/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:32:41,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:32:41,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:32:41,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 01:32:41,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:32:41,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:32:41,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:32:41,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:32:41,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:32:41,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:32:41,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:32:41,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:32:41,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:32:41,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:32:41,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:32:41,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:32:41,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:32:41,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:32:41,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:32:41,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:32:41,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:32:41,565 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:32:41,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:32:41,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:32:41,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:32:41,567 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:32:41,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:32:41,568 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:32:41,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:32:41,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:32:41,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:32:41,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:32:41,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:32:41,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:32:41,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:32:41,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:32:41,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:32:41,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:32:41,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:32:41,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:32:41,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:32:41,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:32:41,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:32:41,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:32:41,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:32:41,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:32:41,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:32:41,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:32:41,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:32:41,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:32:41,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:32:41,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:32:41,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:32:41,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:32:41,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:32:41,892 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:32:41,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 01:32:41,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3566233bf/df8bd0f0ac6542b691b85b4b765af9e5/FLAGc4eb62eb9 [2020-08-22 01:32:42,401 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:32:42,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 01:32:42,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3566233bf/df8bd0f0ac6542b691b85b4b765af9e5/FLAGc4eb62eb9 [2020-08-22 01:32:42,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3566233bf/df8bd0f0ac6542b691b85b4b765af9e5 [2020-08-22 01:32:42,739 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:32:42,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:32:42,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:42,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:32:42,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:32:42,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:42" (1/1) ... [2020-08-22 01:32:42,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e38c3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:42, skipping insertion in model container [2020-08-22 01:32:42,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:32:42" (1/1) ... [2020-08-22 01:32:42,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:32:42,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:32:42,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:43,002 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:32:43,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:32:43,026 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:32:43,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43 WrapperNode [2020-08-22 01:32:43,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:32:43,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:32:43,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:32:43,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:32:43,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... [2020-08-22 01:32:43,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:32:43,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:32:43,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:32:43,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:32:43,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:32:43,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:32:43,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:32:43,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:32:43,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:32:43,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:32:43,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:32:43,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 01:32:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:32:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:32:43,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:32:43,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:32:43,366 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 01:32:43,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:43 BoogieIcfgContainer [2020-08-22 01:32:43,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:32:43,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:32:43,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:32:43,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:32:43,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:32:42" (1/3) ... [2020-08-22 01:32:43,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a5ac7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:43, skipping insertion in model container [2020-08-22 01:32:43,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:32:43" (2/3) ... [2020-08-22 01:32:43,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a5ac7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:43, skipping insertion in model container [2020-08-22 01:32:43,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:43" (3/3) ... [2020-08-22 01:32:43,377 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-22 01:32:43,387 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:32:43,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:32:43,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:32:43,457 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:32:43,458 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:32:43,458 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:32:43,458 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:32:43,458 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:32:43,459 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:32:43,459 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:32:43,459 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:32:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 01:32:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 01:32:43,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:43,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:43,497 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-22 01:32:43,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:43,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351691175] [2020-08-22 01:32:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:43,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:43,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351691175] [2020-08-22 01:32:43,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:43,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 01:32:43,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188829103] [2020-08-22 01:32:43,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 01:32:43,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 01:32:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 01:32:43,662 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-22 01:32:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:43,682 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-22 01:32:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 01:32:43,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 01:32:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:43,690 INFO L225 Difference]: With dead ends: 31 [2020-08-22 01:32:43,691 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 01:32:43,694 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 [2020-08-22 01:32:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 01:32:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 01:32:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 01:32:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-22 01:32:43,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-22 01:32:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:43,731 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-22 01:32:43,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 01:32:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-22 01:32:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 01:32:43,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:43,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:43,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:32:43,733 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:43,734 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-22 01:32:43,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:43,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586354798] [2020-08-22 01:32:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:43,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:43,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586354798] [2020-08-22 01:32:43,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:43,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:32:43,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878907050] [2020-08-22 01:32:43,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:43,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:43,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:43,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:43,827 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-22 01:32:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:43,868 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-22 01:32:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:32:43,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 01:32:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:43,869 INFO L225 Difference]: With dead ends: 23 [2020-08-22 01:32:43,870 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 01:32:43,872 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 [2020-08-22 01:32:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 01:32:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 01:32:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 01:32:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-22 01:32:43,877 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-22 01:32:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:43,878 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-22 01:32:43,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-22 01:32:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:32:43,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:43,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:43,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:32:43,880 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-22 01:32:43,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:43,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103587772] [2020-08-22 01:32:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:44,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103587772] [2020-08-22 01:32:44,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:44,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:32:44,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587855508] [2020-08-22 01:32:44,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:32:44,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:32:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:44,138 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-22 01:32:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:44,242 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 01:32:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:32:44,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-22 01:32:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:44,245 INFO L225 Difference]: With dead ends: 33 [2020-08-22 01:32:44,245 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 01:32:44,247 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 [2020-08-22 01:32:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 01:32:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-22 01:32:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 01:32:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-22 01:32:44,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-22 01:32:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:44,254 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-22 01:32:44,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:32:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-22 01:32:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:32:44,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:44,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:44,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:32:44,256 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-22 01:32:44,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:44,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809346891] [2020-08-22 01:32:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 01:32:44,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809346891] [2020-08-22 01:32:44,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:44,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:32:44,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553624136] [2020-08-22 01:32:44,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:32:44,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:32:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:32:44,293 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-22 01:32:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:44,311 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-22 01:32:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:32:44,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 01:32:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:44,313 INFO L225 Difference]: With dead ends: 32 [2020-08-22 01:32:44,313 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 01:32:44,314 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 [2020-08-22 01:32:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 01:32:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 01:32:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 01:32:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-22 01:32:44,319 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-22 01:32:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:44,320 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-22 01:32:44,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:32:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-22 01:32:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:32:44,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:44,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:44,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:32:44,322 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-22 01:32:44,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:44,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111743467] [2020-08-22 01:32:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:44,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111743467] [2020-08-22 01:32:44,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:44,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:32:44,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301469628] [2020-08-22 01:32:44,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:44,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:44,402 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-22 01:32:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:44,436 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 01:32:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:32:44,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 01:32:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:44,438 INFO L225 Difference]: With dead ends: 30 [2020-08-22 01:32:44,438 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 01:32:44,439 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 [2020-08-22 01:32:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 01:32:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-22 01:32:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 01:32:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 01:32:44,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-22 01:32:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:44,445 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 01:32:44,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 01:32:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:32:44,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:44,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:44,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:32:44,447 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-22 01:32:44,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:44,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454076444] [2020-08-22 01:32:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:32:44,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454076444] [2020-08-22 01:32:44,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:44,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:32:44,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971658203] [2020-08-22 01:32:44,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:32:44,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:32:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:32:44,647 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-22 01:32:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:44,816 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-22 01:32:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:32:44,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-22 01:32:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:44,817 INFO L225 Difference]: With dead ends: 31 [2020-08-22 01:32:44,818 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 01:32:44,818 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 [2020-08-22 01:32:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 01:32:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-22 01:32:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 01:32:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-22 01:32:44,824 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-22 01:32:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:44,824 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-22 01:32:44,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:32:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-22 01:32:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:32:44,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:44,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:44,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:32:44,826 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:44,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-22 01:32:44,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:44,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589019445] [2020-08-22 01:32:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:44,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589019445] [2020-08-22 01:32:44,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:44,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:32:44,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437742726] [2020-08-22 01:32:44,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:32:44,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:32:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:44,904 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-22 01:32:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:44,951 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-22 01:32:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:32:44,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 01:32:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:44,953 INFO L225 Difference]: With dead ends: 38 [2020-08-22 01:32:44,953 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 01:32:44,954 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 [2020-08-22 01:32:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 01:32:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-22 01:32:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 01:32:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-22 01:32:44,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-22 01:32:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:44,960 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-22 01:32:44,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:32:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-22 01:32:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 01:32:44,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:44,962 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:44,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:32:44,963 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-22 01:32:44,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:44,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525549579] [2020-08-22 01:32:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:45,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525549579] [2020-08-22 01:32:45,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:45,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:32:45,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361009371] [2020-08-22 01:32:45,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:32:45,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:32:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:45,061 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-22 01:32:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:45,119 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-22 01:32:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:32:45,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 01:32:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:45,121 INFO L225 Difference]: With dead ends: 42 [2020-08-22 01:32:45,121 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 01:32:45,121 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 [2020-08-22 01:32:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 01:32:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 01:32:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 01:32:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 01:32:45,127 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-22 01:32:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:45,127 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 01:32:45,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:32:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 01:32:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:32:45,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:45,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:45,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:32:45,129 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-22 01:32:45,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:45,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631741572] [2020-08-22 01:32:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:45,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631741572] [2020-08-22 01:32:45,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:45,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:32:45,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519263371] [2020-08-22 01:32:45,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:32:45,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:32:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:45,244 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-22 01:32:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:45,320 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-22 01:32:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:32:45,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 01:32:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:45,322 INFO L225 Difference]: With dead ends: 46 [2020-08-22 01:32:45,322 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 01:32:45,323 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 [2020-08-22 01:32:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 01:32:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-22 01:32:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 01:32:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 01:32:45,329 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-22 01:32:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:45,330 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 01:32:45,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:32:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 01:32:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 01:32:45,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:45,331 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:45,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:32:45,332 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:45,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:45,332 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-22 01:32:45,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:45,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081853003] [2020-08-22 01:32:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:32:45,352 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:32:45,353 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:32:45,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:32:45,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:32:45 BoogieIcfgContainer [2020-08-22 01:32:45,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:32:45,376 INFO L168 Benchmark]: Toolchain (without parser) took 2634.58 ms. Allocated memory was 146.3 MB in the beginning and 235.4 MB in the end (delta: 89.1 MB). Free memory was 102.6 MB in the beginning and 97.0 MB in the end (delta: 5.6 MB). Peak memory consumption was 94.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:45,377 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:32:45,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.27 ms. Allocated memory is still 146.3 MB. Free memory was 102.4 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:45,379 INFO L168 Benchmark]: Boogie Preprocessor took 109.34 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:45,379 INFO L168 Benchmark]: RCFGBuilder took 232.43 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 168.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:45,380 INFO L168 Benchmark]: TraceAbstraction took 2003.40 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 168.1 MB in the beginning and 97.0 MB in the end (delta: 71.1 MB). Peak memory consumption was 104.1 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:45,384 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 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.27 ms. Allocated memory is still 146.3 MB. Free memory was 102.4 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.34 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 232.43 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 168.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2003.40 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 168.1 MB in the beginning and 97.0 MB in the end (delta: 71.1 MB). Peak memory consumption was 104.1 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