/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:58:18,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:58:18,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:58:18,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:58:18,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:58:18,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:58:18,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:58:18,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:58:18,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:58:18,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:58:18,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:58:18,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:58:18,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:58:18,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:58:18,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:58:18,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:58:18,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:58:18,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:58:18,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:58:18,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:58:18,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:58:18,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:58:18,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:58:18,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:58:19,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 03:58:19,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 03:58:19,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 03:58:19,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 03:58:19,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 03:58:19,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 03:58:19,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 03:58:19,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 03:58:19,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 03:58:19,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 03:58:19,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 03:58:19,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 03:58:19,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 03:58:19,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 03:58:19,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:58:19,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:58:19,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:58:19,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:58:19,029 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:58:19,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:58:19,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:58:19,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:58:19,032 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:58:19,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:58:19,032 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:58:19,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:58:19,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:58:19,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:58:19,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:58:19,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:58:19,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:58:19,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:58:19,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:58:19,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:58:19,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:58:19,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:58:19,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:58:19,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:58:19,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:58:19,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:58:19,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:58:19,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:58:19,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:58:19,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:58:19,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:58:19,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:58:19,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:58:19,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:58:19,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:58:19,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:58:19,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:58:19,367 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:58:19,367 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:58:19,368 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-20 03:58:19,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97e977a36/f47122c48f5241478350dc3460c41fbf/FLAG865b92d03 [2020-07-20 03:58:19,869 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:58:19,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-20 03:58:19,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97e977a36/f47122c48f5241478350dc3460c41fbf/FLAG865b92d03 [2020-07-20 03:58:20,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97e977a36/f47122c48f5241478350dc3460c41fbf [2020-07-20 03:58:20,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:58:20,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:58:20,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:58:20,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:58:20,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:58:20,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3313f816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20, skipping insertion in model container [2020-07-20 03:58:20,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:58:20,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:58:20,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:58:20,539 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:58:20,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:58:20,599 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:58:20,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20 WrapperNode [2020-07-20 03:58:20,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:58:20,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:58:20,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:58:20,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:58:20,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (1/1) ... [2020-07-20 03:58:20,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:58:20,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:58:20,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:58:20,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:58:20,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (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 [2020-07-20 03:58:20,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:58:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:58:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 03:58:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:58:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:58:20,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:58:20,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 03:58:20,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 03:58:20,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:58:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 03:58:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:58:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:58:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:58:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:58:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:58:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:58:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:58:21,464 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:58:21,465 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-20 03:58:21,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:58:21 BoogieIcfgContainer [2020-07-20 03:58:21,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:58:21,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:58:21,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:58:21,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:58:21,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:58:20" (1/3) ... [2020-07-20 03:58:21,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167c999f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:58:21, skipping insertion in model container [2020-07-20 03:58:21,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:20" (2/3) ... [2020-07-20 03:58:21,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167c999f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:58:21, skipping insertion in model container [2020-07-20 03:58:21,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:58:21" (3/3) ... [2020-07-20 03:58:21,479 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-20 03:58:21,490 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:58:21,500 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:58:21,517 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:58:21,543 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:58:21,544 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:58:21,544 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:58:21,544 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:58:21,544 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:58:21,545 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:58:21,545 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:58:21,545 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:58:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 03:58:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 03:58:21,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:21,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:21,580 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-20 03:58:21,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:21,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178354738] [2020-07-20 03:58:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:21,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178354738] [2020-07-20 03:58:21,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:21,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:58:21,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786343764] [2020-07-20 03:58:21,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 03:58:21,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:21,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 03:58:21,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:58:21,839 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-07-20 03:58:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:22,033 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-20 03:58:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 03:58:22,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 03:58:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:22,047 INFO L225 Difference]: With dead ends: 73 [2020-07-20 03:58:22,048 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:58:22,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 03:58:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:58:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-20 03:58:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:58:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-20 03:58:22,103 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-20 03:58:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:22,103 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-20 03:58:22,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 03:58:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-20 03:58:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:58:22,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:22,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:22,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:58:22,106 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:22,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-20 03:58:22,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:22,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437186745] [2020-07-20 03:58:22,108 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:58:22,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437186745] [2020-07-20 03:58:22,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999643217] [2020-07-20 03:58:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75cfba56 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:22,284 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75cfba56 issued 3 check-sat command(s) [2020-07-20 03:58:22,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 03:58:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:58:22,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:22,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-20 03:58:22,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390636106] [2020-07-20 03:58:22,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:58:22,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:58:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:58:22,346 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-20 03:58:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:22,478 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-20 03:58:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:58:22,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 03:58:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:22,481 INFO L225 Difference]: With dead ends: 65 [2020-07-20 03:58:22,481 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 03:58:22,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:58:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 03:58:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-07-20 03:58:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 03:58:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-20 03:58:22,492 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2020-07-20 03:58:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:22,493 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-20 03:58:22,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:58:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-20 03:58:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 03:58:22,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:22,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:22,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:58:22,710 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1067646812, now seen corresponding path program 2 times [2020-07-20 03:58:22,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:22,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236916992] [2020-07-20 03:58:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:58:22,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236916992] [2020-07-20 03:58:22,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880384703] [2020-07-20 03:58:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77183f19 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 [2020-07-20 03:58:22,901 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77183f19 issued 3 check-sat command(s) [2020-07-20 03:58:22,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:22,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:58:22,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:58:22,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:22,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 03:58:22,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865671567] [2020-07-20 03:58:22,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:58:22,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:58:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:58:22,928 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-07-20 03:58:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:23,058 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-07-20 03:58:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:58:23,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-07-20 03:58:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:23,060 INFO L225 Difference]: With dead ends: 75 [2020-07-20 03:58:23,060 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 03:58:23,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:58:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 03:58:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-07-20 03:58:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 03:58:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-20 03:58:23,070 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-07-20 03:58:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:23,071 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-20 03:58:23,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:58:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-20 03:58:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 03:58:23,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:23,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:23,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:23,288 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1245957476, now seen corresponding path program 3 times [2020-07-20 03:58:23,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:23,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843697139] [2020-07-20 03:58:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 03:58:23,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843697139] [2020-07-20 03:58:23,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862875704] [2020-07-20 03:58:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dcb4977 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:23,553 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dcb4977 issued 3 check-sat command(s) [2020-07-20 03:58:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:58:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 03:58:23,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:23,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 03:58:23,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259323149] [2020-07-20 03:58:23,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:58:23,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:23,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:58:23,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:23,579 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-07-20 03:58:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:23,727 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-07-20 03:58:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:58:23,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-07-20 03:58:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:23,730 INFO L225 Difference]: With dead ends: 85 [2020-07-20 03:58:23,730 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:58:23,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:58:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-20 03:58:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 03:58:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-20 03:58:23,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-07-20 03:58:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:23,740 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-20 03:58:23,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:58:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-20 03:58:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 03:58:23,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:23,742 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:23,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:23,958 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 4 times [2020-07-20 03:58:23,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:23,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702093990] [2020-07-20 03:58:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 03:58:24,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702093990] [2020-07-20 03:58:24,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870748267] [2020-07-20 03:58:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d4b035b 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 [2020-07-20 03:58:24,174 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d4b035b issued 3 check-sat command(s) [2020-07-20 03:58:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:58:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 03:58:24,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:24,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-20 03:58:24,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822575279] [2020-07-20 03:58:24,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:58:24,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:24,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:58:24,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:58:24,202 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 9 states. [2020-07-20 03:58:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:24,386 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-20 03:58:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:58:24,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-07-20 03:58:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:24,389 INFO L225 Difference]: With dead ends: 93 [2020-07-20 03:58:24,389 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:58:24,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:58:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:58:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-20 03:58:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 03:58:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-20 03:58:24,398 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-20 03:58:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:24,399 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-20 03:58:24,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:58:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-20 03:58:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 03:58:24,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:24,400 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:24,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:24,613 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 5 times [2020-07-20 03:58:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:24,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413245529] [2020-07-20 03:58:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 03:58:24,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413245529] [2020-07-20 03:58:24,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:24,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 03:58:24,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123370943] [2020-07-20 03:58:24,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:58:24,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:24,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:58:24,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:24,822 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-07-20 03:58:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:24,942 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 03:58:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:58:24,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-07-20 03:58:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:24,944 INFO L225 Difference]: With dead ends: 62 [2020-07-20 03:58:24,944 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:58:24,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:58:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:58:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:58:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:58:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-20 03:58:24,951 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-07-20 03:58:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:24,952 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-20 03:58:24,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:58:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-20 03:58:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 03:58:24,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:24,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:24,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 03:58:24,954 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-07-20 03:58:24,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:24,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387337654] [2020-07-20 03:58:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 03:58:25,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387337654] [2020-07-20 03:58:25,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794999249] [2020-07-20 03:58:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@568e13e4 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 [2020-07-20 03:58:25,302 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@568e13e4 issued 4 check-sat command(s) [2020-07-20 03:58:25,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:58:25,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:25,361 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:58:25,366 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:58:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 03:58:25,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:58:25,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2020-07-20 03:58:25,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180576860] [2020-07-20 03:58:25,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:58:25,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:25,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:58:25,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:58:25,395 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-07-20 03:58:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:25,505 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-20 03:58:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:58:25,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-20 03:58:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:25,507 INFO L225 Difference]: With dead ends: 56 [2020-07-20 03:58:25,508 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 03:58:25,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:58:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 03:58:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-20 03:58:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 03:58:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-20 03:58:25,517 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-07-20 03:58:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:25,517 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-20 03:58:25,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:58:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-20 03:58:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 03:58:25,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:25,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:25,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 03:58:25,728 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-07-20 03:58:25,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:25,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970992502] [2020-07-20 03:58:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 03:58:25,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970992502] [2020-07-20 03:58:25,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:25,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:58:25,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446839726] [2020-07-20 03:58:25,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:58:25,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:58:25,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:58:25,851 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-07-20 03:58:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:25,912 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-20 03:58:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:58:25,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-07-20 03:58:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:25,914 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:58:25,914 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:58:25,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:58:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:58:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:58:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:58:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-07-20 03:58:25,922 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-07-20 03:58:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:25,923 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-07-20 03:58:25,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:58:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-07-20 03:58:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 03:58:25,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:25,924 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:25,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 03:58:25,925 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-07-20 03:58:25,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:25,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693509219] [2020-07-20 03:58:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 03:58:26,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693509219] [2020-07-20 03:58:26,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127082245] [2020-07-20 03:58:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35887878 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 [2020-07-20 03:58:26,200 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35887878 issued 4 check-sat command(s) [2020-07-20 03:58:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:26,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 03:58:26,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:26,264 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:58:26,266 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:58:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 03:58:26,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:26,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-20 03:58:26,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054494106] [2020-07-20 03:58:26,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:58:26,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:26,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:58:26,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:58:26,305 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 15 states. [2020-07-20 03:58:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:26,485 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-07-20 03:58:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:58:26,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-07-20 03:58:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:26,487 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:58:26,487 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 03:58:26,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:58:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 03:58:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-20 03:58:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 03:58:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-07-20 03:58:26,495 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 50 [2020-07-20 03:58:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:26,495 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-07-20 03:58:26,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:58:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-07-20 03:58:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 03:58:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:26,497 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:26,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:26,710 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:26,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1926047290, now seen corresponding path program 2 times [2020-07-20 03:58:26,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:26,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679585250] [2020-07-20 03:58:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 [2020-07-20 03:58:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 03:58:26,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679585250] [2020-07-20 03:58:26,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632654452] [2020-07-20 03:58:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fde5331 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:27,103 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fde5331 issued 4 check-sat command(s) [2020-07-20 03:58:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:58:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:27,133 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-07-20 03:58:27,134 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:58:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 03:58:27,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:58:27,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2020-07-20 03:58:27,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195144598] [2020-07-20 03:58:27,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:58:27,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:58:27,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:58:27,165 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 5 states. [2020-07-20 03:58:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:27,184 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-07-20 03:58:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:58:27,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-07-20 03:58:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:27,185 INFO L225 Difference]: With dead ends: 53 [2020-07-20 03:58:27,185 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 03:58:27,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:58:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 03:58:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 03:58:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 03:58:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 03:58:27,188 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-07-20 03:58:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:27,188 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 03:58:27,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:58:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 03:58:27,189 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 03:58:27,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 03:58:27,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 03:58:27,558 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:58:27,559 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-20 03:58:27,559 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:58:27,559 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 03:58:27,559 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 03:58:27,559 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 03:58:27,560 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 03:58:27,560 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 03:58:27,560 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 03:58:27,560 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 03:58:27,560 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 03:58:27,560 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (and (<= 0 main_~nc_B~0) (= 0 main_~found~0)) [2020-07-20 03:58:27,562 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-20 03:58:27,563 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-20 03:58:27,563 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 03:58:27,563 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-20 03:58:27,564 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-20 03:58:27,564 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 03:58:27,564 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (and (<= 1 main_~nc_B~0) (= 0 main_~found~0)) (and (= 0 main_~nc_B~0) (<= 0 main_~j~0))) [2020-07-20 03:58:27,564 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 03:58:27,565 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-20 03:58:27,565 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= 1 main_~found~0))) (or (and (or .cse0 (= 0 main_~found~0)) (<= 1 main_~nc_B~0)) (and .cse0 (= 0 main_~nc_B~0) (<= 0 main_~j~0)))) [2020-07-20 03:58:27,565 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-20 03:58:27,565 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-20 03:58:27,565 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-20 03:58:27,565 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-20 03:58:27,566 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-20 03:58:27,566 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 03:58:27,566 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-20 03:58:27,566 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-20 03:58:27,566 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 03:58:27,566 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-20 03:58:27,566 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-20 03:58:27,567 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 03:58:27,567 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 03:58:27,567 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 03:58:27,568 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 03:58:27,569 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 03:58:27,571 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 03:58:27,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:58:27 BoogieIcfgContainer [2020-07-20 03:58:27,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:58:27,613 INFO L168 Benchmark]: Toolchain (without parser) took 7298.83 ms. Allocated memory was 137.4 MB in the beginning and 249.6 MB in the end (delta: 112.2 MB). Free memory was 101.0 MB in the beginning and 100.3 MB in the end (delta: 674.3 kB). Peak memory consumption was 112.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:27,615 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 03:58:27,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.56 ms. Allocated memory is still 137.4 MB. Free memory was 100.5 MB in the beginning and 89.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:27,619 INFO L168 Benchmark]: Boogie Preprocessor took 193.90 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 89.9 MB in the beginning and 178.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:27,621 INFO L168 Benchmark]: RCFGBuilder took 670.48 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 158.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:27,622 INFO L168 Benchmark]: TraceAbstraction took 6128.92 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 158.1 MB in the beginning and 100.3 MB in the end (delta: 57.8 MB). Peak memory consumption was 106.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:58:27,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.56 ms. Allocated memory is still 137.4 MB. Free memory was 100.5 MB in the beginning and 89.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 193.90 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 89.9 MB in the beginning and 178.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 670.48 ms. Allocated memory is still 200.8 MB. Free memory was 178.0 MB in the beginning and 158.8 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6128.92 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 158.1 MB in the beginning and 100.3 MB in the end (delta: 57.8 MB). Peak memory consumption was 106.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (1 <= nc_B && 0 == found) || (0 == nc_B && 0 <= j) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 <= nc_B && 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 257 SDtfs, 187 SDslu, 671 SDs, 0 SdLazy, 730 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 69 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 22 PreInvPairs, 50 NumberOfFragments, 69 HoareAnnotationTreeSize, 22 FomulaSimplifications, 327 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 54 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 682 NumberOfCodeBlocks, 648 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 665 ConstructedInterpolants, 0 QuantifiedInterpolants, 44747 SizeOfPredicates, 16 NumberOfNonLiveVariables, 875 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 484/555 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...