/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:56:47,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:56:47,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:56:47,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:56:47,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:56:47,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:56:47,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:56:47,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:56:47,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:56:47,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:56:47,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:56:47,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:56:47,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:56:47,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:56:47,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:56:47,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:56:47,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:56:47,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:56:47,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:56:47,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:56:47,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:56:47,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:56:47,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:56:47,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:56:47,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 18:56:47,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 18:56:47,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 18:56:47,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 18:56:48,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 18:56:48,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 18:56:48,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:56:48,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:56:48,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:56:48,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:56:48,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:56:48,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:56:48,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:56:48,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:56:48,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:56:48,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:56:48,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:56:48,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:56:48,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:56:48,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:56:48,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:56:48,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:56:48,036 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:56:48,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:56:48,037 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:56:48,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:56:48,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:56:48,037 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:56:48,038 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:56:48,038 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:56:48,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:56:48,040 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:56:48,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:56:48,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:56:48,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:56:48,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:56:48,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:48,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:56:48,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:56:48,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:56:48,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:56:48,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:56:48,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:56:48,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:56:48,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:56:48,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:56:48,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:56:48,488 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:56:48,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2020-12-22 18:56:48,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56bd6043/35fe71ecba93493fa3b6a7f9aa2f24fa/FLAG728308cfb [2020-12-22 18:56:49,222 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:56:49,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2020-12-22 18:56:49,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56bd6043/35fe71ecba93493fa3b6a7f9aa2f24fa/FLAG728308cfb [2020-12-22 18:56:49,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56bd6043/35fe71ecba93493fa3b6a7f9aa2f24fa [2020-12-22 18:56:49,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:56:49,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:56:49,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:49,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:56:49,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:56:49,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:49" (1/1) ... [2020-12-22 18:56:49,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe248e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:49, skipping insertion in model container [2020-12-22 18:56:49,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:49" (1/1) ... [2020-12-22 18:56:49,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:56:49,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:56:50,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:50,018 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:56:50,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:50,174 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:56:50,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50 WrapperNode [2020-12-22 18:56:50,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:50,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:50,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:56:50,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:56:50,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:50,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:56:50,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:56:50,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:56:50,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... [2020-12-22 18:56:50,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:56:50,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:56:50,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:56:50,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:56:50,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 18:56:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:56:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 18:56:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 18:56:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:56:50,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:56:50,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:56:50,897 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 18:56:50,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:50 BoogieIcfgContainer [2020-12-22 18:56:50,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:56:50,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:56:50,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:56:50,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:56:50,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:56:49" (1/3) ... [2020-12-22 18:56:50,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6c5e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:50, skipping insertion in model container [2020-12-22 18:56:50,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:50" (2/3) ... [2020-12-22 18:56:50,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6c5e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:50, skipping insertion in model container [2020-12-22 18:56:50,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:50" (3/3) ... [2020-12-22 18:56:50,907 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2020-12-22 18:56:50,914 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:56:50,919 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 18:56:50,939 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 18:56:50,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:56:50,962 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:56:50,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:56:50,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:56:50,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:56:50,963 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:56:50,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:56:50,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:56:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-22 18:56:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:50,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:50,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:50,986 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:50,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 18:56:51,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:51,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600007658] [2020-12-22 18:56:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:51,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600007658] [2020-12-22 18:56:51,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:51,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:51,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364975353] [2020-12-22 18:56:51,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:51,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:51,207 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-12-22 18:56:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:51,261 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-12-22 18:56:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:51,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 18:56:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:51,272 INFO L225 Difference]: With dead ends: 25 [2020-12-22 18:56:51,273 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 18:56:51,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 18:56:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 18:56:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 18:56:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-22 18:56:51,321 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2020-12-22 18:56:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:51,322 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-22 18:56:51,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-22 18:56:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:51,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:51,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:51,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:56:51,324 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-22 18:56:51,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:51,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552713903] [2020-12-22 18:56:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:51,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552713903] [2020-12-22 18:56:51,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:51,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088106088] [2020-12-22 18:56:51,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:51,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:51,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:51,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:51,488 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-22 18:56:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:51,561 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-22 18:56:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:51,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 18:56:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:51,565 INFO L225 Difference]: With dead ends: 27 [2020-12-22 18:56:51,565 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 18:56:51,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 18:56:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-22 18:56:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 18:56:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-22 18:56:51,571 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2020-12-22 18:56:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:51,572 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-22 18:56:51,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-22 18:56:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 18:56:51,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:51,573 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:51,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:56:51,573 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:51,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2020-12-22 18:56:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:51,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873460242] [2020-12-22 18:56:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873460242] [2020-12-22 18:56:51,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332882574] [2020-12-22 18:56:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 18:56:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:51,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 18:56:51,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 18:56:51,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521958193] [2020-12-22 18:56:51,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:51,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:51,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:51,863 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-12-22 18:56:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:51,902 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-22 18:56:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:51,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 18:56:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:51,904 INFO L225 Difference]: With dead ends: 44 [2020-12-22 18:56:51,904 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 18:56:51,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 18:56:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-22 18:56:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 18:56:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-22 18:56:51,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2020-12-22 18:56:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:51,911 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-22 18:56:51,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-22 18:56:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 18:56:51,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:51,912 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:52,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 18:56:52,128 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:52,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2020-12-22 18:56:52,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:52,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699817400] [2020-12-22 18:56:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:52,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699817400] [2020-12-22 18:56:52,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166043258] [2020-12-22 18:56:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 18:56:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:52,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:56:52,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:52,459 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:52,461 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:52,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:52,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:52,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 18:56:52,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398185647] [2020-12-22 18:56:52,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:52,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:52,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:52,550 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-12-22 18:56:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:52,620 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-22 18:56:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:52,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 18:56:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:52,622 INFO L225 Difference]: With dead ends: 32 [2020-12-22 18:56:52,622 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 18:56:52,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 18:56:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-22 18:56:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 18:56:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-22 18:56:52,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2020-12-22 18:56:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:52,629 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-22 18:56:52,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-22 18:56:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 18:56:52,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:52,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:52,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:52,844 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2020-12-22 18:56:52,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:52,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621132882] [2020-12-22 18:56:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:52,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621132882] [2020-12-22 18:56:52,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:52,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:56:52,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371061112] [2020-12-22 18:56:52,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:52,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:52,913 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-12-22 18:56:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:52,993 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-22 18:56:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:56:52,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-22 18:56:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:52,994 INFO L225 Difference]: With dead ends: 30 [2020-12-22 18:56:52,995 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 18:56:52,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:56:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 18:56:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-22 18:56:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 18:56:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-22 18:56:52,999 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-12-22 18:56:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:53,000 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-22 18:56:53,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-22 18:56:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 18:56:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:53,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:53,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 18:56:53,001 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:53,002 INFO L82 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2020-12-22 18:56:53,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:53,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076187475] [2020-12-22 18:56:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:53,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076187475] [2020-12-22 18:56:53,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077391084] [2020-12-22 18:56:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 18:56:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:53,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:53,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2020-12-22 18:56:53,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324416109] [2020-12-22 18:56:53,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 18:56:53,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 18:56:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:56:53,378 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 13 states. [2020-12-22 18:56:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:53,654 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-22 18:56:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:56:53,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-22 18:56:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:53,656 INFO L225 Difference]: With dead ends: 34 [2020-12-22 18:56:53,656 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 18:56:53,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-12-22 18:56:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 18:56:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-12-22 18:56:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 18:56:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-22 18:56:53,661 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2020-12-22 18:56:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:53,661 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-22 18:56:53,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 18:56:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-22 18:56:53,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 18:56:53,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:53,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:53,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:53,876 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:53,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1300245881, now seen corresponding path program 1 times [2020-12-22 18:56:53,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:53,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822271332] [2020-12-22 18:56:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822271332] [2020-12-22 18:56:54,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990173691] [2020-12-22 18:56:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 18:56:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:54,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 18:56:54,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2020-12-22 18:56:54,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268970789] [2020-12-22 18:56:54,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:54,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:54,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:54,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:56:54,157 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-12-22 18:56:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:54,179 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-12-22 18:56:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:54,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 18:56:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:54,180 INFO L225 Difference]: With dead ends: 29 [2020-12-22 18:56:54,180 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 18:56:54,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:56:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 18:56:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 18:56:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 18:56:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-22 18:56:54,184 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-12-22 18:56:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:54,185 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-22 18:56:54,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-22 18:56:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:56:54,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:54,186 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:54,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:54,401 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2020-12-22 18:56:54,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:54,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305841049] [2020-12-22 18:56:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:54,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305841049] [2020-12-22 18:56:54,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:54,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:56:54,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935211875] [2020-12-22 18:56:54,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:54,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:54,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:54,509 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-12-22 18:56:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:54,571 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-22 18:56:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:54,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-22 18:56:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:54,575 INFO L225 Difference]: With dead ends: 33 [2020-12-22 18:56:54,575 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 18:56:54,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 18:56:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 18:56:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 18:56:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 18:56:54,582 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2020-12-22 18:56:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:54,582 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 18:56:54,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 18:56:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:56:54,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:54,583 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:54,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 18:56:54,583 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2020-12-22 18:56:54,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:54,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034767836] [2020-12-22 18:56:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034767836] [2020-12-22 18:56:54,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710731230] [2020-12-22 18:56:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 18:56:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:54,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:54,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-22 18:56:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382421518] [2020-12-22 18:56:54,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 18:56:54,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 18:56:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 18:56:54,912 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-12-22 18:56:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:55,007 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 18:56:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 18:56:55,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-22 18:56:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:55,009 INFO L225 Difference]: With dead ends: 34 [2020-12-22 18:56:55,009 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 18:56:55,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:56:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 18:56:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 18:56:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 18:56:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 18:56:55,024 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-12-22 18:56:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:55,025 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 18:56:55,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 18:56:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 18:56:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 18:56:55,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:55,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:55,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:55,243 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:55,244 INFO L82 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2020-12-22 18:56:55,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:55,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199437778] [2020-12-22 18:56:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:55,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199437778] [2020-12-22 18:56:55,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428104808] [2020-12-22 18:56:55,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:55,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:55,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 18:56:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:55,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:55,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-22 18:56:55,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391623793] [2020-12-22 18:56:55,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:56:55,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:55,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:56:55,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:56:55,656 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 16 states. [2020-12-22 18:56:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:55,933 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-22 18:56:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:56:55,934 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-12-22 18:56:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:55,935 INFO L225 Difference]: With dead ends: 30 [2020-12-22 18:56:55,935 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 18:56:55,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-12-22 18:56:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 18:56:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-22 18:56:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 18:56:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 18:56:55,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-12-22 18:56:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:55,938 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 18:56:55,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:56:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 18:56:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 18:56:55,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:55,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:56,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:56,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2020-12-22 18:56:56,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:56,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647628317] [2020-12-22 18:56:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647628317] [2020-12-22 18:56:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397435395] [2020-12-22 18:56:56,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:56,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 18:56:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 18:56:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:56,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:56,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-22 18:56:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784488993] [2020-12-22 18:56:56,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 18:56:56,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 18:56:56,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:56:56,539 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-12-22 18:56:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:56,691 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 18:56:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:56:56,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-22 18:56:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:56,692 INFO L225 Difference]: With dead ends: 48 [2020-12-22 18:56:56,692 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 18:56:56,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:56:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 18:56:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-22 18:56:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 18:56:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 18:56:56,698 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-12-22 18:56:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:56,698 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 18:56:56,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 18:56:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 18:56:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 18:56:56,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:56,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:56,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:56,902 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2020-12-22 18:56:56,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:56,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360679425] [2020-12-22 18:56:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360679425] [2020-12-22 18:56:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093553168] [2020-12-22 18:56:57,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:57,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:56:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:57,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 18:56:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:57,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:57,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-12-22 18:56:57,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875323339] [2020-12-22 18:56:57,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 18:56:57,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 18:56:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:56:57,399 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 19 states. [2020-12-22 18:56:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:57,860 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 18:56:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:57,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-22 18:56:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:57,865 INFO L225 Difference]: With dead ends: 39 [2020-12-22 18:56:57,865 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 18:56:57,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-12-22 18:56:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 18:56:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 18:56:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 18:56:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 18:56:57,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-22 18:56:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:57,869 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 18:56:57,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 18:56:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 18:56:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 18:56:57,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:57,870 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:58,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 18:56:58,085 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:58,087 INFO L82 PathProgramCache]: Analyzing trace with hash -510819796, now seen corresponding path program 5 times [2020-12-22 18:56:58,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:58,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010744031] [2020-12-22 18:56:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:58,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010744031] [2020-12-22 18:56:58,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189835655] [2020-12-22 18:56:58,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:58,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 18:56:58,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 18:56:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:58,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:58,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-22 18:56:58,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539795023] [2020-12-22 18:56:58,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 18:56:58,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 18:56:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 18:56:58,600 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-12-22 18:56:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:58,808 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-22 18:56:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:58,808 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-22 18:56:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:58,809 INFO L225 Difference]: With dead ends: 62 [2020-12-22 18:56:58,809 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 18:56:58,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:56:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 18:56:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-22 18:56:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 18:56:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 18:56:58,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-12-22 18:56:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:58,813 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 18:56:58,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 18:56:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 18:56:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 18:56:58,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:58,815 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:59,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:59,030 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:59,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1615395281, now seen corresponding path program 6 times [2020-12-22 18:56:59,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:59,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354068591] [2020-12-22 18:56:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354068591] [2020-12-22 18:56:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469468762] [2020-12-22 18:56:59,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:59,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 18:56:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 18:56:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:59,485 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:56:59,485 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:59,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:59,492 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:59,492 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:56:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:59,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:59,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2020-12-22 18:56:59,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949950164] [2020-12-22 18:56:59,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 18:56:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 18:56:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:56:59,703 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-12-22 18:57:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:00,159 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 18:57:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:57:00,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-12-22 18:57:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:00,161 INFO L225 Difference]: With dead ends: 48 [2020-12-22 18:57:00,161 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 18:57:00,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:57:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 18:57:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 18:57:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 18:57:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-22 18:57:00,165 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-12-22 18:57:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:00,166 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-22 18:57:00,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 18:57:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-22 18:57:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 18:57:00,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:00,167 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:00,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:00,375 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash 658687019, now seen corresponding path program 7 times [2020-12-22 18:57:00,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:00,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74751546] [2020-12-22 18:57:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:00,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74751546] [2020-12-22 18:57:00,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402371967] [2020-12-22 18:57:00,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:00,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 18:57:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:00,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:00,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-22 18:57:00,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377748556] [2020-12-22 18:57:00,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 18:57:00,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 18:57:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:57:00,869 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 16 states. [2020-12-22 18:57:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:01,180 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-22 18:57:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:57:01,180 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-12-22 18:57:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:01,181 INFO L225 Difference]: With dead ends: 76 [2020-12-22 18:57:01,181 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 18:57:01,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-12-22 18:57:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 18:57:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-22 18:57:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 18:57:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-22 18:57:01,185 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2020-12-22 18:57:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:01,185 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-22 18:57:01,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 18:57:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-22 18:57:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 18:57:01,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:01,186 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:01,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 18:57:01,394 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 40506248, now seen corresponding path program 8 times [2020-12-22 18:57:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:01,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200184933] [2020-12-22 18:57:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:01,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200184933] [2020-12-22 18:57:01,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333402027] [2020-12-22 18:57:01,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:01,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:01,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 18:57:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:02,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:02,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2020-12-22 18:57:02,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413704246] [2020-12-22 18:57:02,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 18:57:02,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 18:57:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-12-22 18:57:02,035 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-12-22 18:57:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:02,664 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 18:57:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 18:57:02,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-12-22 18:57:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:02,667 INFO L225 Difference]: With dead ends: 57 [2020-12-22 18:57:02,667 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 18:57:02,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:57:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 18:57:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 18:57:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 18:57:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 18:57:02,684 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2020-12-22 18:57:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:02,684 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 18:57:02,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 18:57:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 18:57:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 18:57:02,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:02,686 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:02,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 18:57:02,903 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1129260658, now seen corresponding path program 9 times [2020-12-22 18:57:02,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:02,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797385804] [2020-12-22 18:57:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:03,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797385804] [2020-12-22 18:57:03,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672523396] [2020-12-22 18:57:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:03,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 18:57:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 18:57:03,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:03,560 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:03,561 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:03,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:03,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:03,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:04,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2020-12-22 18:57:04,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:04,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:04,346 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:04,346 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2020-12-22 18:57:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:04,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:04,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2020-12-22 18:57:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638119801] [2020-12-22 18:57:04,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 18:57:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 18:57:04,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 18:57:04,427 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 35 states. [2020-12-22 18:57:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:06,236 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-22 18:57:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:57:06,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 55 [2020-12-22 18:57:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:06,238 INFO L225 Difference]: With dead ends: 90 [2020-12-22 18:57:06,238 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 18:57:06,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 18:57:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 18:57:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-12-22 18:57:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 18:57:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-22 18:57:06,243 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-12-22 18:57:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:06,243 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-22 18:57:06,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 18:57:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-22 18:57:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 18:57:06,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:06,245 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:06,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 18:57:06,461 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:06,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1822347189, now seen corresponding path program 10 times [2020-12-22 18:57:06,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:06,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823428892] [2020-12-22 18:57:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:06,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823428892] [2020-12-22 18:57:06,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128926315] [2020-12-22 18:57:06,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:06,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 18:57:06,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:07,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:07,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2020-12-22 18:57:07,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959884010] [2020-12-22 18:57:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 18:57:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 18:57:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:57:07,346 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2020-12-22 18:57:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:08,052 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-22 18:57:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 18:57:08,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2020-12-22 18:57:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:08,053 INFO L225 Difference]: With dead ends: 66 [2020-12-22 18:57:08,053 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 18:57:08,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 18:57:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 18:57:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-22 18:57:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 18:57:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-12-22 18:57:08,057 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-12-22 18:57:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:08,057 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-12-22 18:57:08,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 18:57:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-12-22 18:57:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 18:57:08,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:08,059 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:08,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:08,273 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash 897187429, now seen corresponding path program 11 times [2020-12-22 18:57:08,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:08,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584705135] [2020-12-22 18:57:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:08,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584705135] [2020-12-22 18:57:08,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060432180] [2020-12-22 18:57:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:08,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 18:57:08,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 18:57:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:09,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:09,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 18:57:09,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037808329] [2020-12-22 18:57:09,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 18:57:09,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:09,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 18:57:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:57:09,116 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 20 states. [2020-12-22 18:57:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:09,660 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-12-22 18:57:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 18:57:09,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-12-22 18:57:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:09,661 INFO L225 Difference]: With dead ends: 104 [2020-12-22 18:57:09,661 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 18:57:09,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:57:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 18:57:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-22 18:57:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 18:57:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-22 18:57:09,664 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-12-22 18:57:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:09,664 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-22 18:57:09,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 18:57:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-22 18:57:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 18:57:09,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:09,665 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:09,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:09,869 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:09,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:09,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2146504834, now seen corresponding path program 12 times [2020-12-22 18:57:09,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:09,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345225847] [2020-12-22 18:57:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 45 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:10,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345225847] [2020-12-22 18:57:10,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975996296] [2020-12-22 18:57:10,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:10,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 18:57:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 18:57:10,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:10,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:10,835 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:10,842 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:10,842 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:11,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:11,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2020-12-22 18:57:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680097897] [2020-12-22 18:57:11,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 18:57:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 18:57:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 18:57:11,619 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 38 states. [2020-12-22 18:57:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:13,319 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-22 18:57:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 18:57:13,320 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 68 [2020-12-22 18:57:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:13,320 INFO L225 Difference]: With dead ends: 75 [2020-12-22 18:57:13,321 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 18:57:13,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=573, Invalid=2289, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 18:57:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 18:57:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 18:57:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 18:57:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 18:57:13,324 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2020-12-22 18:57:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:13,324 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 18:57:13,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 18:57:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 18:57:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 18:57:13,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:13,325 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:13,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:13,528 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash -111069768, now seen corresponding path program 13 times [2020-12-22 18:57:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:13,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301432287] [2020-12-22 18:57:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:13,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301432287] [2020-12-22 18:57:13,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367248896] [2020-12-22 18:57:13,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:14,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 18:57:14,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:14,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:14,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-22 18:57:14,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203892434] [2020-12-22 18:57:14,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 18:57:14,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 18:57:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-12-22 18:57:14,233 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-12-22 18:57:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:14,865 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2020-12-22 18:57:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 18:57:14,865 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-12-22 18:57:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:14,866 INFO L225 Difference]: With dead ends: 118 [2020-12-22 18:57:14,866 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 18:57:14,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-12-22 18:57:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 18:57:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-22 18:57:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 18:57:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 18:57:14,870 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-12-22 18:57:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:14,870 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 18:57:14,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 18:57:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 18:57:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 18:57:14,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:14,871 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:15,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 18:57:15,083 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:15,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1527788603, now seen corresponding path program 14 times [2020-12-22 18:57:15,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:15,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293460775] [2020-12-22 18:57:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:15,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293460775] [2020-12-22 18:57:15,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212385367] [2020-12-22 18:57:15,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:15,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:15,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 18:57:15,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:16,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:16,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2020-12-22 18:57:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549355716] [2020-12-22 18:57:16,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 18:57:16,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 18:57:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:57:16,106 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 34 states. [2020-12-22 18:57:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:17,242 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-12-22 18:57:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:57:17,248 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-12-22 18:57:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:17,249 INFO L225 Difference]: With dead ends: 84 [2020-12-22 18:57:17,250 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 18:57:17,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:57:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 18:57:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-22 18:57:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 18:57:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-12-22 18:57:17,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-12-22 18:57:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:17,256 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-12-22 18:57:17,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 18:57:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-12-22 18:57:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 18:57:17,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:17,257 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:17,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 18:57:17,464 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash 787512735, now seen corresponding path program 15 times [2020-12-22 18:57:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:17,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611973430] [2020-12-22 18:57:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:18,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611973430] [2020-12-22 18:57:18,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616905550] [2020-12-22 18:57:18,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:18,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 18:57:18,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 18:57:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:18,660 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:18,661 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:18,666 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:18,670 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:18,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:19,027 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 18:57:19,028 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:19,032 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:19,033 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:19,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-22 18:57:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:19,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:19,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 32 [2020-12-22 18:57:19,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378483471] [2020-12-22 18:57:19,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 18:57:19,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 18:57:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-12-22 18:57:19,206 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 32 states. [2020-12-22 18:57:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:20,135 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-12-22 18:57:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:57:20,135 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 82 [2020-12-22 18:57:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:20,136 INFO L225 Difference]: With dead ends: 132 [2020-12-22 18:57:20,136 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 18:57:20,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 18:57:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 18:57:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-22 18:57:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 18:57:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-22 18:57:20,140 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-12-22 18:57:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:20,140 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-22 18:57:20,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 18:57:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-22 18:57:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 18:57:20,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:20,141 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:20,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 18:57:20,345 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1328274820, now seen corresponding path program 16 times [2020-12-22 18:57:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333073848] [2020-12-22 18:57:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 91 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333073848] [2020-12-22 18:57:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500552452] [2020-12-22 18:57:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:21,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:21,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-22 18:57:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:21,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:21,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2020-12-22 18:57:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111892955] [2020-12-22 18:57:21,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 18:57:21,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 18:57:21,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 18:57:21,557 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 37 states. [2020-12-22 18:57:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:22,832 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-22 18:57:22,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 18:57:22,832 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 86 [2020-12-22 18:57:22,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:22,834 INFO L225 Difference]: With dead ends: 93 [2020-12-22 18:57:22,834 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 18:57:22,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=519, Invalid=1931, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 18:57:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 18:57:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-22 18:57:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 18:57:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-22 18:57:22,839 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2020-12-22 18:57:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:22,839 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-22 18:57:22,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 18:57:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-22 18:57:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 18:57:22,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:22,840 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:23,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 18:57:23,048 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1956884482, now seen corresponding path program 17 times [2020-12-22 18:57:23,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:23,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663612664] [2020-12-22 18:57:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:23,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663612664] [2020-12-22 18:57:23,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22886530] [2020-12-22 18:57:23,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:24,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 18:57:24,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 18:57:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:24,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:24,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-22 18:57:24,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036171047] [2020-12-22 18:57:24,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 18:57:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 18:57:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-12-22 18:57:24,447 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 26 states. [2020-12-22 18:57:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:25,415 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2020-12-22 18:57:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 18:57:25,415 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-22 18:57:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:25,416 INFO L225 Difference]: With dead ends: 146 [2020-12-22 18:57:25,416 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 18:57:25,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 18:57:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 18:57:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-12-22 18:57:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 18:57:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-22 18:57:25,420 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2020-12-22 18:57:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:25,420 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-22 18:57:25,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 18:57:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-22 18:57:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 18:57:25,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:25,421 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:25,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 18:57:25,626 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1756877761, now seen corresponding path program 18 times [2020-12-22 18:57:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:25,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688303212] [2020-12-22 18:57:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:26,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688303212] [2020-12-22 18:57:26,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142645057] [2020-12-22 18:57:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:26,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 18:57:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:26,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 18:57:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:26,943 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:26,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:26,951 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:26,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:26,952 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:28,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:28,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2020-12-22 18:57:28,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011595973] [2020-12-22 18:57:28,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 18:57:28,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 18:57:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2169, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 18:57:28,146 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 50 states. [2020-12-22 18:57:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:30,793 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-12-22 18:57:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 18:57:30,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 95 [2020-12-22 18:57:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:30,795 INFO L225 Difference]: With dead ends: 102 [2020-12-22 18:57:30,795 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 18:57:30,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1017, Invalid=4095, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 18:57:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 18:57:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-22 18:57:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 18:57:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-12-22 18:57:30,799 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2020-12-22 18:57:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:30,799 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-12-22 18:57:30,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 18:57:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-12-22 18:57:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 18:57:30,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:30,801 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:31,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:31,016 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash -924999207, now seen corresponding path program 19 times [2020-12-22 18:57:31,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:31,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029798075] [2020-12-22 18:57:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:31,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029798075] [2020-12-22 18:57:31,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34266083] [2020-12-22 18:57:31,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 18:57:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-22 18:57:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108952198] [2020-12-22 18:57:32,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 18:57:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 18:57:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:57:32,130 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 28 states. [2020-12-22 18:57:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:33,323 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2020-12-22 18:57:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 18:57:33,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 100 [2020-12-22 18:57:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:33,325 INFO L225 Difference]: With dead ends: 160 [2020-12-22 18:57:33,325 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 18:57:33,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 18:57:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 18:57:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-12-22 18:57:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 18:57:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-12-22 18:57:33,329 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2020-12-22 18:57:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:33,329 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-12-22 18:57:33,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 18:57:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-12-22 18:57:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 18:57:33,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:33,331 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:33,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 18:57:33,534 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1790355830, now seen corresponding path program 20 times [2020-12-22 18:57:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:33,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018525062] [2020-12-22 18:57:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 153 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018525062] [2020-12-22 18:57:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450489742] [2020-12-22 18:57:34,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:34,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:34,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:34,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-22 18:57:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:34,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:34,489 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:34,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:34,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:34,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:57:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:35,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:35,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2020-12-22 18:57:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872231624] [2020-12-22 18:57:35,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 18:57:35,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:35,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 18:57:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2576, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 18:57:35,891 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 54 states. [2020-12-22 18:57:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:37,715 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-22 18:57:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 18:57:37,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 104 [2020-12-22 18:57:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:37,718 INFO L225 Difference]: With dead ends: 111 [2020-12-22 18:57:37,718 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 18:57:37,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=745, Invalid=3947, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 18:57:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 18:57:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-12-22 18:57:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 18:57:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-22 18:57:37,723 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2020-12-22 18:57:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:37,723 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-22 18:57:37,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 18:57:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-22 18:57:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 18:57:37,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:37,724 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:37,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:37,938 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash 45684036, now seen corresponding path program 21 times [2020-12-22 18:57:37,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:37,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468949457] [2020-12-22 18:57:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:38,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468949457] [2020-12-22 18:57:38,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197751800] [2020-12-22 18:57:38,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:39,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 18:57:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:39,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 18:57:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:39,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:39,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-22 18:57:39,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58163665] [2020-12-22 18:57:39,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 18:57:39,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 18:57:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-12-22 18:57:39,703 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 30 states. [2020-12-22 18:57:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:41,009 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-12-22 18:57:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 18:57:41,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 109 [2020-12-22 18:57:41,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:41,011 INFO L225 Difference]: With dead ends: 174 [2020-12-22 18:57:41,011 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 18:57:41,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=1667, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 18:57:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 18:57:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-22 18:57:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 18:57:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-22 18:57:41,015 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2020-12-22 18:57:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:41,015 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-22 18:57:41,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 18:57:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-22 18:57:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 18:57:41,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:41,016 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:41,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 18:57:41,220 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash 941772359, now seen corresponding path program 22 times [2020-12-22 18:57:41,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:41,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383112260] [2020-12-22 18:57:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:41,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383112260] [2020-12-22 18:57:41,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591468648] [2020-12-22 18:57:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:42,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:42,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-22 18:57:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:42,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:42,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2020-12-22 18:57:42,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395377803] [2020-12-22 18:57:42,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 18:57:42,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 18:57:42,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:57:42,946 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 46 states. [2020-12-22 18:57:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:44,811 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-22 18:57:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 18:57:44,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 113 [2020-12-22 18:57:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:44,813 INFO L225 Difference]: With dead ends: 120 [2020-12-22 18:57:44,813 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 18:57:44,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=801, Invalid=2981, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:57:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 18:57:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-22 18:57:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 18:57:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-12-22 18:57:44,818 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2020-12-22 18:57:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:44,818 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-12-22 18:57:44,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 18:57:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-12-22 18:57:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 18:57:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:44,819 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:45,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:45,033 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 530107155, now seen corresponding path program 23 times [2020-12-22 18:57:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:45,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302327988] [2020-12-22 18:57:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302327988] [2020-12-22 18:57:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948314316] [2020-12-22 18:57:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:47,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 18:57:47,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 18:57:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:47,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:47,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2020-12-22 18:57:47,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595387413] [2020-12-22 18:57:47,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 18:57:47,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:47,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 18:57:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2020-12-22 18:57:47,454 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 32 states. [2020-12-22 18:57:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:49,112 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-12-22 18:57:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 18:57:49,112 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-22 18:57:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:49,113 INFO L225 Difference]: With dead ends: 188 [2020-12-22 18:57:49,113 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 18:57:49,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:57:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 18:57:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-12-22 18:57:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 18:57:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-12-22 18:57:49,118 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2020-12-22 18:57:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:49,118 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-12-22 18:57:49,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 18:57:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-12-22 18:57:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 18:57:49,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:49,119 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:49,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 18:57:49,324 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash 660342128, now seen corresponding path program 24 times [2020-12-22 18:57:49,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:49,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934440246] [2020-12-22 18:57:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 231 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:50,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934440246] [2020-12-22 18:57:50,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556511760] [2020-12-22 18:57:50,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:51,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 18:57:51,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-22 18:57:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:51,267 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:57:51,268 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:51,273 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:51,274 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:51,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:10, output treesize:3 [2020-12-22 18:57:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:52,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:52,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2020-12-22 18:57:52,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130238206] [2020-12-22 18:57:52,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 18:57:52,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 18:57:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3254, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:57:52,779 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 62 states. [2020-12-22 18:57:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:56,184 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-12-22 18:57:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 18:57:56,185 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-22 18:57:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:56,186 INFO L225 Difference]: With dead ends: 129 [2020-12-22 18:57:56,186 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 18:57:56,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1678, Invalid=6332, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 18:57:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 18:57:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-22 18:57:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 18:57:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-12-22 18:57:56,191 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2020-12-22 18:57:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:56,191 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-12-22 18:57:56,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 18:57:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-12-22 18:57:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 18:57:56,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:56,192 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:56,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:56,398 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:57:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1490036106, now seen corresponding path program 25 times [2020-12-22 18:57:56,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:56,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819105071] [2020-12-22 18:57:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:57,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819105071] [2020-12-22 18:57:57,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391901741] [2020-12-22 18:57:57,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 18:57:57,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:57:57,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:57,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2020-12-22 18:57:57,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695069463] [2020-12-22 18:57:57,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 18:57:57,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 18:57:57,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:57:57,956 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 34 states. [2020-12-22 18:57:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:59,902 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-12-22 18:57:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 18:57:59,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 127 [2020-12-22 18:57:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:59,903 INFO L225 Difference]: With dead ends: 202 [2020-12-22 18:57:59,903 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 18:57:59,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=2193, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 18:57:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 18:57:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-12-22 18:57:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 18:57:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-12-22 18:57:59,907 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2020-12-22 18:57:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:59,907 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-12-22 18:57:59,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 18:57:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-12-22 18:57:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 18:57:59,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:59,908 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:00,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 18:58:00,109 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1094958131, now seen corresponding path program 26 times [2020-12-22 18:58:00,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:00,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552873721] [2020-12-22 18:58:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 276 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552873721] [2020-12-22 18:58:01,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418558851] [2020-12-22 18:58:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:01,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:58:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-22 18:58:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:02,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:02,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 51 [2020-12-22 18:58:02,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988242244] [2020-12-22 18:58:02,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 18:58:02,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 18:58:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2273, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 18:58:02,246 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 52 states. [2020-12-22 18:58:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:04,413 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-12-22 18:58:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 18:58:04,414 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 131 [2020-12-22 18:58:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:04,415 INFO L225 Difference]: With dead ends: 138 [2020-12-22 18:58:04,415 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 18:58:04,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1024, Invalid=3806, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 18:58:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 18:58:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-22 18:58:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 18:58:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-12-22 18:58:04,419 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2020-12-22 18:58:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:04,419 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-12-22 18:58:04,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 18:58:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-12-22 18:58:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 18:58:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:04,420 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:04,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:04,623 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -929474227, now seen corresponding path program 27 times [2020-12-22 18:58:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:04,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910422705] [2020-12-22 18:58:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:05,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910422705] [2020-12-22 18:58:05,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448717976] [2020-12-22 18:58:05,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:06,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 18:58:06,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 18:58:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:06,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:58:06,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:06,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:06,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:06,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:58:07,744 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 18:58:07,745 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:07,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:07,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:07,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-22 18:58:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:08,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:08,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 50 [2020-12-22 18:58:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619370458] [2020-12-22 18:58:08,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 18:58:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 18:58:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2334, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 18:58:08,028 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 50 states. [2020-12-22 18:58:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:10,442 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2020-12-22 18:58:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 18:58:10,442 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 136 [2020-12-22 18:58:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:10,444 INFO L225 Difference]: With dead ends: 216 [2020-12-22 18:58:10,444 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 18:58:10,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=218, Invalid=4204, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 18:58:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 18:58:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-12-22 18:58:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 18:58:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-12-22 18:58:10,449 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2020-12-22 18:58:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:10,449 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-12-22 18:58:10,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 18:58:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-12-22 18:58:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 18:58:10,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:10,450 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:10,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 18:58:10,651 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:10,652 INFO L82 PathProgramCache]: Analyzing trace with hash -693660054, now seen corresponding path program 28 times [2020-12-22 18:58:10,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:10,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497569019] [2020-12-22 18:58:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:11,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497569019] [2020-12-22 18:58:11,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140360566] [2020-12-22 18:58:11,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:12,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:58:12,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 147 conjunts are in the unsatisfiable core [2020-12-22 18:58:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:12,068 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:58:12,069 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:12,075 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:12,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:12,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:58:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 378 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:14,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:14,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2020-12-22 18:58:14,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327988355] [2020-12-22 18:58:14,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 18:58:14,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:14,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 18:58:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4358, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 18:58:14,400 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 70 states. [2020-12-22 18:58:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:17,332 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2020-12-22 18:58:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 18:58:17,334 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 140 [2020-12-22 18:58:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:17,335 INFO L225 Difference]: With dead ends: 147 [2020-12-22 18:58:17,335 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 18:58:17,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1207, Invalid=6625, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 18:58:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 18:58:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-12-22 18:58:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-22 18:58:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-12-22 18:58:17,339 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2020-12-22 18:58:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:17,339 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-12-22 18:58:17,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 18:58:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-12-22 18:58:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 18:58:17,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:17,340 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:17,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 18:58:17,544 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash -455466800, now seen corresponding path program 29 times [2020-12-22 18:58:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:17,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385471112] [2020-12-22 18:58:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:18,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385471112] [2020-12-22 18:58:18,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188322544] [2020-12-22 18:58:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:20,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 18:58:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:20,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 195 conjunts are in the unsatisfiable core [2020-12-22 18:58:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:20,815 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:58:20,815 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:20,822 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:20,823 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:20,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:58:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:26,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:26,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 51] total 86 [2020-12-22 18:58:26,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792191575] [2020-12-22 18:58:26,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 18:58:26,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:26,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 18:58:26,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=7035, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 18:58:26,478 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 86 states. [2020-12-22 18:58:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:42,563 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2020-12-22 18:58:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 18:58:42,564 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 145 [2020-12-22 18:58:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:42,567 INFO L225 Difference]: With dead ends: 236 [2020-12-22 18:58:42,567 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 18:58:42,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2046, Invalid=27024, Unknown=0, NotChecked=0, Total=29070 [2020-12-22 18:58:42,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 18:58:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2020-12-22 18:58:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 18:58:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-12-22 18:58:42,573 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2020-12-22 18:58:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:42,574 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-12-22 18:58:42,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 18:58:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-12-22 18:58:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 18:58:42,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:42,575 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:42,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 18:58:42,781 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash -461984633, now seen corresponding path program 30 times [2020-12-22 18:58:42,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:42,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730576026] [2020-12-22 18:58:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:44,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730576026] [2020-12-22 18:58:44,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553236178] [2020-12-22 18:58:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:46,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 18:58:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 18:58:47,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:47,011 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:58:47,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:47,019 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:47,019 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:47,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:58:48,396 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 18:58:48,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:48,403 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:48,404 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:48,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-22 18:58:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:48,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:48,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 56 [2020-12-22 18:58:48,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305728600] [2020-12-22 18:58:48,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 18:58:48,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 18:58:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2950, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 18:58:48,749 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 56 states. [2020-12-22 18:58:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:51,754 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2020-12-22 18:58:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 18:58:51,756 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 154 [2020-12-22 18:58:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:51,757 INFO L225 Difference]: With dead ends: 244 [2020-12-22 18:58:51,757 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 18:58:51,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=244, Invalid=5306, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 18:58:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 18:58:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-12-22 18:58:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 18:58:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-12-22 18:58:51,763 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2020-12-22 18:58:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:51,763 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-12-22 18:58:51,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 18:58:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-12-22 18:58:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 18:58:51,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:51,764 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:51,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 18:58:51,971 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:51,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1331905436, now seen corresponding path program 31 times [2020-12-22 18:58:51,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:51,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662478738] [2020-12-22 18:58:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 435 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662478738] [2020-12-22 18:58:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358372670] [2020-12-22 18:58:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 162 conjunts are in the unsatisfiable core [2020-12-22 18:58:53,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:58:55,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:55,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 60 [2020-12-22 18:58:55,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096951928] [2020-12-22 18:58:55,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 18:58:55,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 18:58:55,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=3128, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 18:58:55,080 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 61 states. [2020-12-22 18:58:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:58,584 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-12-22 18:58:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 18:58:58,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 158 [2020-12-22 18:58:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:58,586 INFO L225 Difference]: With dead ends: 165 [2020-12-22 18:58:58,586 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 18:58:58,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1411, Invalid=5231, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 18:58:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 18:58:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-22 18:58:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 18:58:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2020-12-22 18:58:58,592 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2020-12-22 18:58:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:58,592 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2020-12-22 18:58:58,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 18:58:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2020-12-22 18:58:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 18:58:58,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:58,594 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:58,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 18:58:58,808 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:58:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash -907041002, now seen corresponding path program 32 times [2020-12-22 18:58:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:58,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919724262] [2020-12-22 18:58:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:00,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919724262] [2020-12-22 18:59:00,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970508317] [2020-12-22 18:59:00,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:01,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:59:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 18:59:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:01,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:01,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2020-12-22 18:59:01,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784641695] [2020-12-22 18:59:01,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 18:59:01,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:01,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 18:59:01,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 18:59:01,522 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 42 states. [2020-12-22 18:59:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:04,820 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2020-12-22 18:59:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 18:59:04,821 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2020-12-22 18:59:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:04,822 INFO L225 Difference]: With dead ends: 258 [2020-12-22 18:59:04,822 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 18:59:04,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=199, Invalid=3461, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 18:59:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 18:59:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-12-22 18:59:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-22 18:59:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-12-22 18:59:04,826 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2020-12-22 18:59:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:04,827 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-12-22 18:59:04,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 18:59:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-12-22 18:59:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 18:59:04,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:04,828 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:05,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 18:59:05,043 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:59:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2039554009, now seen corresponding path program 33 times [2020-12-22 18:59:05,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:05,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222951197] [2020-12-22 18:59:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 496 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222951197] [2020-12-22 18:59:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354117860] [2020-12-22 18:59:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:10,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 18:59:10,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 201 conjunts are in the unsatisfiable core [2020-12-22 18:59:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:10,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:59:10,852 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:10,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:10,859 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:10,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 18:59:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-12-22 18:59:15,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:15,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2020-12-22 18:59:15,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959766508] [2020-12-22 18:59:15,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 18:59:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 18:59:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=6323, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 18:59:15,587 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 82 states. [2020-12-22 18:59:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:27,658 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-12-22 18:59:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 18:59:27,659 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 167 [2020-12-22 18:59:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:27,661 INFO L225 Difference]: With dead ends: 174 [2020-12-22 18:59:27,661 INFO L226 Difference]: Without dead ends: 174 [2020-12-22 18:59:27,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1412, Invalid=13840, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 18:59:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-22 18:59:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-12-22 18:59:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 18:59:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2020-12-22 18:59:27,679 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 167 [2020-12-22 18:59:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:27,680 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2020-12-22 18:59:27,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 18:59:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2020-12-22 18:59:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 18:59:27,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:27,681 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:27,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 18:59:27,882 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:59:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash 820520129, now seen corresponding path program 34 times [2020-12-22 18:59:27,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:27,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560798604] [2020-12-22 18:59:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:29,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560798604] [2020-12-22 18:59:29,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906956308] [2020-12-22 18:59:29,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:30,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:59:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:30,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 18:59:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:30,678 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:59:30,682 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:30,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:30,692 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:30,692 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:59:32,556 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 18:59:32,558 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:32,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:32,565 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:32,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-12-22 18:59:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 36 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:32,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:32,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 62 [2020-12-22 18:59:32,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76332020] [2020-12-22 18:59:32,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 18:59:32,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:32,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 18:59:32,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3638, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:59:32,999 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 62 states. [2020-12-22 18:59:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:37,412 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-12-22 18:59:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 18:59:37,413 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 172 [2020-12-22 18:59:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:37,414 INFO L225 Difference]: With dead ends: 272 [2020-12-22 18:59:37,414 INFO L226 Difference]: Without dead ends: 180 [2020-12-22 18:59:37,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=270, Invalid=6536, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 18:59:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-22 18:59:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-12-22 18:59:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 18:59:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-12-22 18:59:37,420 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 172 [2020-12-22 18:59:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:37,420 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-12-22 18:59:37,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 18:59:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-12-22 18:59:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 18:59:37,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:37,421 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:37,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:37,635 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:59:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 123656030, now seen corresponding path program 35 times [2020-12-22 18:59:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:37,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677049820] [2020-12-22 18:59:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 561 proven. 943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677049820] [2020-12-22 18:59:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470174564] [2020-12-22 18:59:39,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:44,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-22 18:59:44,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 188 conjunts are in the unsatisfiable core [2020-12-22 18:59:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:44,244 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 18:59:44,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:44,253 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:44,254 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:44,254 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 18:59:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 630 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:46,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:46,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2020-12-22 18:59:46,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471227099] [2020-12-22 18:59:46,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 18:59:46,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 18:59:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=3840, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 18:59:46,400 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 65 states. [2020-12-22 18:59:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:51,770 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-12-22 18:59:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 18:59:51,771 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 176 [2020-12-22 18:59:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:51,774 INFO L225 Difference]: With dead ends: 183 [2020-12-22 18:59:51,774 INFO L226 Difference]: Without dead ends: 183 [2020-12-22 18:59:51,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=957, Invalid=6699, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 18:59:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-22 18:59:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2020-12-22 18:59:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 18:59:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-12-22 18:59:51,779 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 176 [2020-12-22 18:59:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:51,780 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-12-22 18:59:51,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 18:59:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-12-22 18:59:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-22 18:59:51,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:51,781 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:51,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:51,989 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:59:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1695111260, now seen corresponding path program 36 times [2020-12-22 18:59:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:51,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423202393] [2020-12-22 18:59:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:59:54,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423202393] [2020-12-22 18:59:54,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954006031] [2020-12-22 18:59:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:03,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 19:00:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 194 conjunts are in the unsatisfiable core [2020-12-22 19:00:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:03,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:00:03,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:03,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:03,646 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:03,647 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:00:13,252 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2020-12-22 19:00:13,254 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:13,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:13,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:13,262 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2020-12-22 19:00:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 38 proven. 1558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:13,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:13,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 64] total 105 [2020-12-22 19:00:13,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202149881] [2020-12-22 19:00:13,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-12-22 19:00:13,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-12-22 19:00:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=10503, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 19:00:13,577 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 105 states. [2020-12-22 19:00:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:33,307 INFO L93 Difference]: Finished difference Result 286 states and 288 transitions. [2020-12-22 19:00:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 19:00:33,316 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 181 [2020-12-22 19:00:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:33,318 INFO L225 Difference]: With dead ends: 286 [2020-12-22 19:00:33,319 INFO L226 Difference]: Without dead ends: 189 [2020-12-22 19:00:33,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4150 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=1145, Invalid=26577, Unknown=0, NotChecked=0, Total=27722 [2020-12-22 19:00:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-22 19:00:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2020-12-22 19:00:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 19:00:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-12-22 19:00:33,336 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 181 [2020-12-22 19:00:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:33,336 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-12-22 19:00:33,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-12-22 19:00:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-12-22 19:00:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-22 19:00:33,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:33,338 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:33,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:33,539 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:33,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1426409055, now seen corresponding path program 37 times [2020-12-22 19:00:33,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:33,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445322005] [2020-12-22 19:00:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 630 proven. 1043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:36,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445322005] [2020-12-22 19:00:36,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741665587] [2020-12-22 19:00:36,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 189 conjunts are in the unsatisfiable core [2020-12-22 19:00:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 722 proven. 951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:38,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:38,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 69 [2020-12-22 19:00:38,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288282266] [2020-12-22 19:00:38,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 19:00:38,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 19:00:38,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=4118, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 19:00:38,767 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 70 states. [2020-12-22 19:00:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:44,948 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-12-22 19:00:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 19:00:44,950 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 185 [2020-12-22 19:00:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:44,951 INFO L225 Difference]: With dead ends: 192 [2020-12-22 19:00:44,951 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 19:00:44,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1861, Invalid=6881, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 19:00:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 19:00:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-12-22 19:00:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 19:00:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-12-22 19:00:44,957 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2020-12-22 19:00:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:44,957 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-12-22 19:00:44,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 19:00:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-12-22 19:00:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-22 19:00:44,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:44,959 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:45,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 19:00:45,174 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:45,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash 449126907, now seen corresponding path program 38 times [2020-12-22 19:00:45,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:45,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000795725] [2020-12-22 19:00:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat