/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 enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:35:55,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:35:55,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:35:55,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:35:55,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:35:55,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:35:55,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:35:55,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:35:55,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:35:55,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:35:55,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:35:55,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:35:55,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:35:55,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:35:55,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:35:55,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:35:55,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:35:55,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:35:55,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:35:55,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:35:55,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:35:55,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:35:55,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:35:55,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:35:55,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:35:55,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:35:55,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:35:55,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:35:55,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:35:55,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:35:55,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:35:55,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:35:55,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:35:55,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:35:55,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:35:55,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:35:55,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:35:55,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:35:55,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:35:55,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:35:55,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:35:55,097 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 12:35:55,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:35:55,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:35:55,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:35:55,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:35:55,148 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:35:55,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:35:55,148 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:35:55,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:35:55,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:35:55,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:35:55,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:35:55,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:35:55,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:35:55,151 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:35:55,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:35:55,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:35:55,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:35:55,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:35:55,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:35:55,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:35:55,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:35:55,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:55,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:35:55,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:35:55,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:35:55,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:35:55,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:35:55,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:35:55,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:35:55,154 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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:35:55,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:35:55,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:35:55,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:35:55,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:35:55,663 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:35:55,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-09-21 12:35:55,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0b699b28/f0a85817f2294bba940b78813430813b/FLAGb0f598dbc [2020-09-21 12:35:56,357 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:35:56,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-09-21 12:35:56,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0b699b28/f0a85817f2294bba940b78813430813b/FLAGb0f598dbc [2020-09-21 12:35:56,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0b699b28/f0a85817f2294bba940b78813430813b [2020-09-21 12:35:56,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:35:56,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:35:56,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:56,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:35:56,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:35:56,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:56,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbfc66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56, skipping insertion in model container [2020-09-21 12:35:56,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:56,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:35:56,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:35:56,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:56,959 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:35:56,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:56,989 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:35:56,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56 WrapperNode [2020-09-21 12:35:56,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:56,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:35:56,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:35:56,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:35:57,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (1/1) ... [2020-09-21 12:35:57,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:35:57,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:35:57,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:35:57,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:35:57,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (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 12:35:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:35:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:35:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:35:57,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:35:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:35:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:35:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:35:57,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:35:57,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:35:57,381 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:35:57,382 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:35:57,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:57 BoogieIcfgContainer [2020-09-21 12:35:57,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:35:57,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:35:57,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:35:57,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:35:57,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:56" (1/3) ... [2020-09-21 12:35:57,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a716deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:57, skipping insertion in model container [2020-09-21 12:35:57,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:56" (2/3) ... [2020-09-21 12:35:57,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a716deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:57, skipping insertion in model container [2020-09-21 12:35:57,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:57" (3/3) ... [2020-09-21 12:35:57,395 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-09-21 12:35:57,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:35:57,413 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:35:57,431 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:35:57,458 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:35:57,458 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:35:57,458 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:35:57,458 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:35:57,458 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:35:57,458 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:35:57,459 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:35:57,459 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:35:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-21 12:35:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:35:57,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:57,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:57,484 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-09-21 12:35:57,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:57,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881673504] [2020-09-21 12:35:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:57,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:57,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 12:35:57,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:57,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-21 12:35:57,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:57,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:57,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:35:57,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:35:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:57,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:57,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:57,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:57,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:57,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:57,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:57,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:57,790 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 12:35:57,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881673504] [2020-09-21 12:35:57,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:57,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:35:57,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398534515] [2020-09-21 12:35:57,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:35:57,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:35:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:57,861 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-21 12:35:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:57,949 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-09-21 12:35:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:35:57,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 12:35:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:57,960 INFO L225 Difference]: With dead ends: 29 [2020-09-21 12:35:57,961 INFO L226 Difference]: Without dead ends: 12 [2020-09-21 12:35:57,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-09-21 12:35:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-09-21 12:35:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-09-21 12:35:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-09-21 12:35:58,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-09-21 12:35:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:58,005 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-09-21 12:35:58,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:35:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-09-21 12:35:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:35:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:58,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:58,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:35:58,008 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-09-21 12:35:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:58,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255152997] [2020-09-21 12:35:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:35:58,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:58,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-09-21 12:35:58,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:35:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:35:58,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:58,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:58,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:58,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:58,228 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 12:35:58,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255152997] [2020-09-21 12:35:58,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:58,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 12:35:58,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864148084] [2020-09-21 12:35:58,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:35:58,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:35:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:58,233 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-09-21 12:35:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:58,255 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-09-21 12:35:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:35:58,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-09-21 12:35:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:58,257 INFO L225 Difference]: With dead ends: 18 [2020-09-21 12:35:58,258 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 12:35:58,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 12:35:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 12:35:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 12:35:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-21 12:35:58,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-09-21 12:35:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:58,265 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-21 12:35:58,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:35:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-21 12:35:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 12:35:58,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:58,266 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:58,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:35:58,267 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-09-21 12:35:58,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:58,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85041449] [2020-09-21 12:35:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 12:35:58,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-09-21 12:35:58,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:35:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:35:58,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:58,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:58,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:58,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:58,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:58,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85041449] [2020-09-21 12:35:58,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:58,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:35:58,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023407869] [2020-09-21 12:35:58,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:58,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:58,723 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-09-21 12:35:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:58,750 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-09-21 12:35:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:35:58,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-21 12:35:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:58,751 INFO L225 Difference]: With dead ends: 19 [2020-09-21 12:35:58,751 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 12:35:58,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 12:35:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 12:35:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 12:35:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-09-21 12:35:58,757 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-09-21 12:35:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:58,758 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-09-21 12:35:58,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-09-21 12:35:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 12:35:58,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:58,759 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:58,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:35:58,760 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-09-21 12:35:58,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:58,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931084155] [2020-09-21 12:35:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:35:58,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:58,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-21 12:35:58,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:35:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:58,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:35:58,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:59,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:59,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:59,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:59,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:35:59,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:59,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:59,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:59,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:59,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:59,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 12:35:59,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931084155] [2020-09-21 12:35:59,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:59,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:35:59,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717995345] [2020-09-21 12:35:59,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:59,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:59,102 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-09-21 12:35:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:59,131 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-09-21 12:35:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:59,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-09-21 12:35:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:59,132 INFO L225 Difference]: With dead ends: 14 [2020-09-21 12:35:59,132 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:35:59,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:35:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:35:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:35:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:35:59,134 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-09-21 12:35:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:59,134 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:35:59,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:35:59,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:35:59,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:35:59,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:35:59,175 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:35:59,175 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:59,175 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:59,176 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:35:59,176 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:35:59,176 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:59,176 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-09-21 12:35:59,176 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-09-21 12:35:59,176 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-09-21 12:35:59,177 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (<= main_~x~0 (+ (* 4294967296 (div main_~x~0 4294967296)) 6)) [2020-09-21 12:35:59,177 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= main_~x~0 (+ (* 4294967296 (div main_~x~0 4294967296)) 6)) [2020-09-21 12:35:59,177 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 12:35:59,177 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 12:35:59,177 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 12:35:59,178 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 12:35:59,178 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 12:35:59,178 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 12:35:59,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:59 BoogieIcfgContainer [2020-09-21 12:35:59,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:59,209 INFO L168 Benchmark]: Toolchain (without parser) took 2530.56 ms. Allocated memory was 145.8 MB in the beginning and 234.4 MB in the end (delta: 88.6 MB). Free memory was 101.9 MB in the beginning and 189.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 642.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:35:59,210 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-21 12:35:59,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.73 ms. Allocated memory is still 145.8 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:59,212 INFO L168 Benchmark]: Boogie Preprocessor took 115.07 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 92.1 MB in the beginning and 181.8 MB in the end (delta: -89.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:59,213 INFO L168 Benchmark]: RCFGBuilder took 279.56 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 169.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:59,215 INFO L168 Benchmark]: TraceAbstraction took 1818.13 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 168.7 MB in the beginning and 189.9 MB in the end (delta: -21.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:59,219 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.73 ms. Allocated memory is still 145.8 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.07 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 92.1 MB in the beginning and 181.8 MB in the end (delta: -89.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.56 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 169.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1818.13 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 168.7 MB in the beginning and 189.9 MB in the end (delta: -21.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: x <= 4294967296 * (x / 4294967296) + 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 2 SDslu, 75 SDs, 0 SdLazy, 29 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 10 FomulaSimplifications, 60 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1166 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 6/10 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...