/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --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/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:31:10,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:31:10,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:31:10,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:31:10,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:31:10,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:31:10,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:31:10,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:31:10,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:31:10,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:31:10,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:31:10,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:31:10,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:31:10,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:31:10,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:31:10,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:31:10,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:31:10,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:31:10,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:31:10,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:31:10,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:31:10,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:31:10,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:31:10,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:31:10,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:31:10,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:31:10,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:31:10,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:31:10,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:31:10,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:31:10,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:31:10,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:31:10,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:31:10,309 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:31:10,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:31:10,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:31:10,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:31:10,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:31:10,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:31:10,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:31:10,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:31:10,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:31:10,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:31:10,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:31:10,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:31:10,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:31:10,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:31:10,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:31:10,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:31:10,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:31:10,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:31:10,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:31:10,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:31:10,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:31:10,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:31:10,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:31:10,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:31:10,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:31:10,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:31:10,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:31:10,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:31:10,652 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:31:10,653 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:31:10,654 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:31:10,655 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-08-21 21:31:10,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e01a4d32/fd8c3aad31fa497ab45d6d6e249ceeb8/FLAGeeba2c40a [2020-08-21 21:31:11,167 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:31:11,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-08-21 21:31:11,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e01a4d32/fd8c3aad31fa497ab45d6d6e249ceeb8/FLAGeeba2c40a [2020-08-21 21:31:11,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e01a4d32/fd8c3aad31fa497ab45d6d6e249ceeb8 [2020-08-21 21:31:11,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:31:11,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:31:11,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:31:11,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:31:11,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:31:11,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518dc62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11, skipping insertion in model container [2020-08-21 21:31:11,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:31:11,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:31:11,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:31:11,786 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:31:11,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:31:11,823 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:31:11,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11 WrapperNode [2020-08-21 21:31:11,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:31:11,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:31:11,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:31:11,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:31:11,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... [2020-08-21 21:31:11,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:31:11,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:31:11,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:31:11,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:31:11,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:31:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:31:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:31:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 21:31:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:31:12,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:31:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:31:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 21:31:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 21:31:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:31:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:31:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:31:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:31:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:31:12,268 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:31:12,268 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:31:12,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:31:12 BoogieIcfgContainer [2020-08-21 21:31:12,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:31:12,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:31:12,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:31:12,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:31:12,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:31:11" (1/3) ... [2020-08-21 21:31:12,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af46ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:31:12, skipping insertion in model container [2020-08-21 21:31:12,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:11" (2/3) ... [2020-08-21 21:31:12,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af46ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:31:12, skipping insertion in model container [2020-08-21 21:31:12,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:31:12" (3/3) ... [2020-08-21 21:31:12,280 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-08-21 21:31:12,292 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:31:12,300 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:31:12,317 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:31:12,358 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:31:12,358 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:31:12,359 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:31:12,359 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:31:12,359 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:31:12,359 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:31:12,359 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:31:12,360 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:31:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-21 21:31:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 21:31:12,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:12,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:12,396 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:12,403 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-08-21 21:31:12,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:12,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437481802] [2020-08-21 21:31:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:12,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:12,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437481802] [2020-08-21 21:31:12,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:31:12,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:31:12,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114365799] [2020-08-21 21:31:12,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:31:12,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:12,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:31:12,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:31:12,591 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-21 21:31:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:12,649 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-21 21:31:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:31:12,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-21 21:31:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:12,663 INFO L225 Difference]: With dead ends: 37 [2020-08-21 21:31:12,663 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 21:31:12,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:31:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 21:31:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 21:31:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 21:31:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-08-21 21:31:12,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-08-21 21:31:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:12,717 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-08-21 21:31:12,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:31:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-08-21 21:31:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 21:31:12,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:12,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:12,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:31:12,719 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-08-21 21:31:12,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:12,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526448156] [2020-08-21 21:31:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:13,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:13,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526448156] [2020-08-21 21:31:13,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:31:13,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:31:13,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574362075] [2020-08-21 21:31:13,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:31:13,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:13,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:31:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:31:13,135 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2020-08-21 21:31:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:17,509 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-08-21 21:31:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:31:17,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 21:31:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:17,513 INFO L225 Difference]: With dead ends: 26 [2020-08-21 21:31:17,513 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 21:31:17,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:31:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 21:31:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-08-21 21:31:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 21:31:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-08-21 21:31:17,537 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-08-21 21:31:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:17,537 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-08-21 21:31:17,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:31:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-08-21 21:31:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 21:31:17,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:17,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:17,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:31:17,542 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-08-21 21:31:17,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:17,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756057461] [2020-08-21 21:31:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:18,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756057461] [2020-08-21 21:31:18,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:18,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:31:18,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790798431] [2020-08-21 21:31:18,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:31:18,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:31:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:31:18,254 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 13 states. [2020-08-21 21:31:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:22,961 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-08-21 21:31:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:31:22,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-21 21:31:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:22,963 INFO L225 Difference]: With dead ends: 40 [2020-08-21 21:31:22,963 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 21:31:22,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:31:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 21:31:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-08-21 21:31:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 21:31:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-21 21:31:22,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-08-21 21:31:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:22,978 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-21 21:31:22,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:31:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-21 21:31:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:31:22,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:22,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:22,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:31:22,982 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash -162414684, now seen corresponding path program 2 times [2020-08-21 21:31:22,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:22,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590100363] [2020-08-21 21:31:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:23,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:23,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590100363] [2020-08-21 21:31:23,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:23,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:31:23,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663161789] [2020-08-21 21:31:23,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:31:23,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:31:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:31:23,374 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-08-21 21:31:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:23,710 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-08-21 21:31:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:31:23,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-08-21 21:31:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:23,712 INFO L225 Difference]: With dead ends: 38 [2020-08-21 21:31:23,712 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 21:31:23,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:31:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 21:31:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-08-21 21:31:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 21:31:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-21 21:31:23,719 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2020-08-21 21:31:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:23,720 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-21 21:31:23,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:31:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-21 21:31:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 21:31:23,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:23,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:23,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:31:23,722 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash -444322542, now seen corresponding path program 1 times [2020-08-21 21:31:23,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:23,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471409025] [2020-08-21 21:31:23,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:23,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:23,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471409025] [2020-08-21 21:31:23,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:23,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 21:31:23,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089294689] [2020-08-21 21:31:23,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:31:23,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:23,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:31:23,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:31:23,846 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-08-21 21:31:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:23,971 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-21 21:31:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:31:23,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 21:31:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:23,973 INFO L225 Difference]: With dead ends: 38 [2020-08-21 21:31:23,973 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 21:31:23,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:31:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 21:31:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-08-21 21:31:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 21:31:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-21 21:31:23,983 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-08-21 21:31:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:23,983 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-21 21:31:23,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:31:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-21 21:31:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:31:23,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:23,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:23,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:31:23,986 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash -450980439, now seen corresponding path program 1 times [2020-08-21 21:31:23,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:23,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974176734] [2020-08-21 21:31:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:24,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:24,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974176734] [2020-08-21 21:31:24,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:24,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:31:24,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611701486] [2020-08-21 21:31:24,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:31:24,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:24,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:31:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:31:24,305 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-08-21 21:31:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:28,684 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-08-21 21:31:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:31:28,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 21:31:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:28,687 INFO L225 Difference]: With dead ends: 37 [2020-08-21 21:31:28,687 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 21:31:28,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:31:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 21:31:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-21 21:31:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 21:31:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-21 21:31:28,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2020-08-21 21:31:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:28,695 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-21 21:31:28,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:31:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-21 21:31:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:31:28,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:28,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:28,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:31:28,697 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:28,698 INFO L82 PathProgramCache]: Analyzing trace with hash -514824137, now seen corresponding path program 1 times [2020-08-21 21:31:28,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:28,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964493878] [2020-08-21 21:31:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:28,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:28,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964493878] [2020-08-21 21:31:28,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:28,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 21:31:28,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077714788] [2020-08-21 21:31:28,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:31:28,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:28,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:31:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:31:28,813 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-21 21:31:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:28,924 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-08-21 21:31:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:31:28,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 21:31:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:28,926 INFO L225 Difference]: With dead ends: 38 [2020-08-21 21:31:28,926 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 21:31:28,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:31:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 21:31:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-21 21:31:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 21:31:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 21:31:28,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-08-21 21:31:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:28,937 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 21:31:28,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:31:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 21:31:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:31:28,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:28,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:28,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:31:28,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:28,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1260183225, now seen corresponding path program 1 times [2020-08-21 21:31:28,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:28,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841574524] [2020-08-21 21:31:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:29,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:29,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841574524] [2020-08-21 21:31:29,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:29,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 21:31:29,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136763485] [2020-08-21 21:31:29,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:31:29,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:31:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:31:29,709 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 15 states. [2020-08-21 21:31:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:30,609 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-21 21:31:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:31:30,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-08-21 21:31:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:30,611 INFO L225 Difference]: With dead ends: 37 [2020-08-21 21:31:30,611 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 21:31:30,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-08-21 21:31:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 21:31:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-21 21:31:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 21:31:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-21 21:31:30,617 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-08-21 21:31:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:30,618 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-21 21:31:30,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:31:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-21 21:31:30,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:31:30,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:30,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:30,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:31:30,620 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:30,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 2 times [2020-08-21 21:31:30,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:30,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883990376] [2020-08-21 21:31:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:30,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:30,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883990376] [2020-08-21 21:31:30,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:30,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:31:30,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204062317] [2020-08-21 21:31:30,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:31:30,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:30,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:31:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:31:30,788 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-21 21:31:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:35,080 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-21 21:31:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:31:35,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-21 21:31:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:35,081 INFO L225 Difference]: With dead ends: 41 [2020-08-21 21:31:35,081 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 21:31:35,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:31:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 21:31:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-21 21:31:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 21:31:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 21:31:35,088 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-08-21 21:31:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:35,088 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 21:31:35,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:31:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 21:31:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:31:35,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:35,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:35,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:31:35,090 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1961236154, now seen corresponding path program 1 times [2020-08-21 21:31:35,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:35,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47875583] [2020-08-21 21:31:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:35,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:35,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47875583] [2020-08-21 21:31:35,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:35,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:31:35,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435399033] [2020-08-21 21:31:35,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:31:35,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:31:35,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:31:35,209 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-08-21 21:31:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:35,331 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-08-21 21:31:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:31:35,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-21 21:31:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:35,333 INFO L225 Difference]: With dead ends: 44 [2020-08-21 21:31:35,333 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 21:31:35,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:31:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 21:31:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-08-21 21:31:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 21:31:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 21:31:35,339 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2020-08-21 21:31:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:35,340 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 21:31:35,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:31:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 21:31:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:31:35,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:35,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:35,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:31:35,341 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash -230662155, now seen corresponding path program 1 times [2020-08-21 21:31:35,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:35,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670038456] [2020-08-21 21:31:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:39,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:39,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670038456] [2020-08-21 21:31:39,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:31:39,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:31:39,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772931373] [2020-08-21 21:31:39,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:31:39,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:31:39,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-21 21:31:39,652 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-08-21 21:31:41,806 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 26 [2020-08-21 21:31:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:46,116 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-08-21 21:31:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:31:46,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-21 21:31:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:46,118 INFO L225 Difference]: With dead ends: 43 [2020-08-21 21:31:46,118 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 21:31:46,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=28, Invalid=61, Unknown=1, NotChecked=0, Total=90 [2020-08-21 21:31:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 21:31:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-21 21:31:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 21:31:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-21 21:31:46,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-08-21 21:31:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:46,125 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-21 21:31:46,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:31:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-21 21:31:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 21:31:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:46,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:46,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:31:46,126 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-08-21 21:31:46,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:46,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911331258] [2020-08-21 21:31:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:46,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 21:31:46,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911331258] [2020-08-21 21:31:46,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:31:46,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:31:46,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32332062] [2020-08-21 21:31:46,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:31:46,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:46,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:31:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:31:46,242 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-08-21 21:31:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:46,361 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-21 21:31:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:31:46,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 21:31:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:46,363 INFO L225 Difference]: With dead ends: 31 [2020-08-21 21:31:46,363 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:31:46,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:31:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:31:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:31:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:31:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:31:46,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 21:31:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:46,365 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:31:46,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:31:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:31:46,366 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:31:46,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:31:46,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:31:46,515 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:31:46,516 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-21 21:31:46,516 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:31:46,516 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:31:46,516 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-21 21:31:46,516 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-08-21 21:31:46,517 INFO L268 CegarLoopResult]: For program point L27(lines 27 30) no Hoare annotation was computed. [2020-08-21 21:31:46,518 INFO L268 CegarLoopResult]: For program point L25(lines 25 30) no Hoare annotation was computed. [2020-08-21 21:31:46,518 INFO L268 CegarLoopResult]: For program point L27-2(lines 21 30) no Hoare annotation was computed. [2020-08-21 21:31:46,518 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 35) no Hoare annotation was computed. [2020-08-21 21:31:46,518 INFO L268 CegarLoopResult]: For program point L23(lines 23 30) no Hoare annotation was computed. [2020-08-21 21:31:46,518 INFO L268 CegarLoopResult]: For program point L21(lines 21 30) no Hoare annotation was computed. [2020-08-21 21:31:46,518 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 32) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0))) (and (<= main_~l~0 .cse0) (<= .cse0 main_~l~0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-21 21:31:46,520 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 32) the Hoare annotation is: (or (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0 (* 4294967296 (div main_~l~0 4294967296)))) (.cse0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0) 4294967296)))) (and (<= (+ main_~l~0 .cse0) .cse1) (< .cse1 (+ main_~l~0 .cse0 1)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-21 21:31:46,520 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 35) no Hoare annotation was computed. [2020-08-21 21:31:46,520 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 35) the Hoare annotation is: true [2020-08-21 21:31:46,520 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-21 21:31:46,520 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 21:31:46,520 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 21:31:46,520 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 21:31:46,521 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 21:31:46,521 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 21:31:46,521 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 21:31:46,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:31:46 BoogieIcfgContainer [2020-08-21 21:31:46,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:31:46,542 INFO L168 Benchmark]: Toolchain (without parser) took 34968.88 ms. Allocated memory was 148.9 MB in the beginning and 263.2 MB in the end (delta: 114.3 MB). Free memory was 105.5 MB in the beginning and 163.8 MB in the end (delta: -58.3 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:46,543 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:31:46,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.68 ms. Allocated memory is still 148.9 MB. Free memory was 105.1 MB in the beginning and 95.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:46,545 INFO L168 Benchmark]: Boogie Preprocessor took 129.21 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.3 MB in the beginning and 184.1 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:46,545 INFO L168 Benchmark]: RCFGBuilder took 318.79 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 168.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:46,546 INFO L168 Benchmark]: TraceAbstraction took 34265.84 ms. Allocated memory was 205.0 MB in the beginning and 263.2 MB in the end (delta: 58.2 MB). Free memory was 168.3 MB in the beginning and 163.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:46,550 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.68 ms. Allocated memory is still 148.9 MB. Free memory was 105.1 MB in the beginning and 95.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.21 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.3 MB in the beginning and 184.1 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.79 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 168.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 34265.84 ms. Allocated memory was 205.0 MB in the beginning and 263.2 MB in the end (delta: 58.2 MB). Free memory was 168.3 MB in the beginning and 163.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 62.6 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: ((l <= i + j + k + v3 + v4 && i + j + k + v3 + v4 <= l) || !(SIZE <= 20000001)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.0s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 26.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 509 SDslu, 239 SDs, 0 SdLazy, 745 SolverSat, 129 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 21.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 24 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 98 HoareAnnotationTreeSize, 19 FomulaSimplifications, 530 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 248 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 52122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 42/80 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...