/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --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-eb0fd7c [2020-09-21 11:32:52,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:52,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:52,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:52,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:52,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:52,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:52,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:52,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:52,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:52,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:52,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:52,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:52,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:52,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:52,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:52,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:52,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:52,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:52,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:52,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:52,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:52,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:52,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:52,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:52,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:52,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:52,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:52,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:52,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:52,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:52,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:52,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:52,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:52,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:52,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:52,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:52,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:52,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:52,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:52,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:52,577 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 [2020-09-21 11:32:52,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:52,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:52,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:52,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:52,614 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:52,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:52,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:52,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:52,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:52,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:52,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:52,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:52,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:52,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:52,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:52,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:52,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:52,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:52,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:52,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:52,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:52,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:52,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:52,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:52,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:52,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:52,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:52,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:52,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:52,619 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:53,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:53,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:53,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:53,142 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:53,144 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:53,145 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-09-21 11:32:53,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81f2bec9a/a34ccf9de8fe42c487e7550e1b0f2ac8/FLAGd9be1e01f [2020-09-21 11:32:53,801 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:53,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-09-21 11:32:53,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81f2bec9a/a34ccf9de8fe42c487e7550e1b0f2ac8/FLAGd9be1e01f [2020-09-21 11:32:54,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81f2bec9a/a34ccf9de8fe42c487e7550e1b0f2ac8 [2020-09-21 11:32:54,136 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:54,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:54,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:54,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:54,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:54,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54, skipping insertion in model container [2020-09-21 11:32:54,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:54,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:54,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:54,413 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:54,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:54,459 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:54,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54 WrapperNode [2020-09-21 11:32:54,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:54,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:54,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:54,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:54,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (1/1) ... [2020-09-21 11:32:54,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:54,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:54,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:54,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:54,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (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 [2020-09-21 11:32:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:32:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:54,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:32:54,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:32:54,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:54,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:32:54,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:54,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:54,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:54,944 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:54,945 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:32:54,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:54 BoogieIcfgContainer [2020-09-21 11:32:54,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:54,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:54,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:54,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:54,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:54" (1/3) ... [2020-09-21 11:32:54,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be2dd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:54, skipping insertion in model container [2020-09-21 11:32:54,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:54" (2/3) ... [2020-09-21 11:32:54,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be2dd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:54, skipping insertion in model container [2020-09-21 11:32:54,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:54" (3/3) ... [2020-09-21 11:32:54,959 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-09-21 11:32:54,971 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:54,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:55,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:55,026 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:55,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:55,027 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:55,027 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:55,027 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:55,027 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:55,027 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:55,027 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-21 11:32:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:32:55,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:55,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:55,057 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:55,064 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-09-21 11:32:55,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:55,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410560618] [2020-09-21 11:32:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,331 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:32:55,331 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,332 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,332 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:32:55,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-21 11:32:55,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:55,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:55,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:55,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:55,629 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:55,630 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:55,631 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:55,631 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:55,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:55,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:55,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:32:55,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:55,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:55,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:32:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:55,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410560618] [2020-09-21 11:32:55,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:55,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:32:55,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878245180] [2020-09-21 11:32:55,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:55,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:55,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:55,733 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-09-21 11:32:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:56,044 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-09-21 11:32:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:56,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-09-21 11:32:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:56,060 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:32:56,060 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:32:56,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:32:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-09-21 11:32:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:32:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-09-21 11:32:56,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-09-21 11:32:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:56,118 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-09-21 11:32:56,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-09-21 11:32:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:32:56,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:56,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:56,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:56,120 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-09-21 11:32:56,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:56,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240185904] [2020-09-21 11:32:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,305 FATAL L256 erpolLogProxyWrapper]: Difference in size: 4 [2020-09-21 11:32:56,305 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -6 [2020-09-21 11:32:56,306 FATAL L256 erpolLogProxyWrapper]: Difference in width: 6 [2020-09-21 11:32:56,306 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:32:56,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-21 11:32:56,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:56,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:56,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:32:56,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:56,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:56,639 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:56,639 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:56,640 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:56,640 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:56,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:56,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:56,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:56,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:56,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:56,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240185904] [2020-09-21 11:32:56,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:56,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:56,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917906785] [2020-09-21 11:32:56,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:56,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:56,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:56,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:56,653 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 8 states. [2020-09-21 11:32:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:58,992 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-09-21 11:32:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:58,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-09-21 11:32:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:58,994 INFO L225 Difference]: With dead ends: 37 [2020-09-21 11:32:58,994 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:32:58,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:32:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-09-21 11:32:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:32:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-09-21 11:32:59,003 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-09-21 11:32:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:59,003 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-09-21 11:32:59,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-09-21 11:32:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:32:59,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:59,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:59,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:59,005 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:59,006 INFO L82 PathProgramCache]: Analyzing trace with hash 117019209, now seen corresponding path program 2 times [2020-09-21 11:32:59,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:59,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816574473] [2020-09-21 11:32:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:59,056 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:59,056 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:59,057 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:59,057 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:59,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:32:59,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:32:59,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:32:59,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:03,326 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 40 DAG size of output: 16 [2020-09-21 11:33:03,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:03,338 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:03,338 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:03,338 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:03,340 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:03,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:03,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:03,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:03,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:03,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:03,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:03,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:03,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:03,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816574473] [2020-09-21 11:33:03,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:03,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:33:03,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726923832] [2020-09-21 11:33:03,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:33:03,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:33:03,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:33:03,348 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-09-21 11:33:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:05,559 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-09-21 11:33:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:33:05,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-21 11:33:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:05,561 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:33:05,561 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:33:05,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:33:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:33:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-21 11:33:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:33:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-09-21 11:33:05,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-09-21 11:33:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:05,568 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-09-21 11:33:05,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:33:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-09-21 11:33:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:33:05,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:05,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:05,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:33:05,570 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash -367783497, now seen corresponding path program 1 times [2020-09-21 11:33:05,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:05,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777767911] [2020-09-21 11:33:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:05,622 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:05,623 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:05,623 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:05,623 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:05,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:33:05,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:33:05,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:05,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:33:05,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:33:05,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:33:05,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:05,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:05,752 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:05,752 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:05,752 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:05,753 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:05,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:05,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:05,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:05,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:05,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:05,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777767911] [2020-09-21 11:33:05,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:05,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:33:05,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249129647] [2020-09-21 11:33:05,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:33:05,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:05,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:33:05,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:33:05,762 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-09-21 11:33:08,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:08,006 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-09-21 11:33:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:33:08,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 11:33:08,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:08,008 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:33:08,008 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:33:08,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:33:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:33:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-21 11:33:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:33:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-09-21 11:33:08,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-09-21 11:33:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:08,018 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-09-21 11:33:08,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:33:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-09-21 11:33:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:33:08,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:08,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:08,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:33:08,021 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:08,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:08,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1925752910, now seen corresponding path program 1 times [2020-09-21 11:33:08,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:08,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547936821] [2020-09-21 11:33:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:08,092 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:08,092 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:08,093 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:08,093 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:08,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:33:08,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:08,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 11:33:08,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:08,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:33:08,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:33:08,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:33:08,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:10,295 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 35 DAG size of output: 13 [2020-09-21 11:33:10,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:10,311 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:10,311 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:10,311 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:10,312 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:10,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:10,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:10,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:33:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:10,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547936821] [2020-09-21 11:33:10,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:10,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:33:10,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926477822] [2020-09-21 11:33:10,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:33:10,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:33:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:33:10,325 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-09-21 11:33:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:10,461 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-09-21 11:33:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:33:10,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 11:33:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:10,462 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:33:10,462 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:33:10,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:33:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:33:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-21 11:33:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:33:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-09-21 11:33:10,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-09-21 11:33:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:10,470 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-09-21 11:33:10,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:33:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-09-21 11:33:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:33:10,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:10,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:10,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:33:10,472 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:10,472 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-09-21 11:33:10,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:10,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061580655] [2020-09-21 11:33:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:10,576 FATAL L256 erpolLogProxyWrapper]: Difference in size: 4 [2020-09-21 11:33:10,576 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -6 [2020-09-21 11:33:10,577 FATAL L256 erpolLogProxyWrapper]: Difference in width: 6 [2020-09-21 11:33:10,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:10,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:33:10,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-21 11:33:10,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:33:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:33:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:33:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:10,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:10,744 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:10,744 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:10,745 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:10,745 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:10,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:10,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:10,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:10,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:10,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 11:33:10,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061580655] [2020-09-21 11:33:10,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:10,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:33:10,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927650782] [2020-09-21 11:33:10,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:33:10,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:33:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:33:10,753 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2020-09-21 11:33:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:12,982 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-09-21 11:33:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:33:12,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-21 11:33:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:12,984 INFO L225 Difference]: With dead ends: 24 [2020-09-21 11:33:12,984 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:33:12,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:33:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:33:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:33:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:33:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:33:12,986 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-09-21 11:33:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:12,986 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:33:12,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:33:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:33:12,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:33:12,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:33:12,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:33:13,197 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:33:13,197 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-09-21 11:33:13,197 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:33:13,197 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:33:13,197 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:33:13,197 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-09-21 11:33:13,198 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-09-21 11:33:13,199 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-09-21 11:33:13,199 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-09-21 11:33:13,199 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) [2020-09-21 11:33:13,199 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (let ((.cse0 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296)) (.cse1 (div main_~l~0 4294967296))) (let ((.cse4 (* 4294967296 .cse1)) (.cse5 (* 4294967296 .cse0))) (let ((.cse3 (+ .cse5 main_~l~0)) (.cse2 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse4))) (or (and (<= .cse0 .cse1) (<= .cse2 .cse3) (< .cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse4 1))) (and (< .cse2 (+ .cse5 main_~l~0 1)) (<= .cse3 .cse2) (< 0 (+ .cse0 1)) (<= .cse1 0)))))) [2020-09-21 11:33:13,199 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-09-21 11:33:13,199 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-09-21 11:33:13,200 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-21 11:33:13,200 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 11:33:13,200 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:33:13,200 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 11:33:13,200 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 11:33:13,200 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:33:13,201 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 11:33:13,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:33:13 BoogieIcfgContainer [2020-09-21 11:33:13,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:33:13,223 INFO L168 Benchmark]: Toolchain (without parser) took 19084.97 ms. Allocated memory was 138.4 MB in the beginning and 248.0 MB in the end (delta: 109.6 MB). Free memory was 102.1 MB in the beginning and 144.2 MB in the end (delta: -42.1 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:13,224 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:33:13,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.82 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:13,225 INFO L168 Benchmark]: Boogie Preprocessor took 129.50 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 179.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:13,226 INFO L168 Benchmark]: RCFGBuilder took 358.67 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 165.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:13,227 INFO L168 Benchmark]: TraceAbstraction took 18270.13 ms. Allocated memory was 200.8 MB in the beginning and 248.0 MB in the end (delta: 47.2 MB). Free memory was 164.4 MB in the beginning and 144.2 MB in the end (delta: 20.2 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:13,231 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.82 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.50 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 179.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.67 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 165.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18270.13 ms. Allocated memory was 200.8 MB in the beginning and 248.0 MB in the end (delta: 47.2 MB). Free memory was 164.4 MB in the beginning and 144.2 MB in the end (delta: 20.2 MB). Peak memory consumption was 67.4 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: i + j + k + v4 <= l && l <= i + j + k + v4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.9s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 149 SDslu, 130 SDs, 0 SdLazy, 311 SolverSat, 45 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, 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, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 20 NumberOfFragments, 142 HoareAnnotationTreeSize, 14 FomulaSimplifications, 251 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 53 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 17334 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 12/21 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...