/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:28:53,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:53,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:53,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:53,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:53,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:53,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:53,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:53,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:53,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:53,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:53,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:53,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:53,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:53,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:53,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:53,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:53,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:53,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:53,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:53,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:53,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:53,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:53,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:53,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:53,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:53,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:53,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:53,929 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 10:28:53,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:53,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:53,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:53,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:53,986 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:53,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:53,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:53,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:53,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:53,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:53,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:53,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:53,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:53,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:53,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:53,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:53,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:53,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:53,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:53,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:53,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:53,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:53,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:53,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:53,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:53,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:53,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:53,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:53,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:53,993 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 -> false [2020-09-21 10:28:54,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:54,513 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:54,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:54,518 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:54,518 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:54,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-21 10:28:54,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d5ef052b/64b94e07588544bc8ff67074f76f7f8e/FLAG336564f14 [2020-09-21 10:28:55,148 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:55,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-21 10:28:55,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d5ef052b/64b94e07588544bc8ff67074f76f7f8e/FLAG336564f14 [2020-09-21 10:28:55,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d5ef052b/64b94e07588544bc8ff67074f76f7f8e [2020-09-21 10:28:55,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:55,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:55,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:55,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:55,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:55,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3155a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55, skipping insertion in model container [2020-09-21 10:28:55,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:55,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:55,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:55,772 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:55,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:55,811 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:55,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55 WrapperNode [2020-09-21 10:28:55,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:55,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:55,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:55,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:55,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (1/1) ... [2020-09-21 10:28:55,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:55,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:55,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:55,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:55,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (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 10:28:56,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:56,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:56,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:56,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:56,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:56,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:28:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:56,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:56,234 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:28:56,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:56 BoogieIcfgContainer [2020-09-21 10:28:56,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:56,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:56,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:56,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:56,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:55" (1/3) ... [2020-09-21 10:28:56,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5090caf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:56, skipping insertion in model container [2020-09-21 10:28:56,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:55" (2/3) ... [2020-09-21 10:28:56,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5090caf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:56, skipping insertion in model container [2020-09-21 10:28:56,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:56" (3/3) ... [2020-09-21 10:28:56,252 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-21 10:28:56,266 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:56,276 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:56,302 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:56,343 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:56,343 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:56,343 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:56,344 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:56,344 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:56,344 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:56,344 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:56,345 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 10:28:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:28:56,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:56,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:56,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-09-21 10:28:56,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:56,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243077283] [2020-09-21 10:28:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,649 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 10:28:56,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243077283] [2020-09-21 10:28:56,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:56,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 10:28:56,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177715512] [2020-09-21 10:28:56,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 10:28:56,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 10:28:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:28:56,700 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-21 10:28:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:56,730 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-09-21 10:28:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 10:28:56,731 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 10:28:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:56,742 INFO L225 Difference]: With dead ends: 30 [2020-09-21 10:28:56,743 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 10:28:56,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:28:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 10:28:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 10:28:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 10:28:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 10:28:56,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-09-21 10:28:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:56,793 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 10:28:56,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 10:28:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 10:28:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:28:56,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:56,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:56,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:56,795 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-09-21 10:28:56,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:56,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110032019] [2020-09-21 10:28:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,911 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 10:28:56,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110032019] [2020-09-21 10:28:56,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:56,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:56,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956227] [2020-09-21 10:28:56,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:56,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:56,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:56,923 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-09-21 10:28:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:56,972 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-09-21 10:28:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:56,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-21 10:28:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:56,974 INFO L225 Difference]: With dead ends: 21 [2020-09-21 10:28:56,975 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 10:28:56,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 10:28:56,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 10:28:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 10:28:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 10:28:56,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-09-21 10:28:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:56,982 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 10:28:56,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 10:28:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:28:56,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:56,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:56,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:56,984 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-09-21 10:28:56,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:56,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121970104] [2020-09-21 10:28:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,261 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 10:28:57,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121970104] [2020-09-21 10:28:57,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:57,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:57,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560396288] [2020-09-21 10:28:57,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:57,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:57,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:57,265 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-09-21 10:28:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:57,390 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-09-21 10:28:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:57,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-21 10:28:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:57,394 INFO L225 Difference]: With dead ends: 28 [2020-09-21 10:28:57,395 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 10:28:57,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 10:28:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-21 10:28:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 10:28:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-09-21 10:28:57,403 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-09-21 10:28:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:57,404 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-09-21 10:28:57,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:57,404 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-09-21 10:28:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:28:57,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:57,406 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-09-21 10:28:57,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642345623] [2020-09-21 10:28:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:28:57,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642345623] [2020-09-21 10:28:57,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:57,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:57,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386511210] [2020-09-21 10:28:57,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:57,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:57,441 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-09-21 10:28:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:57,458 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-09-21 10:28:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:57,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:28:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:57,460 INFO L225 Difference]: With dead ends: 28 [2020-09-21 10:28:57,460 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 10:28:57,461 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 10:28:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 10:28:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 10:28:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 10:28:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-09-21 10:28:57,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-09-21 10:28:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:57,467 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-09-21 10:28:57,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-09-21 10:28:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:28:57,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:28:57,469 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,470 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-09-21 10:28:57,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714949864] [2020-09-21 10:28:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:57,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714949864] [2020-09-21 10:28:57,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:57,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 10:28:57,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384476491] [2020-09-21 10:28:57,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:28:57,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:28:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:28:57,544 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-09-21 10:28:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:57,589 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-09-21 10:28:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:28:57,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 10:28:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:57,591 INFO L225 Difference]: With dead ends: 27 [2020-09-21 10:28:57,591 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 10:28:57,592 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 10:28:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 10:28:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-21 10:28:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:28:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 10:28:57,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-09-21 10:28:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:57,599 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 10:28:57,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:28:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 10:28:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:28:57,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:28:57,601 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-09-21 10:28:57,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384523231] [2020-09-21 10:28:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:28:57,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384523231] [2020-09-21 10:28:57,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:57,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:57,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144022016] [2020-09-21 10:28:57,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:57,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:57,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:57,837 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-09-21 10:28:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,014 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-09-21 10:28:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:58,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-09-21 10:28:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,016 INFO L225 Difference]: With dead ends: 27 [2020-09-21 10:28:58,016 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 10:28:58,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:28:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 10:28:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 10:28:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:28:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 10:28:58,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-09-21 10:28:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,023 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 10:28:58,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 10:28:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:28:58,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:28:58,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-09-21 10:28:58,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131148766] [2020-09-21 10:28:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131148766] [2020-09-21 10:28:58,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:28:58,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674231752] [2020-09-21 10:28:58,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:58,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:58,072 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-09-21 10:28:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,105 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 10:28:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:58,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 10:28:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,106 INFO L225 Difference]: With dead ends: 33 [2020-09-21 10:28:58,107 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 10:28:58,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 10:28:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-09-21 10:28:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:28:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 10:28:58,113 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-09-21 10:28:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,114 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 10:28:58,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 10:28:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:28:58,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,115 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:28:58,116 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-09-21 10:28:58,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334144993] [2020-09-21 10:28:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334144993] [2020-09-21 10:28:58,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:28:58,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590423524] [2020-09-21 10:28:58,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:28:58,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:28:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:58,190 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-09-21 10:28:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,228 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-21 10:28:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:58,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 10:28:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,230 INFO L225 Difference]: With dead ends: 36 [2020-09-21 10:28:58,230 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 10:28:58,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 10:28:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-21 10:28:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 10:28:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-21 10:28:58,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-09-21 10:28:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,237 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-21 10:28:58,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:28:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-21 10:28:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:28:58,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:28:58,239 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-09-21 10:28:58,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306153085] [2020-09-21 10:28:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306153085] [2020-09-21 10:28:58,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:58,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356792132] [2020-09-21 10:28:58,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:58,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:58,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:58,309 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-21 10:28:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,352 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-21 10:28:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:58,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 10:28:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,353 INFO L225 Difference]: With dead ends: 39 [2020-09-21 10:28:58,353 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 10:28:58,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 10:28:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-21 10:28:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:28:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-21 10:28:58,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-09-21 10:28:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,360 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-21 10:28:58,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-21 10:28:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:28:58,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,361 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:28:58,362 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-09-21 10:28:58,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192972667] [2020-09-21 10:28:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192972667] [2020-09-21 10:28:58,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:28:58,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305507951] [2020-09-21 10:28:58,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:28:58,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:28:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:28:58,438 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-09-21 10:28:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,490 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-21 10:28:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:28:58,490 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-21 10:28:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,491 INFO L225 Difference]: With dead ends: 42 [2020-09-21 10:28:58,492 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 10:28:58,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:28:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 10:28:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 10:28:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 10:28:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-09-21 10:28:58,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-09-21 10:28:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,499 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-09-21 10:28:58,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:28:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-09-21 10:28:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:28:58,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,500 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:28:58,501 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-09-21 10:28:58,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460353769] [2020-09-21 10:28:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460353769] [2020-09-21 10:28:58,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:58,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236582448] [2020-09-21 10:28:58,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:58,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:58,588 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-09-21 10:28:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,648 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-21 10:28:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:58,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-21 10:28:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,650 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:28:58,650 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:28:58,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:28:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 10:28:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:28:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 10:28:58,656 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-09-21 10:28:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,657 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 10:28:58,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 10:28:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:28:58,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,658 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:28:58,659 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-09-21 10:28:58,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251527680] [2020-09-21 10:28:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251527680] [2020-09-21 10:28:58,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875013984] [2020-09-21 10:28:58,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:58,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:58,754 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-09-21 10:28:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,811 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-09-21 10:28:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:28:58,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-09-21 10:28:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,813 INFO L225 Difference]: With dead ends: 48 [2020-09-21 10:28:58,813 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:28:58,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:28:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 10:28:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:28:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-21 10:28:58,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-09-21 10:28:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,820 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-21 10:28:58,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-21 10:28:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:28:58,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,821 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:28:58,821 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-09-21 10:28:58,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230521003] [2020-09-21 10:28:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230521003] [2020-09-21 10:28:58,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:28:58,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574610146] [2020-09-21 10:28:58,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:28:58,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:28:58,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:58,935 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-09-21 10:28:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,999 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-09-21 10:28:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:28:59,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-09-21 10:28:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:59,001 INFO L225 Difference]: With dead ends: 51 [2020-09-21 10:28:59,001 INFO L226 Difference]: Without dead ends: 43 [2020-09-21 10:28:59,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-21 10:28:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-21 10:28:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:28:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-21 10:28:59,008 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-09-21 10:28:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:59,008 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-21 10:28:59,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:28:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-21 10:28:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 10:28:59,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:59,010 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:59,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:28:59,010 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-09-21 10:28:59,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:59,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821309661] [2020-09-21 10:28:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:28:59,034 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:28:59,035 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:28:59,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:28:59,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:59 BoogieIcfgContainer [2020-09-21 10:28:59,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:59,069 INFO L168 Benchmark]: Toolchain (without parser) took 3553.86 ms. Allocated memory was 149.4 MB in the beginning and 240.6 MB in the end (delta: 91.2 MB). Free memory was 104.4 MB in the beginning and 155.9 MB in the end (delta: -51.5 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,070 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 149.4 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.73 ms. Allocated memory is still 149.4 MB. Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,072 INFO L168 Benchmark]: Boogie Preprocessor took 129.43 ms. Allocated memory was 149.4 MB in the beginning and 205.0 MB in the end (delta: 55.6 MB). Free memory was 94.4 MB in the beginning and 184.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,073 INFO L168 Benchmark]: RCFGBuilder took 297.63 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 172.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,073 INFO L168 Benchmark]: TraceAbstraction took 2823.14 ms. Allocated memory was 205.0 MB in the beginning and 240.6 MB in the end (delta: 35.7 MB). Free memory was 171.9 MB in the beginning and 155.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,077 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 149.4 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.73 ms. Allocated memory is still 149.4 MB. Free memory was 103.7 MB in the beginning and 94.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.43 ms. Allocated memory was 149.4 MB in the beginning and 205.0 MB in the end (delta: 55.6 MB). Free memory was 94.4 MB in the beginning and 184.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.63 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 172.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2823.14 ms. Allocated memory was 205.0 MB in the beginning and 240.6 MB in the end (delta: 35.7 MB). Free memory was 171.9 MB in the beginning and 155.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 59 SDslu, 484 SDs, 0 SdLazy, 391 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, 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, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 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 incorrect! Received shutdown request...