Without dead ends: 1083 [2020-10-19 18:23:29,828 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 18:23:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-10-19 18:23:29,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1082. [2020-10-19 18:23:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-10-19 18:23:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1720 transitions. [2020-10-19 18:23:29,853 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1720 transitions. Word has length 28 [2020-10-19 18:23:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:29,853 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1720 transitions. [2020-10-19 18:23:29,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1720 transitions. [2020-10-19 18:23:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:23:29,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:29,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:29,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:23:29,856 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1822474312, now seen corresponding path program 1 times [2020-10-19 18:23:29,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:29,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858548240] [2020-10-19 18:23:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:29,905 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 18:23:29,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858548240] [2020-10-19 18:23:29,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:29,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:29,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142423023] [2020-10-19 18:23:29,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:29,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:29,907 INFO L87 Difference]: Start difference. First operand 1082 states and 1720 transitions. Second operand 4 states. [2020-10-19 18:23:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:30,062 INFO L93 Difference]: Finished difference Result 1931 states and 3097 transitions. [2020-10-19 18:23:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:30,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:23:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:30,071 INFO L225 Difference]: With dead ends: 1931 [2020-10-19 18:23:30,072 INFO L226 Difference]: Without dead ends: 1931 [2020-10-19 18:23:30,072 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 18:23:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-10-19 18:23:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1546. [2020-10-19 18:23:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-19 18:23:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2392 transitions. [2020-10-19 18:23:30,121 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2392 transitions. Word has length 28 [2020-10-19 18:23:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:30,122 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2392 transitions. [2020-10-19 18:23:30,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2392 transitions. [2020-10-19 18:23:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:23:30,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:30,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:30,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:23:30,125 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1192629306, now seen corresponding path program 1 times [2020-10-19 18:23:30,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:30,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583096184] [2020-10-19 18:23:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:30,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:30,182 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 18:23:30,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583096184] [2020-10-19 18:23:30,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:30,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:30,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006406589] [2020-10-19 18:23:30,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:30,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:30,186 INFO L87 Difference]: Start difference. First operand 1546 states and 2392 transitions. Second operand 4 states. [2020-10-19 18:23:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:30,332 INFO L93 Difference]: Finished difference Result 2091 states and 3209 transitions. [2020-10-19 18:23:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:30,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:23:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:30,342 INFO L225 Difference]: With dead ends: 2091 [2020-10-19 18:23:30,342 INFO L226 Difference]: Without dead ends: 2091 [2020-10-19 18:23:30,343 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 18:23:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2020-10-19 18:23:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2090. [2020-10-19 18:23:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-19 18:23:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3208 transitions. [2020-10-19 18:23:30,393 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3208 transitions. Word has length 28 [2020-10-19 18:23:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:30,394 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3208 transitions. [2020-10-19 18:23:30,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3208 transitions. [2020-10-19 18:23:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:23:30,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:30,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:30,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:23:30,398 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -655478549, now seen corresponding path program 1 times [2020-10-19 18:23:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:30,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255295081] [2020-10-19 18:23:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:30,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:30,444 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 18:23:30,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255295081] [2020-10-19 18:23:30,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:30,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:30,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593056509] [2020-10-19 18:23:30,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:30,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:30,447 INFO L87 Difference]: Start difference. First operand 2090 states and 3208 transitions. Second operand 4 states. [2020-10-19 18:23:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:30,603 INFO L93 Difference]: Finished difference Result 2123 states and 3209 transitions. [2020-10-19 18:23:30,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:30,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:23:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:30,615 INFO L225 Difference]: With dead ends: 2123 [2020-10-19 18:23:30,615 INFO L226 Difference]: Without dead ends: 2123 [2020-10-19 18:23:30,616 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 18:23:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-10-19 18:23:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2122. [2020-10-19 18:23:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2020-10-19 18:23:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3208 transitions. [2020-10-19 18:23:30,681 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3208 transitions. Word has length 29 [2020-10-19 18:23:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:30,682 INFO L481 AbstractCegarLoop]: Abstraction has 2122 states and 3208 transitions. [2020-10-19 18:23:30,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3208 transitions. [2020-10-19 18:23:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:23:30,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:30,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:30,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 18:23:30,686 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:30,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1676546903, now seen corresponding path program 1 times [2020-10-19 18:23:30,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:30,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367198159] [2020-10-19 18:23:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:30,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:30,735 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 18:23:30,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367198159] [2020-10-19 18:23:30,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:30,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:30,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589003417] [2020-10-19 18:23:30,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:30,738 INFO L87 Difference]: Start difference. First operand 2122 states and 3208 transitions. Second operand 4 states. [2020-10-19 18:23:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:30,899 INFO L93 Difference]: Finished difference Result 3723 states and 5673 transitions. [2020-10-19 18:23:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:30,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:23:30,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:30,917 INFO L225 Difference]: With dead ends: 3723 [2020-10-19 18:23:30,917 INFO L226 Difference]: Without dead ends: 3723 [2020-10-19 18:23:30,918 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 18:23:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-10-19 18:23:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3082. [2020-10-19 18:23:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3082 states. [2020-10-19 18:23:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4520 transitions. [2020-10-19 18:23:30,988 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4520 transitions. Word has length 29 [2020-10-19 18:23:30,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:30,989 INFO L481 AbstractCegarLoop]: Abstraction has 3082 states and 4520 transitions. [2020-10-19 18:23:30,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4520 transitions. [2020-10-19 18:23:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:23:30,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:30,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:30,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 18:23:30,994 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1338556715, now seen corresponding path program 1 times [2020-10-19 18:23:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:30,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747493936] [2020-10-19 18:23:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,033 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 18:23:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747493936] [2020-10-19 18:23:31,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:31,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:31,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956642744] [2020-10-19 18:23:31,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:31,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:31,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:31,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:31,036 INFO L87 Difference]: Start difference. First operand 3082 states and 4520 transitions. Second operand 4 states. [2020-10-19 18:23:31,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:31,179 INFO L93 Difference]: Finished difference Result 4107 states and 5961 transitions. [2020-10-19 18:23:31,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:31,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:23:31,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:31,198 INFO L225 Difference]: With dead ends: 4107 [2020-10-19 18:23:31,198 INFO L226 Difference]: Without dead ends: 4107 [2020-10-19 18:23:31,199 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 18:23:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2020-10-19 18:23:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4106. [2020-10-19 18:23:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4106 states. [2020-10-19 18:23:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5960 transitions. [2020-10-19 18:23:31,288 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5960 transitions. Word has length 29 [2020-10-19 18:23:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:31,289 INFO L481 AbstractCegarLoop]: Abstraction has 4106 states and 5960 transitions. [2020-10-19 18:23:31,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5960 transitions. [2020-10-19 18:23:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:23:31,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:31,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:31,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 18:23:31,295 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash -426685595, now seen corresponding path program 1 times [2020-10-19 18:23:31,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:31,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708125969] [2020-10-19 18:23:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,335 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 18:23:31,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708125969] [2020-10-19 18:23:31,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:31,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515398853] [2020-10-19 18:23:31,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:31,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:31,338 INFO L87 Difference]: Start difference. First operand 4106 states and 5960 transitions. Second operand 4 states. [2020-10-19 18:23:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:31,476 INFO L93 Difference]: Finished difference Result 4171 states and 5961 transitions. [2020-10-19 18:23:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:31,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:23:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:31,509 INFO L225 Difference]: With dead ends: 4171 [2020-10-19 18:23:31,509 INFO L226 Difference]: Without dead ends: 4171 [2020-10-19 18:23:31,509 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 18:23:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2020-10-19 18:23:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4170. [2020-10-19 18:23:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-10-19 18:23:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5960 transitions. [2020-10-19 18:23:31,583 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5960 transitions. Word has length 30 [2020-10-19 18:23:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:31,583 INFO L481 AbstractCegarLoop]: Abstraction has 4170 states and 5960 transitions. [2020-10-19 18:23:31,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5960 transitions. [2020-10-19 18:23:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:23:31,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:31,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:31,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 18:23:31,589 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1447753949, now seen corresponding path program 1 times [2020-10-19 18:23:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:31,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431738104] [2020-10-19 18:23:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,629 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 18:23:31,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431738104] [2020-10-19 18:23:31,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:31,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:31,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742437357] [2020-10-19 18:23:31,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:31,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:31,632 INFO L87 Difference]: Start difference. First operand 4170 states and 5960 transitions. Second operand 4 states. [2020-10-19 18:23:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:31,767 INFO L93 Difference]: Finished difference Result 7179 states and 10313 transitions. [2020-10-19 18:23:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:31,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:23:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:31,783 INFO L225 Difference]: With dead ends: 7179 [2020-10-19 18:23:31,783 INFO L226 Difference]: Without dead ends: 7179 [2020-10-19 18:23:31,784 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 18:23:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2020-10-19 18:23:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6154. [2020-10-19 18:23:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6154 states. [2020-10-19 18:23:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 8520 transitions. [2020-10-19 18:23:31,868 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 8520 transitions. Word has length 30 [2020-10-19 18:23:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:31,868 INFO L481 AbstractCegarLoop]: Abstraction has 6154 states and 8520 transitions. [2020-10-19 18:23:31,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 8520 transitions. [2020-10-19 18:23:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:23:31,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:31,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:31,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 18:23:31,877 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1567349669, now seen corresponding path program 1 times [2020-10-19 18:23:31,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:31,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400196863] [2020-10-19 18:23:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:31,936 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 18:23:31,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400196863] [2020-10-19 18:23:31,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:31,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:31,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334166815] [2020-10-19 18:23:31,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:31,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:31,942 INFO L87 Difference]: Start difference. First operand 6154 states and 8520 transitions. Second operand 4 states. [2020-10-19 18:23:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:32,104 INFO L93 Difference]: Finished difference Result 8075 states and 11017 transitions. [2020-10-19 18:23:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:32,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-19 18:23:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:32,120 INFO L225 Difference]: With dead ends: 8075 [2020-10-19 18:23:32,120 INFO L226 Difference]: Without dead ends: 8075 [2020-10-19 18:23:32,121 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 18:23:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2020-10-19 18:23:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8074. [2020-10-19 18:23:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8074 states. [2020-10-19 18:23:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8074 states to 8074 states and 11016 transitions. [2020-10-19 18:23:32,221 INFO L78 Accepts]: Start accepts. Automaton has 8074 states and 11016 transitions. Word has length 30 [2020-10-19 18:23:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:32,222 INFO L481 AbstractCegarLoop]: Abstraction has 8074 states and 11016 transitions. [2020-10-19 18:23:32,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8074 states and 11016 transitions. [2020-10-19 18:23:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:23:32,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:32,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:32,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 18:23:32,232 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1924028042, now seen corresponding path program 1 times [2020-10-19 18:23:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:32,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96434055] [2020-10-19 18:23:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:32,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:32,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96434055] [2020-10-19 18:23:32,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:32,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:32,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820225409] [2020-10-19 18:23:32,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:32,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:32,276 INFO L87 Difference]: Start difference. First operand 8074 states and 11016 transitions. Second operand 4 states. [2020-10-19 18:23:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:32,414 INFO L93 Difference]: Finished difference Result 8203 states and 11017 transitions. [2020-10-19 18:23:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:32,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-19 18:23:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:32,430 INFO L225 Difference]: With dead ends: 8203 [2020-10-19 18:23:32,431 INFO L226 Difference]: Without dead ends: 8203 [2020-10-19 18:23:32,431 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 18:23:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-10-19 18:23:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8202. [2020-10-19 18:23:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8202 states. [2020-10-19 18:23:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11016 transitions. [2020-10-19 18:23:32,623 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11016 transitions. Word has length 31 [2020-10-19 18:23:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:32,624 INFO L481 AbstractCegarLoop]: Abstraction has 8202 states and 11016 transitions. [2020-10-19 18:23:32,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11016 transitions. [2020-10-19 18:23:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:23:32,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:32,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:32,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-19 18:23:32,635 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1349870900, now seen corresponding path program 1 times [2020-10-19 18:23:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:32,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723193375] [2020-10-19 18:23:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:32,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:32,677 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 18:23:32,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723193375] [2020-10-19 18:23:32,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:32,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:32,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137924999] [2020-10-19 18:23:32,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:32,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:32,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:32,679 INFO L87 Difference]: Start difference. First operand 8202 states and 11016 transitions. Second operand 4 states. [2020-10-19 18:23:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:32,825 INFO L93 Difference]: Finished difference Result 13835 states and 18569 transitions. [2020-10-19 18:23:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:32,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-19 18:23:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:32,854 INFO L225 Difference]: With dead ends: 13835 [2020-10-19 18:23:32,855 INFO L226 Difference]: Without dead ends: 13835 [2020-10-19 18:23:32,855 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 18:23:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2020-10-19 18:23:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12298. [2020-10-19 18:23:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2020-10-19 18:23:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 16008 transitions. [2020-10-19 18:23:33,029 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 16008 transitions. Word has length 31 [2020-10-19 18:23:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:33,030 INFO L481 AbstractCegarLoop]: Abstraction has 12298 states and 16008 transitions. [2020-10-19 18:23:33,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 16008 transitions. [2020-10-19 18:23:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:23:33,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:33,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:33,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-19 18:23:33,047 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash 70007222, now seen corresponding path program 1 times [2020-10-19 18:23:33,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:33,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754420798] [2020-10-19 18:23:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:33,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:33,098 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 18:23:33,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754420798] [2020-10-19 18:23:33,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:33,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:33,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626247579] [2020-10-19 18:23:33,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:33,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:33,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:33,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:33,101 INFO L87 Difference]: Start difference. First operand 12298 states and 16008 transitions. Second operand 4 states. [2020-10-19 18:23:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:33,258 INFO L93 Difference]: Finished difference Result 15883 states and 20233 transitions. [2020-10-19 18:23:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:33,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-19 18:23:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:33,282 INFO L225 Difference]: With dead ends: 15883 [2020-10-19 18:23:33,282 INFO L226 Difference]: Without dead ends: 15883 [2020-10-19 18:23:33,283 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 18:23:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2020-10-19 18:23:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15882. [2020-10-19 18:23:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-19 18:23:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 20232 transitions. [2020-10-19 18:23:33,477 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 20232 transitions. Word has length 31 [2020-10-19 18:23:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:33,477 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 20232 transitions. [2020-10-19 18:23:33,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 20232 transitions. [2020-10-19 18:23:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:23:33,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:33,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:33,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-19 18:23:33,495 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1096993072, now seen corresponding path program 1 times [2020-10-19 18:23:33,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:33,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96773777] [2020-10-19 18:23:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:33,539 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 18:23:33,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96773777] [2020-10-19 18:23:33,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:33,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:33,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055583778] [2020-10-19 18:23:33,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:33,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:33,541 INFO L87 Difference]: Start difference. First operand 15882 states and 20232 transitions. Second operand 4 states. [2020-10-19 18:23:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:33,693 INFO L93 Difference]: Finished difference Result 16139 states and 20233 transitions. [2020-10-19 18:23:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:33,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 18:23:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:33,716 INFO L225 Difference]: With dead ends: 16139 [2020-10-19 18:23:33,716 INFO L226 Difference]: Without dead ends: 16139 [2020-10-19 18:23:33,717 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 18:23:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2020-10-19 18:23:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16138. [2020-10-19 18:23:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-10-19 18:23:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20232 transitions. [2020-10-19 18:23:33,974 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20232 transitions. Word has length 32 [2020-10-19 18:23:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:33,975 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20232 transitions. [2020-10-19 18:23:33,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20232 transitions. [2020-10-19 18:23:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:23:33,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:33,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:33,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-19 18:23:33,993 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2118061426, now seen corresponding path program 1 times [2020-10-19 18:23:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:33,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181746490] [2020-10-19 18:23:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:34,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:34,033 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 18:23:34,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181746490] [2020-10-19 18:23:34,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:34,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:34,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111735514] [2020-10-19 18:23:34,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:34,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:34,035 INFO L87 Difference]: Start difference. First operand 16138 states and 20232 transitions. Second operand 4 states. [2020-10-19 18:23:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:34,211 INFO L93 Difference]: Finished difference Result 31243 states and 37385 transitions. [2020-10-19 18:23:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:34,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 18:23:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:34,254 INFO L225 Difference]: With dead ends: 31243 [2020-10-19 18:23:34,255 INFO L226 Difference]: Without dead ends: 31243 [2020-10-19 18:23:34,255 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 18:23:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2020-10-19 18:23:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31242. [2020-10-19 18:23:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-19 18:23:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 37384 transitions. [2020-10-19 18:23:34,699 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 37384 transitions. Word has length 32 [2020-10-19 18:23:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:34,700 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 37384 transitions. [2020-10-19 18:23:34,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 37384 transitions. [2020-10-19 18:23:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:23:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:34,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:34,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-19 18:23:34,750 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash -838197748, now seen corresponding path program 1 times [2020-10-19 18:23:34,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:34,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291817995] [2020-10-19 18:23:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:34,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:34,791 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 18:23:34,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291817995] [2020-10-19 18:23:34,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:34,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:34,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680289528] [2020-10-19 18:23:34,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:34,794 INFO L87 Difference]: Start difference. First operand 31242 states and 37384 transitions. Second operand 4 states. [2020-10-19 18:23:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:34,993 INFO L93 Difference]: Finished difference Result 33291 states and 39945 transitions. [2020-10-19 18:23:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:34,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-19 18:23:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:35,032 INFO L225 Difference]: With dead ends: 33291 [2020-10-19 18:23:35,032 INFO L226 Difference]: Without dead ends: 33291 [2020-10-19 18:23:35,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2020-10-19 18:23:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31242. [2020-10-19 18:23:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31242 states. [2020-10-19 18:23:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 36872 transitions. [2020-10-19 18:23:35,645 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 36872 transitions. Word has length 32 [2020-10-19 18:23:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:35,646 INFO L481 AbstractCegarLoop]: Abstraction has 31242 states and 36872 transitions. [2020-10-19 18:23:35,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 36872 transitions. [2020-10-19 18:23:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:23:35,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:35,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:35,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-19 18:23:35,667 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:35,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1228702207, now seen corresponding path program 1 times [2020-10-19 18:23:35,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:35,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792467778] [2020-10-19 18:23:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:35,716 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 18:23:35,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792467778] [2020-10-19 18:23:35,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:35,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:35,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104715935] [2020-10-19 18:23:35,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:35,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:35,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:35,719 INFO L87 Difference]: Start difference. First operand 31242 states and 36872 transitions. Second operand 4 states. [2020-10-19 18:23:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:35,931 INFO L93 Difference]: Finished difference Result 50698 states and 58376 transitions. [2020-10-19 18:23:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:35,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-19 18:23:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:35,989 INFO L225 Difference]: With dead ends: 50698 [2020-10-19 18:23:35,989 INFO L226 Difference]: Without dead ends: 50698 [2020-10-19 18:23:35,990 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 18:23:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50698 states. [2020-10-19 18:23:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50698 to 48650. [2020-10-19 18:23:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48650 states. [2020-10-19 18:23:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48650 states to 48650 states and 56328 transitions. [2020-10-19 18:23:36,648 INFO L78 Accepts]: Start accepts. Automaton has 48650 states and 56328 transitions. Word has length 33 [2020-10-19 18:23:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:36,648 INFO L481 AbstractCegarLoop]: Abstraction has 48650 states and 56328 transitions. [2020-10-19 18:23:36,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 48650 states and 56328 transitions. [2020-10-19 18:23:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 18:23:36,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:36,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:36,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-19 18:23:36,691 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1786401411, now seen corresponding path program 1 times [2020-10-19 18:23:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:36,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118701600] [2020-10-19 18:23:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:36,734 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 18:23:36,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118701600] [2020-10-19 18:23:36,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:36,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:36,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921455541] [2020-10-19 18:23:36,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:36,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:36,736 INFO L87 Difference]: Start difference. First operand 48650 states and 56328 transitions. Second operand 4 states. [2020-10-19 18:23:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:36,957 INFO L93 Difference]: Finished difference Result 60935 states and 67590 transitions. [2020-10-19 18:23:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:36,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-19 18:23:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:36,958 INFO L225 Difference]: With dead ends: 60935 [2020-10-19 18:23:36,958 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:23:36,959 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 18:23:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:23:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:23:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:23:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:23:36,959 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-10-19 18:23:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:36,959 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:23:36,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:23:36,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:23:36,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-19 18:23:36,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:23:36 BoogieIcfgContainer [2020-10-19 18:23:36,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:23:36,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:23:36,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:23:36,966 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:23:36,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:25" (3/4) ... [2020-10-19 18:23:36,970 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:23:36,978 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:23:36,978 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:23:36,979 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:23:36,986 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:23:36,987 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:23:36,987 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:23:36,988 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:23:37,053 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:23:37,054 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:23:37,056 INFO L168 Benchmark]: Toolchain (without parser) took 12384.80 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 396.9 MB). Free memory was 958.6 MB in the beginning and 635.5 MB in the end (delta: 323.1 MB). Peak memory consumption was 720.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:37,057 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:37,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.5 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -94.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:37,058 INFO L168 Benchmark]: Boogie Preprocessor took 42.30 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:23:37,058 INFO L168 Benchmark]: RCFGBuilder took 431.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:37,059 INFO L168 Benchmark]: TraceAbstraction took 11376.26 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 332.4 MB). Free memory was 1.0 GB in the beginning and 648.4 MB in the end (delta: 375.6 MB). Peak memory consumption was 708.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:37,059 INFO L168 Benchmark]: Witness Printer took 88.82 ms. Allocated memory is still 1.4 GB. Free memory was 648.4 MB in the beginning and 635.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:23:37,062 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 434.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.5 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -94.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 42.30 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 431.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11376.26 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 332.4 MB). Free memory was 1.0 GB in the beginning and 648.4 MB in the end (delta: 375.6 MB). Peak memory consumption was 708.0 MB. Max. memory is 11.5 GB. * Witness Printer took 88.82 ms. Allocated memory is still 1.4 GB. Free memory was 648.4 MB in the beginning and 635.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 53 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2900 SDtfs, 4219 SDslu, 232 SDs, 0 SdLazy, 2029 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48650occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 31 MinimizatonAttempts, 8194 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 852 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 821 ConstructedInterpolants, 0 QuantifiedInterpolants, 67886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...