/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:39:25,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:39:25,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:39:25,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:39:25,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:39:25,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:39:25,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:39:25,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:39:25,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:39:25,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:39:25,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:39:25,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:39:25,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:39:25,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:39:25,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:39:25,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:39:25,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:39:25,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:39:25,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:39:25,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:39:25,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:39:25,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:39:25,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:39:25,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:39:25,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:39:25,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:39:25,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:39:25,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:39:25,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:39:25,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:39:25,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:39:25,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:39:25,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:39:25,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:39:25,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:39:25,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:39:25,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:39:25,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:39:25,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:39:25,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:39:25,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:39:25,555 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 [2020-07-21 11:39:25,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:39:25,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:39:25,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:39:25,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:39:25,573 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:39:25,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:39:25,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:39:25,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:39:25,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:39:25,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:39:25,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:39:25,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:39:25,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:39:25,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:39:25,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:39:25,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:39:25,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:39:25,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:39:25,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:39:25,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:39:25,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:39:25,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:39:25,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:39:25,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:39:25,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:39:25,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:39:25,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:25,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:39:25,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:39:25,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:39:25,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:39:25,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:39:25,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:39:25,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:39:25,878 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:39:25,879 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 11:39:25,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f879eb665/8ae8eba010ee40d5b95167afbebd1720/FLAGaac5dfb7d [2020-07-21 11:39:26,436 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:39:26,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-21 11:39:26,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f879eb665/8ae8eba010ee40d5b95167afbebd1720/FLAGaac5dfb7d [2020-07-21 11:39:26,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f879eb665/8ae8eba010ee40d5b95167afbebd1720 [2020-07-21 11:39:26,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:39:26,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:39:26,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:26,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:39:26,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:39:26,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:26" (1/1) ... [2020-07-21 11:39:26,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518c2b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:26, skipping insertion in model container [2020-07-21 11:39:26,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:26" (1/1) ... [2020-07-21 11:39:26,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:39:26,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:39:27,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:27,129 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:39:27,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:27,297 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:39:27,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27 WrapperNode [2020-07-21 11:39:27,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:27,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:39:27,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:39:27,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:39:27,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (1/1) ... [2020-07-21 11:39:27,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:39:27,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:39:27,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:39:27,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:39:27,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (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 [2020-07-21 11:39:27,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:39:27,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:39:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:39:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-21 11:39:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:39:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-21 11:39:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:39:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:39:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-21 11:39:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-21 11:39:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:39:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 11:39:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 11:39:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:39:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:39:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:39:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:39:27,939 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:39:27,940 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-21 11:39:27,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:27 BoogieIcfgContainer [2020-07-21 11:39:27,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:39:27,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:39:27,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:39:27,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:39:27,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:39:26" (1/3) ... [2020-07-21 11:39:27,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b62009c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:27, skipping insertion in model container [2020-07-21 11:39:27,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:27" (2/3) ... [2020-07-21 11:39:27,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b62009c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:27, skipping insertion in model container [2020-07-21 11:39:27,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:27" (3/3) ... [2020-07-21 11:39:27,955 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-21 11:39:27,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:39:27,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:39:27,990 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:39:28,014 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:39:28,014 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:39:28,014 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:39:28,015 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:39:28,015 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:39:28,015 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:39:28,015 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:39:28,015 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:39:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-21 11:39:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 11:39:28,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:28,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:28,044 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-21 11:39:28,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:28,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537952936] [2020-07-21 11:39:28,059 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:39:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:28,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:28,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537952936] [2020-07-21 11:39:28,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:28,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:39:28,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797723769] [2020-07-21 11:39:28,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:39:28,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:28,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:39:28,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:28,212 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2020-07-21 11:39:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:28,248 INFO L93 Difference]: Finished difference Result 122 states and 178 transitions. [2020-07-21 11:39:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:39:28,250 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 11:39:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:28,259 INFO L225 Difference]: With dead ends: 122 [2020-07-21 11:39:28,259 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 11:39:28,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 11:39:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 11:39:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 11:39:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 11:39:28,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-21 11:39:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:28,304 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 11:39:28,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:39:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 11:39:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 11:39:28,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:28,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:28,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:28,519 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-21 11:39:28,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:28,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749709797] [2020-07-21 11:39:28,521 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:39:28,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:28,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:28,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749709797] [2020-07-21 11:39:28,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:28,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:39:28,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267698576] [2020-07-21 11:39:28,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:39:28,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:39:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:28,633 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-07-21 11:39:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:28,696 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-07-21 11:39:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:39:28,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-21 11:39:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:28,698 INFO L225 Difference]: With dead ends: 38 [2020-07-21 11:39:28,698 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 11:39:28,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:28,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 11:39:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-07-21 11:39:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 11:39:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-21 11:39:28,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-21 11:39:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:28,706 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-21 11:39:28,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:39:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-21 11:39:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:39:28,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:28,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:28,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:28,909 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-21 11:39:28,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:28,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611232544] [2020-07-21 11:39:28,912 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:39:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:29,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:29,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611232544] [2020-07-21 11:39:29,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:29,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 11:39:29,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565095516] [2020-07-21 11:39:29,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:39:29,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:29,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:39:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:39:29,094 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-07-21 11:39:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:29,184 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-21 11:39:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:39:29,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-21 11:39:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:29,186 INFO L225 Difference]: With dead ends: 48 [2020-07-21 11:39:29,186 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 11:39:29,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:39:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 11:39:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 11:39:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:39:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 11:39:29,194 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-21 11:39:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:29,194 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 11:39:29,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:39:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 11:39:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:39:29,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:29,196 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:29,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:29,410 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:29,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1296658810, now seen corresponding path program 2 times [2020-07-21 11:39:29,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:29,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576316042] [2020-07-21 11:39:29,411 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:39:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:29,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:29,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576316042] [2020-07-21 11:39:29,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:29,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 11:39:29,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779677153] [2020-07-21 11:39:29,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 11:39:29,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:29,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 11:39:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:39:29,698 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-07-21 11:39:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:29,813 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-07-21 11:39:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:39:29,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-07-21 11:39:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:29,816 INFO L225 Difference]: With dead ends: 68 [2020-07-21 11:39:29,816 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 11:39:29,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:39:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 11:39:29,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 11:39:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 11:39:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-07-21 11:39:29,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2020-07-21 11:39:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:29,836 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-07-21 11:39:29,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 11:39:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-07-21 11:39:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 11:39:29,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:29,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:30,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:30,055 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1360264712, now seen corresponding path program 3 times [2020-07-21 11:39:30,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:30,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178795441] [2020-07-21 11:39:30,058 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:39:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-21 11:39:30,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:30,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178795441] [2020-07-21 11:39:30,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:30,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:39:30,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76136630] [2020-07-21 11:39:30,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:39:30,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:30,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:39:30,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:30,153 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 4 states. [2020-07-21 11:39:30,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:30,200 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2020-07-21 11:39:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:39:30,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-07-21 11:39:30,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:30,204 INFO L225 Difference]: With dead ends: 115 [2020-07-21 11:39:30,204 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 11:39:30,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 11:39:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2020-07-21 11:39:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 11:39:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-21 11:39:30,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 36 [2020-07-21 11:39:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:30,221 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-21 11:39:30,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:39:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-21 11:39:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 11:39:30,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:30,223 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:30,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:30,437 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash -850791622, now seen corresponding path program 1 times [2020-07-21 11:39:30,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:30,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425128474] [2020-07-21 11:39:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:30,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:39:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:30,519 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:39:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 11:39:30,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:30,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425128474] [2020-07-21 11:39:30,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:30,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:39:30,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553338307] [2020-07-21 11:39:30,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:39:30,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:39:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:39:30,545 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 5 states. [2020-07-21 11:39:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:30,596 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-07-21 11:39:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:39:30,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-21 11:39:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:30,599 INFO L225 Difference]: With dead ends: 76 [2020-07-21 11:39:30,599 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 11:39:30,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:39:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 11:39:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-21 11:39:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 11:39:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-21 11:39:30,611 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2020-07-21 11:39:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:30,612 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-21 11:39:30,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:39:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-21 11:39:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 11:39:30,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:30,614 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:30,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:30,830 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:30,831 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 1 times [2020-07-21 11:39:30,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:30,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655693276] [2020-07-21 11:39:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:39:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 11:39:30,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 11:39:31,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655693276] [2020-07-21 11:39:31,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:31,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 11:39:31,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994849786] [2020-07-21 11:39:31,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:39:31,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:39:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:39:31,020 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-21 11:39:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:31,132 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-21 11:39:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:39:31,134 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 11:39:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:31,137 INFO L225 Difference]: With dead ends: 168 [2020-07-21 11:39:31,137 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 11:39:31,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:39:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 11:39:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-21 11:39:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 11:39:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-21 11:39:31,154 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-21 11:39:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:31,157 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-21 11:39:31,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:39:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-21 11:39:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 11:39:31,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:31,160 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:31,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:31,361 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 2 times [2020-07-21 11:39:31,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:31,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332911258] [2020-07-21 11:39:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:39:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:31,449 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:39:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 11:39:31,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:31,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:39:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 11:39:31,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332911258] [2020-07-21 11:39:31,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:31,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 11:39:31,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617758494] [2020-07-21 11:39:31,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:39:31,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:39:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:39:31,514 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 8 states. [2020-07-21 11:39:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:31,630 INFO L93 Difference]: Finished difference Result 167 states and 201 transitions. [2020-07-21 11:39:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:39:31,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-21 11:39:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:31,637 INFO L225 Difference]: With dead ends: 167 [2020-07-21 11:39:31,637 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 11:39:31,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:39:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 11:39:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-07-21 11:39:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 11:39:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2020-07-21 11:39:31,676 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 69 [2020-07-21 11:39:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:31,677 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2020-07-21 11:39:31,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:39:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2020-07-21 11:39:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 11:39:31,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:31,686 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:31,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:31,902 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash 419958136, now seen corresponding path program 3 times [2020-07-21 11:39:31,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:31,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103608650] [2020-07-21 11:39:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:39:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1019 proven. 297 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-07-21 11:39:32,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 1007 proven. 297 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-07-21 11:39:32,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103608650] [2020-07-21 11:39:32,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:32,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 11:39:32,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805908560] [2020-07-21 11:39:32,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 11:39:32,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 11:39:32,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-21 11:39:32,213 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 11 states. [2020-07-21 11:39:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:32,420 INFO L93 Difference]: Finished difference Result 303 states and 358 transitions. [2020-07-21 11:39:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:39:32,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 168 [2020-07-21 11:39:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:32,426 INFO L225 Difference]: With dead ends: 303 [2020-07-21 11:39:32,426 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 11:39:32,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:39:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 11:39:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-07-21 11:39:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 11:39:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-07-21 11:39:32,462 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 168 [2020-07-21 11:39:32,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:32,463 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-07-21 11:39:32,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 11:39:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-07-21 11:39:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 11:39:32,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:32,466 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:32,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:32,679 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 4 times [2020-07-21 11:39:32,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:32,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100914792] [2020-07-21 11:39:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 11:39:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 838 proven. 768 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-21 11:39:32,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 828 proven. 768 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 11:39:32,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100914792] [2020-07-21 11:39:33,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:33,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-21 11:39:33,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656973281] [2020-07-21 11:39:33,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 11:39:33,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:33,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 11:39:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:39:33,002 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 14 states. [2020-07-21 11:39:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:33,381 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-07-21 11:39:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 11:39:33,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-21 11:39:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:33,384 INFO L225 Difference]: With dead ends: 268 [2020-07-21 11:39:33,385 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 11:39:33,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-07-21 11:39:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 11:39:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2020-07-21 11:39:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 11:39:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2020-07-21 11:39:33,420 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 168 [2020-07-21 11:39:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:33,421 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2020-07-21 11:39:33,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 11:39:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2020-07-21 11:39:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 11:39:33,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:33,426 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:33,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:33,641 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 5 times [2020-07-21 11:39:33,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:33,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795142633] [2020-07-21 11:39:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:33,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 11:39:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-21 11:39:33,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-21 11:39:34,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795142633] [2020-07-21 11:39:34,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:34,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2020-07-21 11:39:34,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443656783] [2020-07-21 11:39:34,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:39:34,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:34,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:39:34,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:39:34,015 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand 17 states. [2020-07-21 11:39:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:34,640 INFO L93 Difference]: Finished difference Result 271 states and 313 transitions. [2020-07-21 11:39:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 11:39:34,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-07-21 11:39:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:34,646 INFO L225 Difference]: With dead ends: 271 [2020-07-21 11:39:34,646 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 11:39:34,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-07-21 11:39:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 11:39:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2020-07-21 11:39:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 11:39:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 211 transitions. [2020-07-21 11:39:34,659 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 211 transitions. Word has length 168 [2020-07-21 11:39:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:34,661 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 211 transitions. [2020-07-21 11:39:34,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:39:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 211 transitions. [2020-07-21 11:39:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-21 11:39:34,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:34,664 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 25, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:34,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:34,879 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2135886202, now seen corresponding path program 6 times [2020-07-21 11:39:34,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:34,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898918611] [2020-07-21 11:39:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 11:39:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:35,006 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:39:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-21 11:39:35,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:39:35,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:39:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-21 11:39:35,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898918611] [2020-07-21 11:39:35,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:39:35,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 11:39:35,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826229796] [2020-07-21 11:39:35,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 11:39:35,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 11:39:35,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:39:35,193 INFO L87 Difference]: Start difference. First operand 184 states and 211 transitions. Second operand 14 states. [2020-07-21 11:39:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:35,430 INFO L93 Difference]: Finished difference Result 345 states and 414 transitions. [2020-07-21 11:39:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:39:35,431 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 168 [2020-07-21 11:39:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:35,433 INFO L225 Difference]: With dead ends: 345 [2020-07-21 11:39:35,434 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 11:39:35,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:39:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 11:39:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2020-07-21 11:39:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-07-21 11:39:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 410 transitions. [2020-07-21 11:39:35,454 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 410 transitions. Word has length 168 [2020-07-21 11:39:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:35,455 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 410 transitions. [2020-07-21 11:39:35,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 11:39:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 410 transitions. [2020-07-21 11:39:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-21 11:39:35,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:35,461 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 61, 11, 11, 11, 11, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:35,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:35,675 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1434461414, now seen corresponding path program 7 times [2020-07-21 11:39:35,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:35,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841190784] [2020-07-21 11:39:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:39:35,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 7345 proven. 0 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2020-07-21 11:39:36,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:36,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841190784] [2020-07-21 11:39:36,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:36,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 11:39:36,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830772348] [2020-07-21 11:39:36,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:39:36,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:39:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:39:36,054 INFO L87 Difference]: Start difference. First operand 341 states and 410 transitions. Second operand 9 states. [2020-07-21 11:39:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:36,183 INFO L93 Difference]: Finished difference Result 345 states and 413 transitions. [2020-07-21 11:39:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:39:36,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2020-07-21 11:39:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:36,185 INFO L225 Difference]: With dead ends: 345 [2020-07-21 11:39:36,185 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:39:36,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:39:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:39:36,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:39:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:39:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:39:36,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 366 [2020-07-21 11:39:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:36,189 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:39:36,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:39:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:39:36,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:39:36,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:36,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:39:36,690 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-21 11:39:36,838 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-07-21 11:39:37,046 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 11:39:37,074 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-21 11:39:37,074 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-21 11:39:37,074 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-21 11:39:37,075 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-21 11:39:37,075 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-21 11:39:37,075 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-21 11:39:37,075 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-21 11:39:37,075 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-21 11:39:37,075 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-21 11:39:37,075 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-21 11:39:37,075 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-21 11:39:37,076 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-21 11:39:37,076 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-21 11:39:37,076 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-21 11:39:37,076 INFO L271 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: true [2020-07-21 11:39:37,076 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-21 11:39:37,076 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-21 11:39:37,076 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-21 11:39:37,076 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-21 11:39:37,077 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-21 11:39:37,077 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-21 11:39:37,077 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-21 11:39:37,077 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-21 11:39:37,077 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-21 11:39:37,077 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-21 11:39:37,077 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-21 11:39:37,077 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-21 11:39:37,078 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-21 11:39:37,078 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-21 11:39:37,078 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-21 11:39:37,078 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-21 11:39:37,078 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-21 11:39:37,078 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-21 11:39:37,078 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:39:37,078 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:39:37,078 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:39:37,079 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-21 11:39:37,079 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-21 11:39:37,079 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-21 11:39:37,079 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-21 11:39:37,079 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-21 11:39:37,079 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:39:37,079 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:39:37,080 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:39:37,080 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:39:37,080 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-21 11:39:37,080 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-21 11:39:37,080 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-21 11:39:37,080 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-21 11:39:37,081 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 4 main_~i~0)) (and .cse0 .cse1 (= 0 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (< main_~i~0 47) (<= 6 main_~i~0)))) [2020-07-21 11:39:37,081 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-21 11:39:37,081 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-21 11:39:37,081 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 11:39:37,081 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-21 11:39:37,081 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: true [2020-07-21 11:39:37,081 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-21 11:39:37,082 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-21 11:39:37,082 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 5)) (.cse1 (<= 5 main_~n~0))) (or (and .cse0 .cse1 (= 0 main_~i~0)) (and .cse0 (<= main_~i~0 4) .cse1 (<= 4 main_~i~0)) (and (= 2 main_~i~0) .cse0 .cse1) (and .cse0 .cse1 (<= main_~i~0 1) (<= 1 main_~i~0)) (and .cse0 (<= 5 main_~i~0) .cse1 (< main_~i~0 46)) (and (= 3 main_~i~0) .cse0 .cse1))) [2020-07-21 11:39:37,082 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 11:39:37,082 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 11:39:37,082 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 11:39:37,083 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 11:39:37,083 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 11:39:37,083 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 11:39:37,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:39:37 BoogieIcfgContainer [2020-07-21 11:39:37,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:39:37,107 INFO L168 Benchmark]: Toolchain (without parser) took 10243.61 ms. Allocated memory was 137.4 MB in the beginning and 361.8 MB in the end (delta: 224.4 MB). Free memory was 102.1 MB in the beginning and 150.4 MB in the end (delta: -48.3 MB). Peak memory consumption was 176.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:37,108 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:39:37,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.70 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 101.6 MB in the beginning and 178.1 MB in the end (delta: -76.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:37,110 INFO L168 Benchmark]: Boogie Preprocessor took 71.69 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 175.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:37,110 INFO L168 Benchmark]: RCFGBuilder took 573.93 ms. Allocated memory is still 201.3 MB. Free memory was 175.4 MB in the beginning and 147.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:37,111 INFO L168 Benchmark]: TraceAbstraction took 9158.84 ms. Allocated memory was 201.3 MB in the beginning and 361.8 MB in the end (delta: 160.4 MB). Free memory was 147.6 MB in the beginning and 150.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 157.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:37,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 431.70 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 101.6 MB in the beginning and 178.1 MB in the end (delta: -76.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.69 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 175.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 573.93 ms. Allocated memory is still 201.3 MB. Free memory was 175.4 MB in the beginning and 147.6 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9158.84 ms. Allocated memory was 201.3 MB in the beginning and 361.8 MB in the end (delta: 160.4 MB). Free memory was 147.6 MB in the beginning and 150.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 157.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: ((((((n <= 5 && 5 <= n) && 0 == i) || (((n <= 5 && i <= 4) && 5 <= n) && 4 <= i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n) - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: (((((((n <= 5 && 5 <= n) && 4 == i) || ((n <= 5 && 5 <= n) && 0 == i)) || ((2 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i <= 1) && 1 <= i)) || (((n <= 5 && 5 <= i) && 5 <= n) && i < 46)) || ((3 == i && n <= 5) && 5 <= n)) || (((n <= 5 && 5 <= n) && i < 47) && 6 <= i) - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 13, TraceHistogramMax: 66, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 342 SDtfs, 304 SDslu, 1166 SDs, 0 SdLazy, 2009 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2183 GetRequests, 2061 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=341occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 239 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 55 PreInvPairs, 121 NumberOfFragments, 238 HoareAnnotationTreeSize, 55 FomulaSimplifications, 2172 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 21 FomulaSimplificationsInter, 87 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1316 NumberOfCodeBlocks, 1316 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2149 ConstructedInterpolants, 0 QuantifiedInterpolants, 1139471 SizeOfPredicates, 24 NumberOfNonLiveVariables, 3199 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 18135/26835 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...