./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_9.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_9.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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:23:53,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:23:53,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:23:53,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:23:53,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:23:53,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:23:53,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:23:53,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:23:53,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:23:53,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:23:53,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:23:53,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:23:53,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:23:53,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:23:53,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:23:53,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:23:53,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:23:53,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:23:53,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:23:53,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:23:53,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:23:53,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:23:53,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:23:53,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:23:53,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:23:53,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:23:53,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:23:53,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:23:53,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:23:53,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:23:53,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:23:53,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:23:53,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:23:53,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:23:53,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:23:53,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:23:53,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:23:53,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:23:53,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:23:53,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:23:53,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:23:53,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:23:53,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:23:53,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:23:53,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:23:53,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:23:53,916 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:23:53,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:23:53,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:23:53,917 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:23:53,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:23:53,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:23:53,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:23:53,922 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:23:53,922 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:23:53,923 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:23:53,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:23:53,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:23:53,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:23:53,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:23:53,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:23:53,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:23:53,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:23:53,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:23:53,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:53,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:23:53,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:23:53,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:23:53,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:23:53,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:23:53,930 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 -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2020-10-19 18:23:54,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:23:54,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:23:54,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:23:54,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:23:54,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:23:54,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_9.c [2020-10-19 18:23:54,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05bd07fad/1af949e9251044fdb179a39b3e607485/FLAG5ba317e27 [2020-10-19 18:23:54,807 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:23:54,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c [2020-10-19 18:23:54,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05bd07fad/1af949e9251044fdb179a39b3e607485/FLAG5ba317e27 [2020-10-19 18:23:55,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05bd07fad/1af949e9251044fdb179a39b3e607485 [2020-10-19 18:23:55,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:23:55,191 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:23:55,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:55,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:23:55,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:23:55,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8506a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55, skipping insertion in model container [2020-10-19 18:23:55,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:23:55,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:23:55,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:55,441 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:23:55,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:23:55,559 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:23:55,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55 WrapperNode [2020-10-19 18:23:55,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:23:55,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:23:55,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:23:55,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:23:55,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... [2020-10-19 18:23:55,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:23:55,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:23:55,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:23:55,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:23:55,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:23:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:23:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:23:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:23:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:23:55,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:23:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:23:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:23:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:23:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:23:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:23:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:23:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:23:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:23:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:23:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:23:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:23:56,078 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:23:56,078 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:23:56,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:56 BoogieIcfgContainer [2020-10-19 18:23:56,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:23:56,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:23:56,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:23:56,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:23:56,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:23:55" (1/3) ... [2020-10-19 18:23:56,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ce155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:56, skipping insertion in model container [2020-10-19 18:23:56,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:23:55" (2/3) ... [2020-10-19 18:23:56,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ce155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:23:56, skipping insertion in model container [2020-10-19 18:23:56,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:56" (3/3) ... [2020-10-19 18:23:56,090 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-10-19 18:23:56,103 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:23:56,111 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-19 18:23:56,126 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-19 18:23:56,148 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:23:56,149 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:23:56,149 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:23:56,149 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:23:56,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:23:56,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:23:56,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:23:56,150 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:23:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-19 18:23:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:23:56,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,177 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -693527066, now seen corresponding path program 1 times [2020-10-19 18:23:56,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227295041] [2020-10-19 18:23:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227295041] [2020-10-19 18:23:56,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:23:56,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383814411] [2020-10-19 18:23:56,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:23:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:23:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:56,485 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-19 18:23:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,535 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2020-10-19 18:23:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:23:56,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:23:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,549 INFO L225 Difference]: With dead ends: 43 [2020-10-19 18:23:56,549 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 18:23:56,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:23:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 18:23:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-19 18:23:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 18:23:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2020-10-19 18:23:56,593 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 9 [2020-10-19 18:23:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,593 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2020-10-19 18:23:56,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:23:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2020-10-19 18:23:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:56,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:23:56,595 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash 838313058, now seen corresponding path program 1 times [2020-10-19 18:23:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730060340] [2020-10-19 18:23:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:56,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730060340] [2020-10-19 18:23:56,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:56,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547597397] [2020-10-19 18:23:56,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:56,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:56,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:56,717 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand 4 states. [2020-10-19 18:23:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:56,907 INFO L93 Difference]: Finished difference Result 67 states and 118 transitions. [2020-10-19 18:23:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:56,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:56,910 INFO L225 Difference]: With dead ends: 67 [2020-10-19 18:23:56,910 INFO L226 Difference]: Without dead ends: 67 [2020-10-19 18:23:56,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-19 18:23:56,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-19 18:23:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-19 18:23:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 83 transitions. [2020-10-19 18:23:56,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 83 transitions. Word has length 21 [2020-10-19 18:23:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:56,922 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 83 transitions. [2020-10-19 18:23:56,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 83 transitions. [2020-10-19 18:23:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:23:56,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:56,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:56,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:23:56,925 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 251507044, now seen corresponding path program 1 times [2020-10-19 18:23:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:56,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238861261] [2020-10-19 18:23:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,016 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 18:23:57,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238861261] [2020-10-19 18:23:57,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022063672] [2020-10-19 18:23:57,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,020 INFO L87 Difference]: Start difference. First operand 48 states and 83 transitions. Second operand 4 states. [2020-10-19 18:23:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,186 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2020-10-19 18:23:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-19 18:23:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,188 INFO L225 Difference]: With dead ends: 67 [2020-10-19 18:23:57,188 INFO L226 Difference]: Without dead ends: 67 [2020-10-19 18:23:57,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-19 18:23:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-19 18:23:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-19 18:23:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 115 transitions. [2020-10-19 18:23:57,199 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 115 transitions. Word has length 21 [2020-10-19 18:23:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,199 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 115 transitions. [2020-10-19 18:23:57,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 115 transitions. [2020-10-19 18:23:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:23:57,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash 224518530, now seen corresponding path program 1 times [2020-10-19 18:23:57,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720085232] [2020-10-19 18:23:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720085232] [2020-10-19 18:23:57,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103083104] [2020-10-19 18:23:57,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,324 INFO L87 Difference]: Start difference. First operand 66 states and 115 transitions. Second operand 4 states. [2020-10-19 18:23:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,490 INFO L93 Difference]: Finished difference Result 70 states and 118 transitions. [2020-10-19 18:23:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,492 INFO L225 Difference]: With dead ends: 70 [2020-10-19 18:23:57,493 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 18:23:57,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 18:23:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-19 18:23:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-19 18:23:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2020-10-19 18:23:57,501 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 22 [2020-10-19 18:23:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,502 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2020-10-19 18:23:57,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2020-10-19 18:23:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:23:57,504 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,505 INFO L82 PathProgramCache]: Analyzing trace with hash -786598720, now seen corresponding path program 1 times [2020-10-19 18:23:57,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653895440] [2020-10-19 18:23:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653895440] [2020-10-19 18:23:57,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768239555] [2020-10-19 18:23:57,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,572 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 4 states. [2020-10-19 18:23:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,720 INFO L93 Difference]: Finished difference Result 125 states and 215 transitions. [2020-10-19 18:23:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,722 INFO L225 Difference]: With dead ends: 125 [2020-10-19 18:23:57,722 INFO L226 Difference]: Without dead ends: 125 [2020-10-19 18:23:57,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-19 18:23:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-19 18:23:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-19 18:23:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2020-10-19 18:23:57,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 22 [2020-10-19 18:23:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,735 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2020-10-19 18:23:57,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2020-10-19 18:23:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:23:57,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:23:57,738 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -199792706, now seen corresponding path program 1 times [2020-10-19 18:23:57,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810480829] [2020-10-19 18:23:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:57,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810480829] [2020-10-19 18:23:57,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:57,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:57,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162318906] [2020-10-19 18:23:57,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:57,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:57,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:57,805 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand 4 states. [2020-10-19 18:23:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:57,940 INFO L93 Difference]: Finished difference Result 157 states and 273 transitions. [2020-10-19 18:23:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:57,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-19 18:23:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:57,943 INFO L225 Difference]: With dead ends: 157 [2020-10-19 18:23:57,943 INFO L226 Difference]: Without dead ends: 157 [2020-10-19 18:23:57,943 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 18:23:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-19 18:23:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-10-19 18:23:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-19 18:23:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 212 transitions. [2020-10-19 18:23:57,954 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 212 transitions. Word has length 22 [2020-10-19 18:23:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:57,954 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 212 transitions. [2020-10-19 18:23:57,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 212 transitions. [2020-10-19 18:23:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:57,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:57,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:57,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:23:57,956 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1391871535, now seen corresponding path program 1 times [2020-10-19 18:23:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:57,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161302740] [2020-10-19 18:23:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161302740] [2020-10-19 18:23:58,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648434511] [2020-10-19 18:23:58,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,021 INFO L87 Difference]: Start difference. First operand 124 states and 212 transitions. Second operand 4 states. [2020-10-19 18:23:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,160 INFO L93 Difference]: Finished difference Result 225 states and 391 transitions. [2020-10-19 18:23:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,162 INFO L225 Difference]: With dead ends: 225 [2020-10-19 18:23:58,163 INFO L226 Difference]: Without dead ends: 225 [2020-10-19 18:23:58,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-19 18:23:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2020-10-19 18:23:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-19 18:23:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 286 transitions. [2020-10-19 18:23:58,174 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 286 transitions. Word has length 23 [2020-10-19 18:23:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,175 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 286 transitions. [2020-10-19 18:23:58,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 286 transitions. [2020-10-19 18:23:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:23:58,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:23:58,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash 805065521, now seen corresponding path program 1 times [2020-10-19 18:23:58,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732887552] [2020-10-19 18:23:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732887552] [2020-10-19 18:23:58,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610272688] [2020-10-19 18:23:58,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,243 INFO L87 Difference]: Start difference. First operand 168 states and 286 transitions. Second operand 4 states. [2020-10-19 18:23:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,365 INFO L93 Difference]: Finished difference Result 233 states and 393 transitions. [2020-10-19 18:23:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 18:23:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,367 INFO L225 Difference]: With dead ends: 233 [2020-10-19 18:23:58,367 INFO L226 Difference]: Without dead ends: 233 [2020-10-19 18:23:58,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-19 18:23:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-19 18:23:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-19 18:23:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 392 transitions. [2020-10-19 18:23:58,379 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 392 transitions. Word has length 23 [2020-10-19 18:23:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,379 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 392 transitions. [2020-10-19 18:23:58,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 392 transitions. [2020-10-19 18:23:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:23:58,382 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash 204983275, now seen corresponding path program 1 times [2020-10-19 18:23:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956895035] [2020-10-19 18:23:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956895035] [2020-10-19 18:23:58,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902227634] [2020-10-19 18:23:58,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,444 INFO L87 Difference]: Start difference. First operand 232 states and 392 transitions. Second operand 4 states. [2020-10-19 18:23:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,590 INFO L93 Difference]: Finished difference Result 239 states and 397 transitions. [2020-10-19 18:23:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,593 INFO L225 Difference]: With dead ends: 239 [2020-10-19 18:23:58,593 INFO L226 Difference]: Without dead ends: 239 [2020-10-19 18:23:58,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-19 18:23:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2020-10-19 18:23:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-19 18:23:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 396 transitions. [2020-10-19 18:23:58,617 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 396 transitions. Word has length 24 [2020-10-19 18:23:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,618 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 396 transitions. [2020-10-19 18:23:58,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 396 transitions. [2020-10-19 18:23:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:23:58,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -806133975, now seen corresponding path program 1 times [2020-10-19 18:23:58,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479607114] [2020-10-19 18:23:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479607114] [2020-10-19 18:23:58,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394674563] [2020-10-19 18:23:58,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,679 INFO L87 Difference]: Start difference. First operand 238 states and 396 transitions. Second operand 4 states. [2020-10-19 18:23:58,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,791 INFO L93 Difference]: Finished difference Result 427 states and 717 transitions. [2020-10-19 18:23:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,795 INFO L225 Difference]: With dead ends: 427 [2020-10-19 18:23:58,795 INFO L226 Difference]: Without dead ends: 427 [2020-10-19 18:23:58,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-19 18:23:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 330. [2020-10-19 18:23:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-19 18:23:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 540 transitions. [2020-10-19 18:23:58,807 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 540 transitions. Word has length 24 [2020-10-19 18:23:58,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:58,807 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 540 transitions. [2020-10-19 18:23:58,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 540 transitions. [2020-10-19 18:23:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 18:23:58,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:58,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:58,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:23:58,810 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1392939989, now seen corresponding path program 1 times [2020-10-19 18:23:58,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:58,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998639715] [2020-10-19 18:23:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:58,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998639715] [2020-10-19 18:23:58,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:58,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:58,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846819983] [2020-10-19 18:23:58,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:58,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:58,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:58,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:58,871 INFO L87 Difference]: Start difference. First operand 330 states and 540 transitions. Second operand 4 states. [2020-10-19 18:23:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:58,990 INFO L93 Difference]: Finished difference Result 451 states and 729 transitions. [2020-10-19 18:23:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:58,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-19 18:23:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:58,994 INFO L225 Difference]: With dead ends: 451 [2020-10-19 18:23:58,994 INFO L226 Difference]: Without dead ends: 451 [2020-10-19 18:23:58,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-19 18:23:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2020-10-19 18:23:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-19 18:23:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 728 transitions. [2020-10-19 18:23:59,008 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 728 transitions. Word has length 24 [2020-10-19 18:23:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,008 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 728 transitions. [2020-10-19 18:23:59,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 728 transitions. [2020-10-19 18:23:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:23:59,011 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash 786299772, now seen corresponding path program 1 times [2020-10-19 18:23:59,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562525640] [2020-10-19 18:23:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562525640] [2020-10-19 18:23:59,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099077028] [2020-10-19 18:23:59,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,069 INFO L87 Difference]: Start difference. First operand 450 states and 728 transitions. Second operand 4 states. [2020-10-19 18:23:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,179 INFO L93 Difference]: Finished difference Result 459 states and 729 transitions. [2020-10-19 18:23:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,182 INFO L225 Difference]: With dead ends: 459 [2020-10-19 18:23:59,182 INFO L226 Difference]: Without dead ends: 459 [2020-10-19 18:23:59,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-19 18:23:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2020-10-19 18:23:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-19 18:23:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 728 transitions. [2020-10-19 18:23:59,193 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 728 transitions. Word has length 25 [2020-10-19 18:23:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,194 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 728 transitions. [2020-10-19 18:23:59,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 728 transitions. [2020-10-19 18:23:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:23:59,196 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash -224817478, now seen corresponding path program 1 times [2020-10-19 18:23:59,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510515803] [2020-10-19 18:23:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510515803] [2020-10-19 18:23:59,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783002229] [2020-10-19 18:23:59,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,241 INFO L87 Difference]: Start difference. First operand 458 states and 728 transitions. Second operand 4 states. [2020-10-19 18:23:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,358 INFO L93 Difference]: Finished difference Result 811 states and 1297 transitions. [2020-10-19 18:23:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,363 INFO L225 Difference]: With dead ends: 811 [2020-10-19 18:23:59,364 INFO L226 Difference]: Without dead ends: 811 [2020-10-19 18:23:59,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-10-19 18:23:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 650. [2020-10-19 18:23:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-19 18:23:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1008 transitions. [2020-10-19 18:23:59,380 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1008 transitions. Word has length 25 [2020-10-19 18:23:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,381 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 1008 transitions. [2020-10-19 18:23:59,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1008 transitions. [2020-10-19 18:23:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:23:59,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:23:59,384 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash -811623492, now seen corresponding path program 1 times [2020-10-19 18:23:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151795402] [2020-10-19 18:23:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151795402] [2020-10-19 18:23:59,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957737884] [2020-10-19 18:23:59,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,433 INFO L87 Difference]: Start difference. First operand 650 states and 1008 transitions. Second operand 4 states. [2020-10-19 18:23:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,562 INFO L93 Difference]: Finished difference Result 875 states and 1337 transitions. [2020-10-19 18:23:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-19 18:23:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,567 INFO L225 Difference]: With dead ends: 875 [2020-10-19 18:23:59,567 INFO L226 Difference]: Without dead ends: 875 [2020-10-19 18:23:59,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2020-10-19 18:23:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2020-10-19 18:23:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-19 18:23:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1336 transitions. [2020-10-19 18:23:59,586 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1336 transitions. Word has length 25 [2020-10-19 18:23:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,587 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1336 transitions. [2020-10-19 18:23:59,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1336 transitions. [2020-10-19 18:23:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:59,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:23:59,589 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1627252566, now seen corresponding path program 1 times [2020-10-19 18:23:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928347326] [2020-10-19 18:23:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928347326] [2020-10-19 18:23:59,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68143935] [2020-10-19 18:23:59,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,635 INFO L87 Difference]: Start difference. First operand 874 states and 1336 transitions. Second operand 4 states. [2020-10-19 18:23:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,756 INFO L93 Difference]: Finished difference Result 891 states and 1337 transitions. [2020-10-19 18:23:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,761 INFO L225 Difference]: With dead ends: 891 [2020-10-19 18:23:59,761 INFO L226 Difference]: Without dead ends: 891 [2020-10-19 18:23:59,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-10-19 18:23:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 890. [2020-10-19 18:23:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2020-10-19 18:23:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1336 transitions. [2020-10-19 18:23:59,781 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1336 transitions. Word has length 26 [2020-10-19 18:23:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,782 INFO L481 AbstractCegarLoop]: Abstraction has 890 states and 1336 transitions. [2020-10-19 18:23:59,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1336 transitions. [2020-10-19 18:23:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:59,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 18:23:59,784 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash 616135316, now seen corresponding path program 1 times [2020-10-19 18:23:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77205446] [2020-10-19 18:23:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:23:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:23:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:23:59,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77205446] [2020-10-19 18:23:59,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:23:59,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:23:59,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89242932] [2020-10-19 18:23:59,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:23:59,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:23:59,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:23:59,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:23:59,829 INFO L87 Difference]: Start difference. First operand 890 states and 1336 transitions. Second operand 4 states. [2020-10-19 18:23:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:23:59,947 INFO L93 Difference]: Finished difference Result 1547 states and 2329 transitions. [2020-10-19 18:23:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:23:59,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:23:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:23:59,955 INFO L225 Difference]: With dead ends: 1547 [2020-10-19 18:23:59,955 INFO L226 Difference]: Without dead ends: 1547 [2020-10-19 18:23:59,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:23:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-19 18:23:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1290. [2020-10-19 18:23:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-10-19 18:23:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1880 transitions. [2020-10-19 18:23:59,987 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1880 transitions. Word has length 26 [2020-10-19 18:23:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:23:59,988 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1880 transitions. [2020-10-19 18:23:59,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:23:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1880 transitions. [2020-10-19 18:23:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 18:23:59,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:23:59,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:23:59,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:23:59,991 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:23:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:23:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash 29329302, now seen corresponding path program 1 times [2020-10-19 18:23:59,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:23:59,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761572334] [2020-10-19 18:23:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:23:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,033 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 18:24:00,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761572334] [2020-10-19 18:24:00,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187555389] [2020-10-19 18:24:00,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,035 INFO L87 Difference]: Start difference. First operand 1290 states and 1880 transitions. Second operand 4 states. [2020-10-19 18:24:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:00,164 INFO L93 Difference]: Finished difference Result 1707 states and 2441 transitions. [2020-10-19 18:24:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:00,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-19 18:24:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:00,174 INFO L225 Difference]: With dead ends: 1707 [2020-10-19 18:24:00,174 INFO L226 Difference]: Without dead ends: 1707 [2020-10-19 18:24:00,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-10-19 18:24:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1706. [2020-10-19 18:24:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2020-10-19 18:24:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2440 transitions. [2020-10-19 18:24:00,226 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2440 transitions. Word has length 26 [2020-10-19 18:24:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,227 INFO L481 AbstractCegarLoop]: Abstraction has 1706 states and 2440 transitions. [2020-10-19 18:24:00,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2440 transitions. [2020-10-19 18:24:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:00,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:24:00,230 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1926995975, now seen corresponding path program 1 times [2020-10-19 18:24:00,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225293176] [2020-10-19 18:24:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225293176] [2020-10-19 18:24:00,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696586853] [2020-10-19 18:24:00,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,281 INFO L87 Difference]: Start difference. First operand 1706 states and 2440 transitions. Second operand 4 states. [2020-10-19 18:24:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:00,408 INFO L93 Difference]: Finished difference Result 1739 states and 2441 transitions. [2020-10-19 18:24:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:00,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:24:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:00,419 INFO L225 Difference]: With dead ends: 1739 [2020-10-19 18:24:00,420 INFO L226 Difference]: Without dead ends: 1739 [2020-10-19 18:24:00,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-10-19 18:24:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1738. [2020-10-19 18:24:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1738 states. [2020-10-19 18:24:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2440 transitions. [2020-10-19 18:24:00,491 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2440 transitions. Word has length 27 [2020-10-19 18:24:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,492 INFO L481 AbstractCegarLoop]: Abstraction has 1738 states and 2440 transitions. [2020-10-19 18:24:00,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2440 transitions. [2020-10-19 18:24:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:00,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 18:24:00,498 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash 915878725, now seen corresponding path program 1 times [2020-10-19 18:24:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926354498] [2020-10-19 18:24:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926354498] [2020-10-19 18:24:00,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980369039] [2020-10-19 18:24:00,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,584 INFO L87 Difference]: Start difference. First operand 1738 states and 2440 transitions. Second operand 4 states. [2020-10-19 18:24:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:00,767 INFO L93 Difference]: Finished difference Result 2955 states and 4137 transitions. [2020-10-19 18:24:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:00,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:24:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:00,783 INFO L225 Difference]: With dead ends: 2955 [2020-10-19 18:24:00,784 INFO L226 Difference]: Without dead ends: 2955 [2020-10-19 18:24:00,784 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 18:24:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-19 18:24:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2570. [2020-10-19 18:24:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2570 states. [2020-10-19 18:24:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3496 transitions. [2020-10-19 18:24:00,888 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3496 transitions. Word has length 27 [2020-10-19 18:24:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:00,888 INFO L481 AbstractCegarLoop]: Abstraction has 2570 states and 3496 transitions. [2020-10-19 18:24:00,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3496 transitions. [2020-10-19 18:24:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:00,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:00,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:00,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 18:24:00,893 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash 329072711, now seen corresponding path program 1 times [2020-10-19 18:24:00,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:00,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838593603] [2020-10-19 18:24:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:00,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838593603] [2020-10-19 18:24:00,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:00,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:00,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793396392] [2020-10-19 18:24:00,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:00,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:00,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:00,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:00,944 INFO L87 Difference]: Start difference. First operand 2570 states and 3496 transitions. Second operand 4 states. [2020-10-19 18:24:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:01,067 INFO L93 Difference]: Finished difference Result 3339 states and 4425 transitions. [2020-10-19 18:24:01,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:01,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-19 18:24:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:01,082 INFO L225 Difference]: With dead ends: 3339 [2020-10-19 18:24:01,082 INFO L226 Difference]: Without dead ends: 3339 [2020-10-19 18:24:01,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-19 18:24:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2020-10-19 18:24:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3338 states. [2020-10-19 18:24:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4424 transitions. [2020-10-19 18:24:01,164 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4424 transitions. Word has length 27 [2020-10-19 18:24:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:01,165 INFO L481 AbstractCegarLoop]: Abstraction has 3338 states and 4424 transitions. [2020-10-19 18:24:01,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4424 transitions. [2020-10-19 18:24:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:24:01,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:01,172 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 18:24:01,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 18:24:01,173 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:01,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1665849663, now seen corresponding path program 1 times [2020-10-19 18:24:01,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:01,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786213202] [2020-10-19 18:24:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:01,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786213202] [2020-10-19 18:24:01,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:01,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:01,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106421920] [2020-10-19 18:24:01,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:01,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:01,218 INFO L87 Difference]: Start difference. First operand 3338 states and 4424 transitions. Second operand 4 states. [2020-10-19 18:24:01,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:01,329 INFO L93 Difference]: Finished difference Result 3403 states and 4425 transitions. [2020-10-19 18:24:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:01,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:24:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:01,343 INFO L225 Difference]: With dead ends: 3403 [2020-10-19 18:24:01,344 INFO L226 Difference]: Without dead ends: 3403 [2020-10-19 18:24:01,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2020-10-19 18:24:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3402. [2020-10-19 18:24:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3402 states. [2020-10-19 18:24:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4424 transitions. [2020-10-19 18:24:01,417 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4424 transitions. Word has length 28 [2020-10-19 18:24:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:01,417 INFO L481 AbstractCegarLoop]: Abstraction has 3402 states and 4424 transitions. [2020-10-19 18:24:01,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4424 transitions. [2020-10-19 18:24:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:24:01,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:01,421 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 18:24:01,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 18:24:01,422 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:01,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:01,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1618000383, now seen corresponding path program 1 times [2020-10-19 18:24:01,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:01,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592179488] [2020-10-19 18:24:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:01,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592179488] [2020-10-19 18:24:01,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:01,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374367402] [2020-10-19 18:24:01,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:01,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:01,469 INFO L87 Difference]: Start difference. First operand 3402 states and 4424 transitions. Second operand 4 states. [2020-10-19 18:24:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:01,595 INFO L93 Difference]: Finished difference Result 5643 states and 7241 transitions. [2020-10-19 18:24:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:01,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:24:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:01,618 INFO L225 Difference]: With dead ends: 5643 [2020-10-19 18:24:01,618 INFO L226 Difference]: Without dead ends: 5643 [2020-10-19 18:24:01,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2020-10-19 18:24:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5130. [2020-10-19 18:24:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2020-10-19 18:24:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6472 transitions. [2020-10-19 18:24:01,714 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6472 transitions. Word has length 28 [2020-10-19 18:24:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:01,714 INFO L481 AbstractCegarLoop]: Abstraction has 5130 states and 6472 transitions. [2020-10-19 18:24:01,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6472 transitions. [2020-10-19 18:24:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 18:24:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:01,722 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 18:24:01,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 18:24:01,722 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:01,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1031194369, now seen corresponding path program 1 times [2020-10-19 18:24:01,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:01,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181228743] [2020-10-19 18:24:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:01,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181228743] [2020-10-19 18:24:01,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:01,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:01,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841937776] [2020-10-19 18:24:01,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:01,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:01,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:01,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:01,764 INFO L87 Difference]: Start difference. First operand 5130 states and 6472 transitions. Second operand 4 states. [2020-10-19 18:24:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:01,889 INFO L93 Difference]: Finished difference Result 6539 states and 7945 transitions. [2020-10-19 18:24:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:01,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-19 18:24:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:01,902 INFO L225 Difference]: With dead ends: 6539 [2020-10-19 18:24:01,902 INFO L226 Difference]: Without dead ends: 6539 [2020-10-19 18:24:01,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2020-10-19 18:24:01,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6538. [2020-10-19 18:24:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6538 states. [2020-10-19 18:24:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7944 transitions. [2020-10-19 18:24:01,993 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7944 transitions. Word has length 28 [2020-10-19 18:24:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:01,993 INFO L481 AbstractCegarLoop]: Abstraction has 6538 states and 7944 transitions. [2020-10-19 18:24:01,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7944 transitions. [2020-10-19 18:24:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:24:02,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:02,001 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 18:24:02,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 18:24:02,002 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:02,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1374904174, now seen corresponding path program 1 times [2020-10-19 18:24:02,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:02,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906840994] [2020-10-19 18:24:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:02,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:02,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906840994] [2020-10-19 18:24:02,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:02,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:02,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618005339] [2020-10-19 18:24:02,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:02,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:02,057 INFO L87 Difference]: Start difference. First operand 6538 states and 7944 transitions. Second operand 4 states. [2020-10-19 18:24:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:02,170 INFO L93 Difference]: Finished difference Result 6667 states and 7945 transitions. [2020-10-19 18:24:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:02,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:24:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:02,182 INFO L225 Difference]: With dead ends: 6667 [2020-10-19 18:24:02,182 INFO L226 Difference]: Without dead ends: 6667 [2020-10-19 18:24:02,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2020-10-19 18:24:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6666. [2020-10-19 18:24:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6666 states. [2020-10-19 18:24:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 7944 transitions. [2020-10-19 18:24:02,280 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 7944 transitions. Word has length 29 [2020-10-19 18:24:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:02,280 INFO L481 AbstractCegarLoop]: Abstraction has 6666 states and 7944 transitions. [2020-10-19 18:24:02,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 7944 transitions. [2020-10-19 18:24:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:24:02,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:02,293 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 18:24:02,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-19 18:24:02,294 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:02,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1908945872, now seen corresponding path program 1 times [2020-10-19 18:24:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:02,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027833664] [2020-10-19 18:24:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:02,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027833664] [2020-10-19 18:24:02,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795183503] [2020-10-19 18:24:02,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:02,348 INFO L87 Difference]: Start difference. First operand 6666 states and 7944 transitions. Second operand 4 states. [2020-10-19 18:24:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:02,498 INFO L93 Difference]: Finished difference Result 10762 states and 12424 transitions. [2020-10-19 18:24:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:02,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:24:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:02,527 INFO L225 Difference]: With dead ends: 10762 [2020-10-19 18:24:02,527 INFO L226 Difference]: Without dead ends: 10762 [2020-10-19 18:24:02,528 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 18:24:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2020-10-19 18:24:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 10250. [2020-10-19 18:24:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-10-19 18:24:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 11912 transitions. [2020-10-19 18:24:02,732 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 11912 transitions. Word has length 29 [2020-10-19 18:24:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:02,733 INFO L481 AbstractCegarLoop]: Abstraction has 10250 states and 11912 transitions. [2020-10-19 18:24:02,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 11912 transitions. [2020-10-19 18:24:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 18:24:02,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:02,750 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 18:24:02,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-19 18:24:02,750 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:24:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:02,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1322139858, now seen corresponding path program 1 times [2020-10-19 18:24:02,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:02,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740024783] [2020-10-19 18:24:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:02,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740024783] [2020-10-19 18:24:02,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:02,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:02,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490861478] [2020-10-19 18:24:02,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:02,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:02,795 INFO L87 Difference]: Start difference. First operand 10250 states and 11912 transitions. Second operand 4 states. [2020-10-19 18:24:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:02,912 INFO L93 Difference]: Finished difference Result 12807 states and 14086 transitions. [2020-10-19 18:24:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:02,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-19 18:24:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:02,913 INFO L225 Difference]: With dead ends: 12807 [2020-10-19 18:24:02,913 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:24:02,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:24:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:24:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:24:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:24:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:24:02,914 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-19 18:24:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:02,915 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:24:02,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:24:02,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:24:02,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-19 18:24:02,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:24:02 BoogieIcfgContainer [2020-10-19 18:24:02,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:24:02,923 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:24:02,923 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:24:02,924 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:24:02,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:23:56" (3/4) ... [2020-10-19 18:24:02,943 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:24:02,955 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 18:24:02,955 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:24:02,955 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:24:02,962 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:24:02,962 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 18:24:02,962 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:24:02,963 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 18:24:03,022 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:24:03,022 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:24:03,024 INFO L168 Benchmark]: Toolchain (without parser) took 7837.64 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 317.2 MB). Free memory was 958.6 MB in the beginning and 1.2 GB in the end (delta: -250.0 MB). Peak memory consumption was 67.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:03,025 INFO L168 Benchmark]: CDTParser took 0.30 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 18:24:03,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -169.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:03,026 INFO L168 Benchmark]: Boogie Preprocessor took 47.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:03,026 INFO L168 Benchmark]: RCFGBuilder took 472.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:03,026 INFO L168 Benchmark]: TraceAbstraction took 6840.65 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 184.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -115.3 MB). Peak memory consumption was 69.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:03,027 INFO L168 Benchmark]: Witness Printer took 98.92 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:03,029 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 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 366.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -169.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 472.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6840.65 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 184.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -115.3 MB). Peak memory consumption was 69.2 MB. Max. memory is 11.5 GB. * Witness Printer took 98.92 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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, 47 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.7s, OverallIterations: 26, TraceHistogramMax: 1, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2026 SDtfs, 2884 SDslu, 193 SDs, 0 SdLazy, 1413 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10250occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 2049 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 640 NumberOfCodeBlocks, 640 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 46238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 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...