/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:45:47,543 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 19:45:47,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:45:47,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:45:47,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:45:47,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:45:47,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:45:47,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:45:47,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:45:47,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:45:47,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:45:47,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:45:47,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:45:47,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:45:47,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:45:47,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:45:47,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:45:47,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:45:47,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:45:47,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:45:47,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:45:47,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:45:47,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 19:45:47,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:45:47,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:45:47,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:45:47,664 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 19:45:47,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:45:47,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:45:47,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:45:47,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:45:47,688 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:45:47,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:45:47,689 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:45:47,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:45:47,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:45:47,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:45:47,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:45:47,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:45:47,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:45:47,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:45:47,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:45:47,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:45:47,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:45:47,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:45:47,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:45:47,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:45:47,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:45:47,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:45:47,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:45:47,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:45:47,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:45:47,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:45:47,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:45:47,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:45:47,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:45:47,693 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:45:48,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:45:48,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:45:48,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:45:48,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:45:48,020 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:45:48,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 19:45:48,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e10b61d92/0294ec7b40cf48ba8fcbec886a027c15/FLAG583da581c [2020-08-21 19:45:48,574 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:45:48,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 19:45:48,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e10b61d92/0294ec7b40cf48ba8fcbec886a027c15/FLAG583da581c [2020-08-21 19:45:48,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e10b61d92/0294ec7b40cf48ba8fcbec886a027c15 [2020-08-21 19:45:48,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:45:48,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:45:48,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:48,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:45:48,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:45:48,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:48" (1/1) ... [2020-08-21 19:45:48,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f65ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:48, skipping insertion in model container [2020-08-21 19:45:48,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:45:48" (1/1) ... [2020-08-21 19:45:48,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:45:48,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:45:49,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:49,157 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:45:49,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:45:49,193 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:45:49,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49 WrapperNode [2020-08-21 19:45:49,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:45:49,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:45:49,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:45:49,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:45:49,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (1/1) ... [2020-08-21 19:45:49,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:45:49,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:45:49,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:45:49,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:45:49,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (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 19:45:49,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:45:49,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:45:49,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:45:49,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:45:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:45:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:45:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:45:49,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:45:49,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:45:49,602 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:45:49,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:49 BoogieIcfgContainer [2020-08-21 19:45:49,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:45:49,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:45:49,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:45:49,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:45:49,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:45:48" (1/3) ... [2020-08-21 19:45:49,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31347996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:49, skipping insertion in model container [2020-08-21 19:45:49,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:45:49" (2/3) ... [2020-08-21 19:45:49,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31347996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:45:49, skipping insertion in model container [2020-08-21 19:45:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:45:49" (3/3) ... [2020-08-21 19:45:49,615 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-21 19:45:49,629 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:45:49,647 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:45:49,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:45:49,754 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:45:49,754 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:45:49,754 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:45:49,754 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:45:49,754 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:45:49,755 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:45:49,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:45:49,755 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:45:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 19:45:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 19:45:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:49,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:49,799 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-21 19:45:49,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:49,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802757500] [2020-08-21 19:45:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:49,988 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 19:45:49,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802757500] [2020-08-21 19:45:49,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:49,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:49,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040045972] [2020-08-21 19:45:49,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:49,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,015 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-21 19:45:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,079 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-21 19:45:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 19:45:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,093 INFO L225 Difference]: With dead ends: 57 [2020-08-21 19:45:50,094 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 19:45:50,097 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 19:45:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 19:45:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-21 19:45:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:45:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-21 19:45:50,142 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-21 19:45:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,143 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-21 19:45:50,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-21 19:45:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 19:45:50,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:45:50,145 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,146 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-21 19:45:50,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78699798] [2020-08-21 19:45:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,226 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 19:45:50,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78699798] [2020-08-21 19:45:50,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258176155] [2020-08-21 19:45:50,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,230 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-21 19:45:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,253 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-21 19:45:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 19:45:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,255 INFO L225 Difference]: With dead ends: 67 [2020-08-21 19:45:50,255 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 19:45:50,257 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 19:45:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 19:45:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-21 19:45:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 19:45:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-21 19:45:50,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-21 19:45:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,266 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-21 19:45:50,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-21 19:45:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 19:45:50,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:45:50,268 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-21 19:45:50,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746800595] [2020-08-21 19:45:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,310 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 19:45:50,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746800595] [2020-08-21 19:45:50,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697758435] [2020-08-21 19:45:50,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,313 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-21 19:45:50,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,334 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-21 19:45:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 19:45:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,336 INFO L225 Difference]: With dead ends: 63 [2020-08-21 19:45:50,336 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 19:45:50,337 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 19:45:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 19:45:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-21 19:45:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 19:45:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-21 19:45:50,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-21 19:45:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,346 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-21 19:45:50,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-21 19:45:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 19:45:50,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:45:50,348 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-21 19:45:50,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459939612] [2020-08-21 19:45:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,394 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 19:45:50,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459939612] [2020-08-21 19:45:50,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612201868] [2020-08-21 19:45:50,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,397 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-21 19:45:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,421 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-21 19:45:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 19:45:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,424 INFO L225 Difference]: With dead ends: 76 [2020-08-21 19:45:50,424 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 19:45:50,425 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 19:45:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 19:45:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-21 19:45:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 19:45:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-21 19:45:50,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-21 19:45:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,436 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-21 19:45:50,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-21 19:45:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 19:45:50,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:45:50,438 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-21 19:45:50,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635430605] [2020-08-21 19:45:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,476 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 19:45:50,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635430605] [2020-08-21 19:45:50,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51510736] [2020-08-21 19:45:50,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,479 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-21 19:45:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,512 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-21 19:45:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 19:45:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,514 INFO L225 Difference]: With dead ends: 124 [2020-08-21 19:45:50,514 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 19:45:50,515 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 19:45:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 19:45:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-21 19:45:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 19:45:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-21 19:45:50,525 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-21 19:45:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,526 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-21 19:45:50,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-21 19:45:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 19:45:50,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:45:50,528 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-21 19:45:50,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032664991] [2020-08-21 19:45:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,560 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 19:45:50,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032664991] [2020-08-21 19:45:50,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307146944] [2020-08-21 19:45:50,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,562 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-21 19:45:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,581 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-21 19:45:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 19:45:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,583 INFO L225 Difference]: With dead ends: 111 [2020-08-21 19:45:50,583 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 19:45:50,584 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 19:45:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 19:45:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 19:45:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 19:45:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-21 19:45:50,594 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-21 19:45:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,595 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-21 19:45:50,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-21 19:45:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 19:45:50,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:45:50,597 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-21 19:45:50,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701455981] [2020-08-21 19:45:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,629 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 19:45:50,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701455981] [2020-08-21 19:45:50,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872105391] [2020-08-21 19:45:50,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,632 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-21 19:45:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,662 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-21 19:45:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 19:45:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,665 INFO L225 Difference]: With dead ends: 132 [2020-08-21 19:45:50,665 INFO L226 Difference]: Without dead ends: 130 [2020-08-21 19:45:50,666 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 19:45:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-21 19:45:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-21 19:45:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 19:45:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-21 19:45:50,679 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-21 19:45:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,679 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-21 19:45:50,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-21 19:45:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 19:45:50,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:45:50,682 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-21 19:45:50,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715403444] [2020-08-21 19:45:50,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,715 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 19:45:50,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715403444] [2020-08-21 19:45:50,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919330750] [2020-08-21 19:45:50,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,717 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-21 19:45:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,742 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-21 19:45:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 19:45:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,744 INFO L225 Difference]: With dead ends: 232 [2020-08-21 19:45:50,744 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 19:45:50,745 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 19:45:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 19:45:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 19:45:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 19:45:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-21 19:45:50,765 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-21 19:45:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,765 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-21 19:45:50,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-21 19:45:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:45:50,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:45:50,779 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-21 19:45:50,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253159579] [2020-08-21 19:45:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,805 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 19:45:50,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253159579] [2020-08-21 19:45:50,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265348538] [2020-08-21 19:45:50,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,807 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-21 19:45:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,824 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-21 19:45:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 19:45:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,826 INFO L225 Difference]: With dead ends: 204 [2020-08-21 19:45:50,826 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 19:45:50,827 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 19:45:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 19:45:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-21 19:45:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 19:45:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-21 19:45:50,843 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-21 19:45:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,843 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-21 19:45:50,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-21 19:45:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:45:50,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:45:50,849 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-21 19:45:50,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138996141] [2020-08-21 19:45:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,898 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 19:45:50,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138996141] [2020-08-21 19:45:50,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294962733] [2020-08-21 19:45:50,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,900 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-21 19:45:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:50,919 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-21 19:45:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:50,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 19:45:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:50,922 INFO L225 Difference]: With dead ends: 236 [2020-08-21 19:45:50,922 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 19:45:50,922 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 19:45:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 19:45:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-21 19:45:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 19:45:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-21 19:45:50,949 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-21 19:45:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:50,949 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-21 19:45:50,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-21 19:45:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:45:50,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:50,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:50,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:45:50,952 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-21 19:45:50,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:50,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888707740] [2020-08-21 19:45:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:50,981 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 19:45:50,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888707740] [2020-08-21 19:45:50,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:50,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:50,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214858791] [2020-08-21 19:45:50,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:50,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:50,984 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-21 19:45:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:51,008 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-21 19:45:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:51,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 19:45:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:51,011 INFO L225 Difference]: With dead ends: 444 [2020-08-21 19:45:51,011 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 19:45:51,013 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 19:45:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 19:45:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 19:45:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 19:45:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-21 19:45:51,038 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-21 19:45:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:51,039 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-21 19:45:51,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-21 19:45:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:51,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:51,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:51,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:45:51,045 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-21 19:45:51,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:51,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918343553] [2020-08-21 19:45:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,070 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 19:45:51,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918343553] [2020-08-21 19:45:51,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:51,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:51,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836053760] [2020-08-21 19:45:51,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:51,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:51,073 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-21 19:45:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:51,092 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-21 19:45:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:51,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:51,095 INFO L225 Difference]: With dead ends: 384 [2020-08-21 19:45:51,095 INFO L226 Difference]: Without dead ends: 266 [2020-08-21 19:45:51,096 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 19:45:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-21 19:45:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-21 19:45:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 19:45:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-21 19:45:51,115 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-21 19:45:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:51,115 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-21 19:45:51,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-21 19:45:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:51,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:51,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:51,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:45:51,123 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-21 19:45:51,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:51,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394898205] [2020-08-21 19:45:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,180 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 19:45:51,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394898205] [2020-08-21 19:45:51,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:51,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:51,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454603940] [2020-08-21 19:45:51,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:51,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:51,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:51,186 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-21 19:45:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:51,227 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-21 19:45:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:51,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:51,231 INFO L225 Difference]: With dead ends: 426 [2020-08-21 19:45:51,232 INFO L226 Difference]: Without dead ends: 424 [2020-08-21 19:45:51,234 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 19:45:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-21 19:45:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-21 19:45:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 19:45:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-21 19:45:51,252 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-21 19:45:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:51,253 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-21 19:45:51,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-21 19:45:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 19:45:51,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:45:51,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:45:51,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:45:51,257 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:45:51,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:45:51,257 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-21 19:45:51,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:45:51,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342658819] [2020-08-21 19:45:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:45:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:45:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:45:51,301 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 19:45:51,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342658819] [2020-08-21 19:45:51,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:45:51,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:45:51,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501627645] [2020-08-21 19:45:51,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:45:51,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:45:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:45:51,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:45:51,303 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-21 19:45:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:45:51,328 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-21 19:45:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:45:51,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 19:45:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:45:51,329 INFO L225 Difference]: With dead ends: 856 [2020-08-21 19:45:51,329 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:45:51,332 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 19:45:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:45:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:45:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:45:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:45:51,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-21 19:45:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:45:51,333 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:45:51,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:45:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:45:51,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:45:51,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:45:51,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:45:51,360 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 19:45:51,360 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:51,360 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:45:51,360 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:45:51,360 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,361 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-21 19:45:51,362 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-21 19:45:51,363 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,363 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-21 19:45:51,363 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-21 19:45:51,363 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-21 19:45:51,363 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-21 19:45:51,363 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 19:45:51,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:45:51 BoogieIcfgContainer [2020-08-21 19:45:51,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:45:51,377 INFO L168 Benchmark]: Toolchain (without parser) took 2420.30 ms. Allocated memory was 141.6 MB in the beginning and 233.3 MB in the end (delta: 91.8 MB). Free memory was 105.2 MB in the beginning and 139.8 MB in the end (delta: -34.5 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:51,378 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 19:45:51,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.44 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 94.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:51,379 INFO L168 Benchmark]: Boogie Preprocessor took 110.71 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 94.9 MB in the beginning and 182.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:51,380 INFO L168 Benchmark]: RCFGBuilder took 300.53 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 168.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:51,381 INFO L168 Benchmark]: TraceAbstraction took 1766.32 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 167.5 MB in the beginning and 141.1 MB in the end (delta: 26.4 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. [2020-08-21 19:45:51,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.44 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 94.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.71 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 94.9 MB in the beginning and 182.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.53 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 168.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1766.32 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 167.5 MB in the beginning and 141.1 MB in the end (delta: 26.4 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred 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: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...