/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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 03:09:47,436 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 03:09:47,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:09:47,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:09:47,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:09:47,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:09:47,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:09:47,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:09:47,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:09:47,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:09:47,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:09:47,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:09:47,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:09:47,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:09:47,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:09:47,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:09:47,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:09:47,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:09:47,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:09:47,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:09:47,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:09:47,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:09:47,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 03:09:47,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:09:47,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:09:47,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:09:47,522 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 03:09:47,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:09:47,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:09:47,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:09:47,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:09:47,546 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:09:47,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:09:47,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:09:47,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:09:47,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:09:47,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:09:47,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:09:47,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:09:47,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:09:47,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:09:47,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:09:47,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:09:47,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:09:47,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:09:47,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:09:47,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:09:47,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:09:47,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:09:47,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:09:47,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:09:47,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:09:47,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:09:47,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:09:47,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:09:47,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:09:47,551 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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-08-22 03:09:47,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:09:47,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:09:47,844 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:09:47,846 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:09:47,846 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:09:47,847 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 03:09:47,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de006926c/2cc191a9bd20402da7388d43181f1273/FLAGbcf62a4ee [2020-08-22 03:09:48,377 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:09:48,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 03:09:48,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de006926c/2cc191a9bd20402da7388d43181f1273/FLAGbcf62a4ee [2020-08-22 03:09:48,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de006926c/2cc191a9bd20402da7388d43181f1273 [2020-08-22 03:09:48,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:09:48,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:09:48,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:09:48,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:09:48,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:09:48,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:48,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dc5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48, skipping insertion in model container [2020-08-22 03:09:48,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:48,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:09:48,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:09:48,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:09:48,964 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:09:48,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:09:48,995 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:09:48,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48 WrapperNode [2020-08-22 03:09:48,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:09:48,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:09:48,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:09:48,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:09:49,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (1/1) ... [2020-08-22 03:09:49,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:09:49,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:09:49,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:09:49,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:09:49,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (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 03:09:49,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:09:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:09:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 03:09:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:09:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:09:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 03:09:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 03:09:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:09:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:09:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:09:49,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:09:49,371 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:09:49,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:09:49 BoogieIcfgContainer [2020-08-22 03:09:49,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:09:49,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:09:49,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:09:49,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:09:49,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:09:48" (1/3) ... [2020-08-22 03:09:49,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a132bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:09:49, skipping insertion in model container [2020-08-22 03:09:49,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:09:48" (2/3) ... [2020-08-22 03:09:49,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a132bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:09:49, skipping insertion in model container [2020-08-22 03:09:49,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:09:49" (3/3) ... [2020-08-22 03:09:49,383 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-22 03:09:49,394 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:09:49,402 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:09:49,417 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:09:49,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:09:49,488 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:09:49,489 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:09:49,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:09:49,489 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:09:49,489 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:09:49,489 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:09:49,489 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:09:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 03:09:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 03:09:49,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:49,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:49,544 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-22 03:09:49,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:49,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618904881] [2020-08-22 03:09:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:49,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:49,670 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 03:09:49,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618904881] [2020-08-22 03:09:49,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:09:49,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 03:09:49,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35331944] [2020-08-22 03:09:49,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 03:09:49,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 03:09:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 03:09:49,691 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-22 03:09:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:49,711 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-22 03:09:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 03:09:49,712 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 03:09:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:49,720 INFO L225 Difference]: With dead ends: 31 [2020-08-22 03:09:49,721 INFO L226 Difference]: Without dead ends: 14 [2020-08-22 03:09:49,724 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 03:09:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-22 03:09:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-22 03:09:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-22 03:09:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-22 03:09:49,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-22 03:09:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:49,761 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-22 03:09:49,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 03:09:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-22 03:09:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 03:09:49,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:49,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:49,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:09:49,764 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-22 03:09:49,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:49,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735066531] [2020-08-22 03:09:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:49,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:49,859 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 03:09:49,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735066531] [2020-08-22 03:09:49,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:09:49,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:09:49,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530721873] [2020-08-22 03:09:49,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:09:49,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:09:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:09:49,864 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-22 03:09:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:49,910 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-22 03:09:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:09:49,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 03:09:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:49,913 INFO L225 Difference]: With dead ends: 23 [2020-08-22 03:09:49,913 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 03:09:49,914 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 03:09:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 03:09:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 03:09:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 03:09:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-22 03:09:49,921 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-22 03:09:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:49,922 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-22 03:09:49,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:09:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-22 03:09:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:09:49,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:49,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:49,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:09:49,924 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-22 03:09:49,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:49,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042893782] [2020-08-22 03:09:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,264 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 03:09:50,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042893782] [2020-08-22 03:09:50,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:09:50,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:09:50,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488694270] [2020-08-22 03:09:50,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:09:50,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:09:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:09:50,268 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-22 03:09:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:50,387 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 03:09:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:09:50,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-22 03:09:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:50,390 INFO L225 Difference]: With dead ends: 33 [2020-08-22 03:09:50,391 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 03:09:50,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:09:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 03:09:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-22 03:09:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 03:09:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-22 03:09:50,399 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-22 03:09:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:50,400 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-22 03:09:50,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:09:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-22 03:09:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:09:50,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:50,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:50,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:09:50,402 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-22 03:09:50,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:50,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831693892] [2020-08-22 03:09:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,433 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 03:09:50,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831693892] [2020-08-22 03:09:50,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:09:50,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:09:50,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165499095] [2020-08-22 03:09:50,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:09:50,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:50,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:09:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:09:50,437 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-22 03:09:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:50,456 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-22 03:09:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:09:50,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:09:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:50,458 INFO L225 Difference]: With dead ends: 32 [2020-08-22 03:09:50,459 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 03:09:50,459 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 03:09:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 03:09:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 03:09:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 03:09:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-22 03:09:50,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-22 03:09:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:50,466 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-22 03:09:50,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:09:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-22 03:09:50,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:09:50,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:50,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:50,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:09:50,468 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:50,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-22 03:09:50,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:50,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597362295] [2020-08-22 03:09:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,519 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 03:09:50,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597362295] [2020-08-22 03:09:50,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:09:50,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:09:50,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457394193] [2020-08-22 03:09:50,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:09:50,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:50,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:09:50,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:09:50,523 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-22 03:09:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:50,562 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 03:09:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:09:50,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 03:09:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:50,564 INFO L225 Difference]: With dead ends: 30 [2020-08-22 03:09:50,565 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 03:09:50,565 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 03:09:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 03:09:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-22 03:09:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 03:09:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 03:09:50,585 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-22 03:09:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:50,586 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 03:09:50,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:09:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 03:09:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:09:50,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:50,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:50,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:09:50,587 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:50,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-22 03:09:50,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:50,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442702475] [2020-08-22 03:09:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:50,839 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 03:09:50,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442702475] [2020-08-22 03:09:50,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:09:50,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:09:50,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164980333] [2020-08-22 03:09:50,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:09:50,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:09:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:09:50,841 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-22 03:09:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:51,029 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-22 03:09:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:09:51,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-22 03:09:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:51,033 INFO L225 Difference]: With dead ends: 31 [2020-08-22 03:09:51,033 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 03:09:51,036 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 03:09:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 03:09:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-22 03:09:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 03:09:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-22 03:09:51,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-22 03:09:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:51,046 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-22 03:09:51,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:09:51,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-22 03:09:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:09:51,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:51,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:51,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:09:51,051 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-22 03:09:51,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:51,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740938537] [2020-08-22 03:09:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:51,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:51,109 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 03:09:51,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740938537] [2020-08-22 03:09:51,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:09:51,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:09:51,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609858571] [2020-08-22 03:09:51,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:09:51,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:09:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:09:51,112 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-22 03:09:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:51,153 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-22 03:09:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:09:51,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 03:09:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:51,155 INFO L225 Difference]: With dead ends: 38 [2020-08-22 03:09:51,155 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 03:09:51,155 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 03:09:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 03:09:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-22 03:09:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 03:09:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-22 03:09:51,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-22 03:09:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:51,161 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-22 03:09:51,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:09:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-22 03:09:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:09:51,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:51,162 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:51,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:09:51,163 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:51,163 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-22 03:09:51,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:51,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438247430] [2020-08-22 03:09:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:51,295 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 03:09:51,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438247430] [2020-08-22 03:09:51,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:09:51,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:09:51,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095939048] [2020-08-22 03:09:51,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:09:51,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:09:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:09:51,298 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-22 03:09:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:51,372 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-22 03:09:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:09:51,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 03:09:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:51,374 INFO L225 Difference]: With dead ends: 42 [2020-08-22 03:09:51,374 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 03:09:51,375 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 03:09:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 03:09:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 03:09:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 03:09:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 03:09:51,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-22 03:09:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:51,386 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 03:09:51,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:09:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 03:09:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 03:09:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:51,389 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:51,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:09:51,389 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-22 03:09:51,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:51,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563513747] [2020-08-22 03:09:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:51,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:09:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:09:51,535 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 03:09:51,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563513747] [2020-08-22 03:09:51,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:09:51,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:09:51,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83741232] [2020-08-22 03:09:51,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:09:51,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:09:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:09:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:09:51,538 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-22 03:09:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:09:51,606 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-22 03:09:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:09:51,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 03:09:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:09:51,607 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:09:51,607 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 03:09:51,608 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 03:09:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 03:09:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-22 03:09:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:09:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 03:09:51,614 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-22 03:09:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:09:51,615 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 03:09:51,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:09:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 03:09:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 03:09:51,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:09:51,616 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:09:51,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:09:51,617 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:09:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:09:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-22 03:09:51,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:09:51,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211035094] [2020-08-22 03:09:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:09:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:09:51,633 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:09:51,634 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:09:51,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:09:51,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:09:51 BoogieIcfgContainer [2020-08-22 03:09:51,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:09:51,658 INFO L168 Benchmark]: Toolchain (without parser) took 2896.80 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 104.1 MB in the beginning and 96.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 102.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:09:51,659 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:09:51,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.29 ms. Allocated memory is still 140.5 MB. Free memory was 103.9 MB in the beginning and 94.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:09:51,660 INFO L168 Benchmark]: Boogie Preprocessor took 107.70 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.5 MB in the beginning and 183.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:09:51,661 INFO L168 Benchmark]: RCFGBuilder took 270.41 ms. Allocated memory is still 203.9 MB. Free memory was 183.6 MB in the beginning and 170.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:09:51,662 INFO L168 Benchmark]: TraceAbstraction took 2278.73 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 169.9 MB in the beginning and 96.5 MB in the end (delta: 73.5 MB). Peak memory consumption was 104.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:09:51,666 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.29 ms. Allocated memory is still 140.5 MB. Free memory was 103.9 MB in the beginning and 94.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.70 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.5 MB in the beginning and 183.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 270.41 ms. Allocated memory is still 203.9 MB. Free memory was 183.6 MB in the beginning and 170.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2278.73 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 169.9 MB in the beginning and 96.5 MB in the end (delta: 73.5 MB). Peak memory consumption was 104.9 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