/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_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:28:54,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:54,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:54,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:54,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:54,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:54,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:55,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:55,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:55,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:55,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:55,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:55,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:55,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:55,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:55,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:55,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:55,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:55,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:55,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:55,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:55,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:55,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:55,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:55,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:55,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:55,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:55,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:55,069 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 10:28:55,114 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:55,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:55,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:55,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:55,117 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:55,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:55,117 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:55,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:55,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:55,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:55,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:55,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:55,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:55,120 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:55,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:55,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:55,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:55,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:55,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:55,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:55,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:55,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:55,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:55,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:55,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:55,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:55,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:55,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:55,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:55,123 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 10:28:55,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:55,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:55,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:55,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:55,621 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:55,622 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-21 10:28:55,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f0e34d0e/11af296f5ad4490db939cba35f56982a/FLAG71e94d2de [2020-09-21 10:28:56,243 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:56,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-21 10:28:56,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f0e34d0e/11af296f5ad4490db939cba35f56982a/FLAG71e94d2de [2020-09-21 10:28:56,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f0e34d0e/11af296f5ad4490db939cba35f56982a [2020-09-21 10:28:56,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:56,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:56,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:56,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:56,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:56,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba03fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56, skipping insertion in model container [2020-09-21 10:28:56,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:56,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:56,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:56,879 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:56,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:56,916 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:56,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56 WrapperNode [2020-09-21 10:28:56,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:56,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:56,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:56,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:56,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:56,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... [2020-09-21 10:28:57,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:57,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:57,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:57,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:57,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:57,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:28:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:57,304 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:57,305 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:28:57,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:57 BoogieIcfgContainer [2020-09-21 10:28:57,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:57,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:57,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:57,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:57,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:56" (1/3) ... [2020-09-21 10:28:57,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e02ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:57, skipping insertion in model container [2020-09-21 10:28:57,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:56" (2/3) ... [2020-09-21 10:28:57,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e02ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:57, skipping insertion in model container [2020-09-21 10:28:57,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:57" (3/3) ... [2020-09-21 10:28:57,348 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-21 10:28:57,381 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:57,391 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:57,431 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:57,456 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:57,456 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:57,456 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:57,456 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:57,457 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:57,457 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:57,457 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:57,457 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 10:28:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:28:57,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,485 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-09-21 10:28:57,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589998682] [2020-09-21 10:28:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,635 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 10:28:57,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589998682] [2020-09-21 10:28:57,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:57,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 10:28:57,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757947092] [2020-09-21 10:28:57,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 10:28:57,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 10:28:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:28:57,675 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-21 10:28:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:57,708 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-09-21 10:28:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 10:28:57,710 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 10:28:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:57,722 INFO L225 Difference]: With dead ends: 31 [2020-09-21 10:28:57,722 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 10:28:57,727 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 10:28:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 10:28:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 10:28:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 10:28:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-09-21 10:28:57,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-09-21 10:28:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:57,765 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-09-21 10:28:57,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 10:28:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-09-21 10:28:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:28:57,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:57,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-09-21 10:28:57,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666341871] [2020-09-21 10:28:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,867 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 10:28:57,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666341871] [2020-09-21 10:28:57,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:57,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:57,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740674896] [2020-09-21 10:28:57,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:57,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:57,871 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-09-21 10:28:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:57,928 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-09-21 10:28:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:57,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-21 10:28:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:57,930 INFO L225 Difference]: With dead ends: 23 [2020-09-21 10:28:57,930 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 10:28:57,931 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 10:28:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 10:28:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 10:28:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:28:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 10:28:57,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-09-21 10:28:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:57,938 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 10:28:57,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 10:28:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:28:57,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:57,940 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-09-21 10:28:57,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694704919] [2020-09-21 10:28:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,202 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 10:28:58,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694704919] [2020-09-21 10:28:58,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:58,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860024962] [2020-09-21 10:28:58,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:58,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:58,205 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-09-21 10:28:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,317 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-21 10:28:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:58,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-09-21 10:28:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,320 INFO L225 Difference]: With dead ends: 33 [2020-09-21 10:28:58,321 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 10:28:58,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 10:28:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-09-21 10:28:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 10:28:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-09-21 10:28:58,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-09-21 10:28:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,329 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-09-21 10:28:58,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-09-21 10:28:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:28:58,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:58,332 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,332 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-09-21 10:28:58,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213119965] [2020-09-21 10:28:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-21 10:28:58,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213119965] [2020-09-21 10:28:58,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:58,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:58,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392289444] [2020-09-21 10:28:58,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:58,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:58,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:58,366 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-09-21 10:28:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,386 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-09-21 10:28:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:58,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:28:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,387 INFO L225 Difference]: With dead ends: 32 [2020-09-21 10:28:58,388 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 10:28:58,388 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 10:28:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 10:28:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 10:28:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 10:28:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-09-21 10:28:58,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-09-21 10:28:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,394 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-09-21 10:28:58,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-09-21 10:28:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:28:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:28:58,396 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-09-21 10:28:58,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527220770] [2020-09-21 10:28:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:58,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527220770] [2020-09-21 10:28:58,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:28:58,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799197599] [2020-09-21 10:28:58,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:58,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:58,467 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-09-21 10:28:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,520 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 10:28:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:58,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-21 10:28:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,521 INFO L225 Difference]: With dead ends: 30 [2020-09-21 10:28:58,522 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:28:58,522 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 10:28:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:28:58,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-09-21 10:28:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 10:28:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 10:28:58,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-09-21 10:28:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,529 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 10:28:58,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 10:28:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:28:58,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:28:58,530 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-09-21 10:28:58,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332293548] [2020-09-21 10:28:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:28:58,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332293548] [2020-09-21 10:28:58,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:58,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465796989] [2020-09-21 10:28:58,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:58,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:58,762 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-09-21 10:28:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,952 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-21 10:28:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:58,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-09-21 10:28:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,955 INFO L225 Difference]: With dead ends: 31 [2020-09-21 10:28:58,955 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:28:58,956 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 10:28:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:28:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-21 10:28:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:28:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 10:28:58,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-09-21 10:28:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,970 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 10:28:58,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:58,972 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 10:28:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 10:28:58,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:58,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:58,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:28:58,974 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-09-21 10:28:58,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:58,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809182865] [2020-09-21 10:28:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:59,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:59,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809182865] [2020-09-21 10:28:59,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:59,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:59,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045297526] [2020-09-21 10:28:59,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:59,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:59,082 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-09-21 10:28:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:59,121 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-21 10:28:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:59,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-21 10:28:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:59,123 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:28:59,123 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 10:28:59,124 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 10:28:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 10:28:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-21 10:28:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:28:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-21 10:28:59,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-09-21 10:28:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:59,130 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-21 10:28:59,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-21 10:28:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:28:59,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:59,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:59,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:28:59,132 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-09-21 10:28:59,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:59,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642869381] [2020-09-21 10:28:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:59,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:59,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642869381] [2020-09-21 10:28:59,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:59,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:59,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197142640] [2020-09-21 10:28:59,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:59,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:59,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:59,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:59,225 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-09-21 10:28:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:59,287 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-09-21 10:28:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:59,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-21 10:28:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:59,289 INFO L225 Difference]: With dead ends: 42 [2020-09-21 10:28:59,289 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 10:28:59,290 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 10:28:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 10:28:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-21 10:28:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:28:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-21 10:28:59,295 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-09-21 10:28:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:59,296 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-21 10:28:59,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-21 10:28:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:28:59,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:59,297 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:59,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:28:59,298 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-09-21 10:28:59,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:59,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134673884] [2020-09-21 10:28:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:59,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:59,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134673884] [2020-09-21 10:28:59,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:59,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:28:59,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586354440] [2020-09-21 10:28:59,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:28:59,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:28:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:59,419 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-21 10:28:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:59,494 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-09-21 10:28:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:28:59,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-09-21 10:28:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:59,496 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:28:59,496 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 10:28:59,497 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 10:28:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 10:28:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 10:28:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:28:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 10:28:59,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-09-21 10:28:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:59,504 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 10:28:59,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:28:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 10:28:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 10:28:59,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:59,505 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:59,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:28:59,506 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:59,506 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-09-21 10:28:59,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:59,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499219027] [2020-09-21 10:28:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:28:59,529 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:28:59,529 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:28:59,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:28:59,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:59 BoogieIcfgContainer [2020-09-21 10:28:59,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:59,560 INFO L168 Benchmark]: Toolchain (without parser) took 2944.72 ms. Allocated memory was 142.6 MB in the beginning and 232.3 MB in the end (delta: 89.7 MB). Free memory was 105.9 MB in the beginning and 90.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 105.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,561 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 142.6 MB. Free memory was 124.2 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:28:59,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.92 ms. Allocated memory is still 142.6 MB. Free memory was 105.3 MB in the beginning and 96.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,563 INFO L168 Benchmark]: Boogie Preprocessor took 111.63 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 96.0 MB in the beginning and 183.6 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,564 INFO L168 Benchmark]: RCFGBuilder took 280.12 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 171.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,564 INFO L168 Benchmark]: TraceAbstraction took 2231.18 ms. Allocated memory was 204.5 MB in the beginning and 232.3 MB in the end (delta: 27.8 MB). Free memory was 171.0 MB in the beginning and 90.2 MB in the end (delta: 80.8 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:59,573 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 142.6 MB. Free memory was 124.2 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.92 ms. Allocated memory is still 142.6 MB. Free memory was 105.3 MB in the beginning and 96.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.63 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 96.0 MB in the beginning and 183.6 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.12 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 171.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2231.18 ms. Allocated memory was 204.5 MB in the beginning and 232.3 MB in the end (delta: 27.8 MB). Free memory was 171.0 MB in the beginning and 90.2 MB in the end (delta: 80.8 MB). Peak memory consumption was 108.6 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i