/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:17:34,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:17:34,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:17:34,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:17:34,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:17:34,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:17:34,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:17:34,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:17:34,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:17:34,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:17:34,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:17:34,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:17:34,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:17:34,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:17:34,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:17:34,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:17:34,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:17:34,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:17:34,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:17:34,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:17:34,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:17:34,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:17:34,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:17:34,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:17:34,682 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:17:34,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:17:34,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:17:34,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:17:34,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:17:34,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:17:34,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:17:34,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:17:34,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:17:34,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:17:34,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:17:34,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:17:34,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:17:34,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:17:34,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:17:34,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:17:34,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:17:34,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:17:34,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:17:34,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:17:34,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:17:34,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:17:34,743 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:17:34,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:17:34,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:17:34,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:17:34,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:17:34,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:17:34,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:17:34,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:17:34,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:17:34,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:17:34,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:17:34,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:17:34,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:17:34,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:17:34,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:17:34,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:17:34,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:17:34,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:17:34,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:17:34,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:17:34,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:17:34,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:17:34,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:17:34,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:17:34,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:17:34,750 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:17:35,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:17:35,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:17:35,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:17:35,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:17:35,068 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:17:35,069 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-21 18:17:35,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44ce1a7fe/cfa7e59fdab044e3906ee43df1e1aa30/FLAG038dc93ef [2020-08-21 18:17:35,574 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:17:35,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-21 18:17:35,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44ce1a7fe/cfa7e59fdab044e3906ee43df1e1aa30/FLAG038dc93ef [2020-08-21 18:17:35,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44ce1a7fe/cfa7e59fdab044e3906ee43df1e1aa30 [2020-08-21 18:17:36,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:17:36,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:17:36,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:17:36,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:17:36,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:17:36,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c46e88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36, skipping insertion in model container [2020-08-21 18:17:36,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:17:36,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:17:36,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:17:36,232 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:17:36,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:17:36,266 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:17:36,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36 WrapperNode [2020-08-21 18:17:36,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:17:36,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:17:36,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:17:36,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:17:36,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... [2020-08-21 18:17:36,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:17:36,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:17:36,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:17:36,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:17:36,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 18:17:36,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:17:36,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:17:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:17:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:17:36,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:17:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:17:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:17:36,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:17:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:17:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:17:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:17:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:17:36,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:17:36,675 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:17:36,675 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:17:36,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:17:36 BoogieIcfgContainer [2020-08-21 18:17:36,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:17:36,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:17:36,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:17:36,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:17:36,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:17:36" (1/3) ... [2020-08-21 18:17:36,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e77464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:17:36, skipping insertion in model container [2020-08-21 18:17:36,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:36" (2/3) ... [2020-08-21 18:17:36,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e77464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:17:36, skipping insertion in model container [2020-08-21 18:17:36,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:17:36" (3/3) ... [2020-08-21 18:17:36,687 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-21 18:17:36,698 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:17:36,705 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:17:36,719 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:17:36,743 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:17:36,744 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:17:36,744 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:17:36,744 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:17:36,744 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:17:36,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:17:36,745 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:17:36,745 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:17:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-21 18:17:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 18:17:36,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:36,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:36,770 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-08-21 18:17:36,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:36,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145990447] [2020-08-21 18:17:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:37,350 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-08-21 18:17:37,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:37,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145990447] [2020-08-21 18:17:37,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:17:37,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:17:37,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250017059] [2020-08-21 18:17:37,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:17:37,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:17:37,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:17:37,452 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-21 18:17:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:39,849 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-21 18:17:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:17:39,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 18:17:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:39,863 INFO L225 Difference]: With dead ends: 49 [2020-08-21 18:17:39,864 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 18:17:39,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:17:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 18:17:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-08-21 18:17:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 18:17:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-08-21 18:17:39,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-08-21 18:17:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:39,915 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-08-21 18:17:39,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:17:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-08-21 18:17:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 18:17:39,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:39,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:39,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:17:39,917 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:39,918 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-08-21 18:17:39,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:39,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89647888] [2020-08-21 18:17:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:40,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:40,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89647888] [2020-08-21 18:17:40,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:40,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:17:40,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414944314] [2020-08-21 18:17:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:17:40,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:17:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:17:40,593 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 13 states. [2020-08-21 18:17:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:43,134 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-08-21 18:17:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:17:43,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-21 18:17:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:43,136 INFO L225 Difference]: With dead ends: 48 [2020-08-21 18:17:43,136 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 18:17:43,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:17:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 18:17:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-08-21 18:17:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 18:17:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-08-21 18:17:43,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-08-21 18:17:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:43,152 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-08-21 18:17:43,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:17:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-08-21 18:17:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:17:43,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:43,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:43,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:17:43,158 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:43,159 INFO L82 PathProgramCache]: Analyzing trace with hash 117019209, now seen corresponding path program 2 times [2020-08-21 18:17:43,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:43,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037490036] [2020-08-21 18:17:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:43,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:43,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037490036] [2020-08-21 18:17:43,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:43,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:17:43,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036170918] [2020-08-21 18:17:43,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:17:43,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:17:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:17:43,321 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-08-21 18:17:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:43,423 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-08-21 18:17:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:17:43,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 18:17:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:43,426 INFO L225 Difference]: With dead ends: 35 [2020-08-21 18:17:43,426 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 18:17:43,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:17:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 18:17:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-21 18:17:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 18:17:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-21 18:17:43,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-08-21 18:17:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:43,434 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-21 18:17:43,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:17:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-21 18:17:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:17:43,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:43,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:43,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:17:43,436 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash -367783497, now seen corresponding path program 1 times [2020-08-21 18:17:43,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:43,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820543489] [2020-08-21 18:17:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:43,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:43,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820543489] [2020-08-21 18:17:43,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:43,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:17:43,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194112481] [2020-08-21 18:17:43,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:17:43,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:17:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:17:43,635 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-21 18:17:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:45,819 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-21 18:17:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:17:45,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 18:17:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:45,821 INFO L225 Difference]: With dead ends: 34 [2020-08-21 18:17:45,821 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 18:17:45,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:17:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 18:17:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-21 18:17:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 18:17:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 18:17:45,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-08-21 18:17:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:45,835 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 18:17:45,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:17:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 18:17:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:17:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:45,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:45,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:17:45,837 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1925752910, now seen corresponding path program 1 times [2020-08-21 18:17:45,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:45,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466412718] [2020-08-21 18:17:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:45,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:45,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466412718] [2020-08-21 18:17:45,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:45,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:17:45,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628896206] [2020-08-21 18:17:45,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:17:45,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:17:45,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:17:45,981 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-08-21 18:17:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:46,074 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-21 18:17:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:17:46,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 18:17:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:46,076 INFO L225 Difference]: With dead ends: 35 [2020-08-21 18:17:46,076 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 18:17:46,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:17:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 18:17:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-21 18:17:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 18:17:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-08-21 18:17:46,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-08-21 18:17:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:46,083 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-08-21 18:17:46,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:17:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-08-21 18:17:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:17:46,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:46,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:46,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:17:46,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-08-21 18:17:46,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:46,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448060544] [2020-08-21 18:17:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:46,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:46,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448060544] [2020-08-21 18:17:46,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:46,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:17:46,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371944816] [2020-08-21 18:17:46,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:17:46,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:17:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:17:46,858 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 15 states. [2020-08-21 18:17:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:49,573 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-21 18:17:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:17:49,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-08-21 18:17:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:49,575 INFO L225 Difference]: With dead ends: 33 [2020-08-21 18:17:49,575 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 18:17:49,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:17:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 18:17:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 18:17:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 18:17:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 18:17:49,585 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-08-21 18:17:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:49,585 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 18:17:49,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:17:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 18:17:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:17:49,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:49,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:49,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:17:49,595 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 2 times [2020-08-21 18:17:49,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:49,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548894196] [2020-08-21 18:17:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:49,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:49,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548894196] [2020-08-21 18:17:49,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:49,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:17:49,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681168309] [2020-08-21 18:17:49,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:17:49,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:49,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:17:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:17:49,736 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-08-21 18:17:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:49,873 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-21 18:17:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:17:49,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-21 18:17:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:49,875 INFO L225 Difference]: With dead ends: 40 [2020-08-21 18:17:49,875 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 18:17:49,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:17:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 18:17:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-21 18:17:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 18:17:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-21 18:17:49,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-08-21 18:17:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:49,882 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-21 18:17:49,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:17:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-21 18:17:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:17:49,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:49,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:49,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:17:49,884 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash 937388738, now seen corresponding path program 1 times [2020-08-21 18:17:49,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:49,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972278485] [2020-08-21 18:17:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:54,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:54,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972278485] [2020-08-21 18:17:54,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:54,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:17:54,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691996907] [2020-08-21 18:17:54,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:17:54,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:17:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-21 18:17:54,177 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-21 18:18:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:18:00,650 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-08-21 18:18:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:18:00,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-21 18:18:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:18:00,652 INFO L225 Difference]: With dead ends: 39 [2020-08-21 18:18:00,652 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 18:18:00,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2020-08-21 18:18:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 18:18:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 18:18:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 18:18:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-21 18:18:00,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-08-21 18:18:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:18:00,665 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-21 18:18:00,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:18:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-21 18:18:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:18:00,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:18:00,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:18:00,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:18:00,667 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:18:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:18:00,667 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-08-21 18:18:00,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:18:00,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328728764] [2020-08-21 18:18:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:18:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:18:00,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:18:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:18:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 18:18:00,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328728764] [2020-08-21 18:18:00,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:18:00,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:18:00,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025941043] [2020-08-21 18:18:00,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:18:00,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:18:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:18:00,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:18:00,863 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-21 18:18:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:18:00,979 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-21 18:18:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:18:00,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 18:18:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:18:00,980 INFO L225 Difference]: With dead ends: 28 [2020-08-21 18:18:00,980 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:18:00,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:18:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:18:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:18:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:18:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:18:00,982 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 18:18:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:18:00,983 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:18:00,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:18:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:18:00,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:18:00,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:18:00,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:18:01,101 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:18:01,101 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-21 18:18:01,101 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:18:01,101 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:18:01,101 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-21 18:18:01,102 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-21 18:18:01,102 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-08-21 18:18:01,103 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-08-21 18:18:01,103 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-08-21 18:18:01,103 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-08-21 18:18:01,103 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-08-21 18:18:01,103 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-21 18:18:01,103 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse1 (div main_~l~0 4294967296)) (.cse0 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296))) (let ((.cse3 (+ (* 4294967296 .cse0) main_~l~0)) (.cse2 (* 4294967296 .cse1))) (and (< .cse0 (+ .cse1 1)) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2) .cse3) (< .cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2 1))))) (not (<= 20000001 ~SIZE~0))) [2020-08-21 18:18:01,104 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-08-21 18:18:01,104 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-08-21 18:18:01,104 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-21 18:18:01,104 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 18:18:01,104 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 18:18:01,104 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 18:18:01,105 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 18:18:01,105 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 18:18:01,105 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 18:18:01,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:18:01 BoogieIcfgContainer [2020-08-21 18:18:01,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:18:01,127 INFO L168 Benchmark]: Toolchain (without parser) took 25115.99 ms. Allocated memory was 142.1 MB in the beginning and 258.5 MB in the end (delta: 116.4 MB). Free memory was 105.3 MB in the beginning and 174.0 MB in the end (delta: -68.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:18:01,128 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:18:01,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.09 ms. Allocated memory is still 142.1 MB. Free memory was 105.1 MB in the beginning and 95.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:18:01,130 INFO L168 Benchmark]: Boogie Preprocessor took 106.02 ms. Allocated memory was 142.1 MB in the beginning and 205.0 MB in the end (delta: 62.9 MB). Free memory was 95.3 MB in the beginning and 182.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:18:01,131 INFO L168 Benchmark]: RCFGBuilder took 305.58 ms. Allocated memory is still 205.0 MB. Free memory was 182.9 MB in the beginning and 169.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:18:01,132 INFO L168 Benchmark]: TraceAbstraction took 24444.66 ms. Allocated memory was 205.0 MB in the beginning and 258.5 MB in the end (delta: 53.5 MB). Free memory was 168.7 MB in the beginning and 174.0 MB in the end (delta: -5.3 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:18:01,136 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.09 ms. Allocated memory is still 142.1 MB. Free memory was 105.1 MB in the beginning and 95.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.02 ms. Allocated memory was 142.1 MB in the beginning and 205.0 MB in the end (delta: 62.9 MB). Free memory was 95.3 MB in the beginning and 182.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.58 ms. Allocated memory is still 205.0 MB. Free memory was 182.9 MB in the beginning and 169.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24444.66 ms. Allocated memory was 205.0 MB in the beginning and 258.5 MB in the end (delta: 53.5 MB). Free memory was 168.7 MB in the beginning and 174.0 MB in the end (delta: -5.3 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || (i + j + k + v4 <= l && l <= i + j + k + v4)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.2s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 270 SDslu, 225 SDs, 0 SdLazy, 611 SolverSat, 87 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 29 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 25 NumberOfFragments, 105 HoareAnnotationTreeSize, 17 FomulaSimplifications, 611 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 92 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 35421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 33/60 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...