/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=LOWLEXORDER --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/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:15:56,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:15:56,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:15:56,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:15:56,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:15:56,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:15:56,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:15:56,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:15:56,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:15:56,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:15:56,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:15:56,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:15:56,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:15:56,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:15:56,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:15:56,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:15:56,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:15:56,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:15:56,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:15:56,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:15:56,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:15:56,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:15:56,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:15:56,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:15:56,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:15:56,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:15:56,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:15:56,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:15:56,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:15:56,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:15:56,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:15:56,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:15:56,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:15:56,390 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:15:56,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:15:56,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:15:56,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:15:56,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:15:56,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:15:56,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:15:56,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:15:56,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:15:56,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:15:56,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:15:56,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:15:56,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:15:56,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:15:56,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:15:56,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:15:56,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:15:56,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:15:56,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:15:56,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:15:56,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:15:56,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:15:56,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:15:56,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:15:56,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:15:56,400 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:15:56,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:15:56,731 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:15:56,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:15:56,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:15:56,742 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:15:56,743 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-21 18:15:56,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7e3c6c34/f6583cdb5fae48d0896662ea51ef479d/FLAG5dea3817b [2020-08-21 18:15:57,200 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:15:57,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-08-21 18:15:57,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7e3c6c34/f6583cdb5fae48d0896662ea51ef479d/FLAG5dea3817b [2020-08-21 18:15:57,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7e3c6c34/f6583cdb5fae48d0896662ea51ef479d [2020-08-21 18:15:57,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:15:57,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:15:57,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:57,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:15:57,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:15:57,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57, skipping insertion in model container [2020-08-21 18:15:57,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:15:57,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:15:57,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:57,804 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:15:57,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:57,829 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:15:57,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57 WrapperNode [2020-08-21 18:15:57,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:57,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:15:57,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:15:57,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:15:57,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... [2020-08-21 18:15:57,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:15:57,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:15:57,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:15:57,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:15:57,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:15:58,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:15:58,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:15:58,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:15:58,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:15:58,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:15:58,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:15:58,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 18:15:58,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:15:58,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:15:58,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:15:58,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:15:58,291 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:15:58,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:58 BoogieIcfgContainer [2020-08-21 18:15:58,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:15:58,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:15:58,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:15:58,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:15:58,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:15:57" (1/3) ... [2020-08-21 18:15:58,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289ab052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:58, skipping insertion in model container [2020-08-21 18:15:58,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:57" (2/3) ... [2020-08-21 18:15:58,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289ab052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:58, skipping insertion in model container [2020-08-21 18:15:58,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:58" (3/3) ... [2020-08-21 18:15:58,305 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-21 18:15:58,316 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:15:58,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:15:58,340 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:15:58,367 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:15:58,367 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:15:58,367 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:15:58,367 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:15:58,367 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:15:58,368 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:15:58,368 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:15:58,368 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:15:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 18:15:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 18:15:58,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:58,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:58,397 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-21 18:15:58,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:58,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430815273] [2020-08-21 18:15:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:58,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:58,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430815273] [2020-08-21 18:15:58,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:58,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 18:15:58,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124622451] [2020-08-21 18:15:58,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 18:15:58,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 18:15:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 18:15:58,660 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-21 18:15:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:58,690 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-21 18:15:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 18:15:58,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 18:15:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:58,702 INFO L225 Difference]: With dead ends: 30 [2020-08-21 18:15:58,702 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 18:15:58,707 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 [2020-08-21 18:15:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 18:15:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 18:15:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 18:15:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-21 18:15:58,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-21 18:15:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:58,755 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-21 18:15:58,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 18:15:58,755 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-21 18:15:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 18:15:58,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:58,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:58,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:15:58,757 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-21 18:15:58,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:58,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460402617] [2020-08-21 18:15:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:58,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460402617] [2020-08-21 18:15:58,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:58,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:15:58,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451852539] [2020-08-21 18:15:58,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:15:58,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:15:58,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:15:58,854 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-21 18:15:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:58,894 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-21 18:15:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:15:58,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-21 18:15:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:58,897 INFO L225 Difference]: With dead ends: 21 [2020-08-21 18:15:58,897 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 18:15:58,898 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 [2020-08-21 18:15:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 18:15:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 18:15:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 18:15:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-21 18:15:58,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-21 18:15:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:58,905 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-21 18:15:58,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:15:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-21 18:15:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:15:58,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:58,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:58,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:15:58,907 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-21 18:15:58,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:58,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576150110] [2020-08-21 18:15:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:59,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576150110] [2020-08-21 18:15:59,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:15:59,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:15:59,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600978335] [2020-08-21 18:15:59,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:15:59,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:15:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:15:59,206 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2020-08-21 18:15:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:59,370 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-21 18:15:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:15:59,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-08-21 18:15:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:59,374 INFO L225 Difference]: With dead ends: 28 [2020-08-21 18:15:59,374 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 18:15:59,375 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 [2020-08-21 18:15:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 18:15:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-21 18:15:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 18:15:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-21 18:15:59,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-21 18:15:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:59,383 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-21 18:15:59,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:15:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-21 18:15:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:15:59,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:59,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:59,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:15:59,385 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-21 18:15:59,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:59,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203851017] [2020-08-21 18:15:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 18:15:59,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203851017] [2020-08-21 18:15:59,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:59,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:15:59,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721651495] [2020-08-21 18:15:59,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:15:59,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:59,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:15:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:15:59,424 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-08-21 18:15:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:59,468 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-21 18:15:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:15:59,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 18:15:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:59,470 INFO L225 Difference]: With dead ends: 28 [2020-08-21 18:15:59,470 INFO L226 Difference]: Without dead ends: 17 [2020-08-21 18:15:59,472 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 [2020-08-21 18:15:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-21 18:15:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-21 18:15:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-21 18:15:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-21 18:15:59,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2020-08-21 18:15:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:59,485 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-21 18:15:59,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:15:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-21 18:15:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:15:59,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:59,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:59,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:15:59,486 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 2 times [2020-08-21 18:15:59,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:59,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114998153] [2020-08-21 18:15:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:59,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114998153] [2020-08-21 18:15:59,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:15:59,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:15:59,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236035652] [2020-08-21 18:15:59,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:15:59,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:15:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:15:59,556 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-08-21 18:15:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:59,589 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-21 18:15:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:15:59,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-21 18:15:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:59,591 INFO L225 Difference]: With dead ends: 27 [2020-08-21 18:15:59,591 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 18:15:59,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:15:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 18:15:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-21 18:15:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 18:15:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 18:15:59,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-08-21 18:15:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:59,599 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 18:15:59,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:15:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 18:15:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:15:59,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:59,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:59,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:15:59,600 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-21 18:15:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:59,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022998609] [2020-08-21 18:15:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:15:59,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022998609] [2020-08-21 18:15:59,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:15:59,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:15:59,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852134110] [2020-08-21 18:15:59,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:15:59,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:59,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:15:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:15:59,882 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-08-21 18:16:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,063 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-21 18:16:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:00,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-08-21 18:16:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,065 INFO L225 Difference]: With dead ends: 27 [2020-08-21 18:16:00,065 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 18:16:00,066 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 [2020-08-21 18:16:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 18:16:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-21 18:16:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 18:16:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-21 18:16:00,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-21 18:16:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,072 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-21 18:16:00,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:16:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-21 18:16:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:16:00,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:16:00,074 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 3 times [2020-08-21 18:16:00,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029791596] [2020-08-21 18:16:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029791596] [2020-08-21 18:16:00,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:16:00,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217103501] [2020-08-21 18:16:00,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:16:00,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:16:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:16:00,121 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-21 18:16:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,152 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 18:16:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:16:00,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 18:16:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,153 INFO L225 Difference]: With dead ends: 33 [2020-08-21 18:16:00,154 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 18:16:00,154 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 [2020-08-21 18:16:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 18:16:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-21 18:16:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 18:16:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 18:16:00,160 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-21 18:16:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,161 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 18:16:00,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:16:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 18:16:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:16:00,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,162 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:16:00,162 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 4 times [2020-08-21 18:16:00,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036170918] [2020-08-21 18:16:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036170918] [2020-08-21 18:16:00,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:16:00,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176302772] [2020-08-21 18:16:00,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:16:00,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:16:00,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:16:00,228 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-08-21 18:16:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,274 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-21 18:16:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:16:00,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 18:16:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,277 INFO L225 Difference]: With dead ends: 36 [2020-08-21 18:16:00,277 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 18:16:00,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:16:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 18:16:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-21 18:16:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 18:16:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-21 18:16:00,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-08-21 18:16:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,288 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-21 18:16:00,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:16:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-21 18:16:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:16:00,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:16:00,290 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 5 times [2020-08-21 18:16:00,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630810289] [2020-08-21 18:16:00,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630810289] [2020-08-21 18:16:00,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:16:00,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987623969] [2020-08-21 18:16:00,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:16:00,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:16:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:16:00,374 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-21 18:16:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,415 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 18:16:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:16:00,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 18:16:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,416 INFO L225 Difference]: With dead ends: 39 [2020-08-21 18:16:00,417 INFO L226 Difference]: Without dead ends: 31 [2020-08-21 18:16:00,417 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 [2020-08-21 18:16:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-21 18:16:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-21 18:16:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 18:16:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-21 18:16:00,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-21 18:16:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,424 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-21 18:16:00,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:16:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-21 18:16:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:16:00,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,425 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:16:00,425 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 6 times [2020-08-21 18:16:00,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095928956] [2020-08-21 18:16:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095928956] [2020-08-21 18:16:00,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:16:00,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046996621] [2020-08-21 18:16:00,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:16:00,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:16:00,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:16:00,500 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-21 18:16:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,547 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-21 18:16:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:16:00,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-21 18:16:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,548 INFO L225 Difference]: With dead ends: 42 [2020-08-21 18:16:00,548 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 18:16:00,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:16:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 18:16:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-21 18:16:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 18:16:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-21 18:16:00,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-21 18:16:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,556 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-21 18:16:00,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:16:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-21 18:16:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:16:00,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,558 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:16:00,558 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,559 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 7 times [2020-08-21 18:16:00,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347901958] [2020-08-21 18:16:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347901958] [2020-08-21 18:16:00,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:16:00,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631648599] [2020-08-21 18:16:00,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:16:00,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:16:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:16:00,666 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-21 18:16:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,720 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-21 18:16:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:00,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-21 18:16:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,722 INFO L225 Difference]: With dead ends: 45 [2020-08-21 18:16:00,722 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 18:16:00,723 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 [2020-08-21 18:16:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 18:16:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-21 18:16:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:16:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 18:16:00,729 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-21 18:16:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,729 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 18:16:00,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:16:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 18:16:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 18:16:00,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,731 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:16:00,731 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 8 times [2020-08-21 18:16:00,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164291027] [2020-08-21 18:16:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:00,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164291027] [2020-08-21 18:16:00,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:00,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:16:00,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653472005] [2020-08-21 18:16:00,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:16:00,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:16:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:16:00,839 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-21 18:16:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:00,895 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-21 18:16:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:16:00,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-21 18:16:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:00,896 INFO L225 Difference]: With dead ends: 48 [2020-08-21 18:16:00,896 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 18:16:00,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:16:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 18:16:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-21 18:16:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:16:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-21 18:16:00,902 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-21 18:16:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:00,903 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-21 18:16:00,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:16:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-21 18:16:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 18:16:00,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:00,904 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:00,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:16:00,904 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 9 times [2020-08-21 18:16:00,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:00,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527315207] [2020-08-21 18:16:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:01,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527315207] [2020-08-21 18:16:01,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:01,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:16:01,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025598305] [2020-08-21 18:16:01,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:16:01,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:16:01,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:16:01,026 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-21 18:16:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:01,096 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-21 18:16:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:16:01,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-21 18:16:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:01,097 INFO L225 Difference]: With dead ends: 51 [2020-08-21 18:16:01,097 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 18:16:01,098 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 [2020-08-21 18:16:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 18:16:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-21 18:16:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:16:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-21 18:16:01,103 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-21 18:16:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:01,104 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-21 18:16:01,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:16:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-21 18:16:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 18:16:01,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:01,105 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:01,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:16:01,105 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 10 times [2020-08-21 18:16:01,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:01,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904092184] [2020-08-21 18:16:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:16:01,124 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:16:01,124 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:16:01,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:16:01,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:16:01 BoogieIcfgContainer [2020-08-21 18:16:01,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:16:01,151 INFO L168 Benchmark]: Toolchain (without parser) took 3567.14 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.8 MB in the beginning and 178.0 MB in the end (delta: -75.1 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,151 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:16:01,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.97 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,153 INFO L168 Benchmark]: Boogie Preprocessor took 119.64 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 182.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,153 INFO L168 Benchmark]: RCFGBuilder took 344.40 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,154 INFO L168 Benchmark]: TraceAbstraction took 2851.53 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 169.2 MB in the beginning and 178.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:01,158 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.97 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.64 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 182.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.40 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2851.53 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 169.2 MB in the beginning and 178.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 59 SDslu, 484 SDs, 0 SdLazy, 391 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 16404 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 86/415 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...