/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:58:09,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:58:09,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:58:09,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:58:09,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:58:09,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:58:09,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:58:09,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:58:09,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:58:09,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:58:09,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:58:09,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:58:09,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:58:09,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:58:09,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:58:09,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:58:09,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:58:09,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:58:09,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:58:09,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:58:09,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:58:09,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:58:09,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:58:09,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:58:09,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:58:09,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:58:09,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:58:09,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:58:09,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:58:09,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:58:09,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:58:09,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:58:09,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:58:09,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:58:09,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:58:09,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:58:09,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:58:09,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:58:09,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:58:09,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:58:09,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:58:09,225 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 [2020-08-19 01:58:09,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:58:09,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:58:09,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:58:09,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:58:09,248 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:58:09,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:58:09,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:58:09,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:58:09,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:58:09,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:58:09,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:58:09,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:58:09,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:58:09,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:58:09,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:58:09,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:58:09,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:58:09,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:58:09,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:58:09,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:58:09,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:58:09,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:58:09,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:58:09,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:58:09,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:58:09,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:58:09,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:58:09,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:58:09,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:58:09,253 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:58:09,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:58:09,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:58:09,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:58:09,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:58:09,609 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:58:09,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-19 01:58:09,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce644d93/25562fa865f64e599c9449a4692767d2/FLAGed86372f2 [2020-08-19 01:58:10,169 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:58:10,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-19 01:58:10,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce644d93/25562fa865f64e599c9449a4692767d2/FLAGed86372f2 [2020-08-19 01:58:10,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce644d93/25562fa865f64e599c9449a4692767d2 [2020-08-19 01:58:10,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:58:10,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:58:10,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:10,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:58:10,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:58:10,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e983976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10, skipping insertion in model container [2020-08-19 01:58:10,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:58:10,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:58:10,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:10,780 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:58:10,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:10,833 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:58:10,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10 WrapperNode [2020-08-19 01:58:10,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:10,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:58:10,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:58:10,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:58:10,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (1/1) ... [2020-08-19 01:58:10,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:58:10,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:58:10,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:58:10,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:58:10,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (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 [2020-08-19 01:58:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:58:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:58:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:58:11,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:58:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:58:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:58:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:58:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:58:11,281 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:58:11,282 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:58:11,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:11 BoogieIcfgContainer [2020-08-19 01:58:11,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:58:11,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:58:11,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:58:11,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:58:11,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:58:10" (1/3) ... [2020-08-19 01:58:11,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcca22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:11, skipping insertion in model container [2020-08-19 01:58:11,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:10" (2/3) ... [2020-08-19 01:58:11,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcca22c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:11, skipping insertion in model container [2020-08-19 01:58:11,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:11" (3/3) ... [2020-08-19 01:58:11,295 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-19 01:58:11,313 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:58:11,320 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:58:11,342 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:58:11,383 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:58:11,384 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:58:11,384 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:58:11,384 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:58:11,385 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:58:11,385 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:58:11,385 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:58:11,385 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:58:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-19 01:58:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 01:58:11,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:11,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:11,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-19 01:58:11,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:11,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849708297] [2020-08-19 01:58:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:11,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849708297] [2020-08-19 01:58:11,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:11,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:11,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863827874] [2020-08-19 01:58:11,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:11,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:11,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:11,648 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-19 01:58:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:11,714 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-19 01:58:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:11,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 01:58:11,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:11,727 INFO L225 Difference]: With dead ends: 69 [2020-08-19 01:58:11,727 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 01:58:11,730 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 [2020-08-19 01:58:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 01:58:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-19 01:58:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 01:58:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-19 01:58:11,769 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-19 01:58:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:11,769 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-19 01:58:11,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-19 01:58:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 01:58:11,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:11,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:11,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:58:11,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-19 01:58:11,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:11,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823592399] [2020-08-19 01:58:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:11,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823592399] [2020-08-19 01:58:11,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:11,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:11,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659609314] [2020-08-19 01:58:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:11,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:11,837 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-19 01:58:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:11,862 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-19 01:58:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:11,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 01:58:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:11,865 INFO L225 Difference]: With dead ends: 87 [2020-08-19 01:58:11,865 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 01:58:11,866 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 [2020-08-19 01:58:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 01:58:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-19 01:58:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 01:58:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-19 01:58:11,881 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-19 01:58:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:11,882 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-19 01:58:11,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-19 01:58:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:58:11,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:11,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:11,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:58:11,886 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-19 01:58:11,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:11,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430003356] [2020-08-19 01:58:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:11,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430003356] [2020-08-19 01:58:11,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:11,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:11,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31262803] [2020-08-19 01:58:11,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:11,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:11,946 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-19 01:58:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:11,968 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-19 01:58:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:11,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 01:58:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:11,970 INFO L225 Difference]: With dead ends: 81 [2020-08-19 01:58:11,971 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 01:58:11,972 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 [2020-08-19 01:58:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 01:58:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-19 01:58:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 01:58:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-19 01:58:11,984 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-19 01:58:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:11,985 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-19 01:58:11,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-19 01:58:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:58:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:11,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:11,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:58:11,987 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-19 01:58:11,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:11,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355538993] [2020-08-19 01:58:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355538993] [2020-08-19 01:58:12,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393681031] [2020-08-19 01:58:12,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,036 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-19 01:58:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,058 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-19 01:58:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 01:58:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,061 INFO L225 Difference]: With dead ends: 100 [2020-08-19 01:58:12,061 INFO L226 Difference]: Without dead ends: 98 [2020-08-19 01:58:12,062 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 [2020-08-19 01:58:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-19 01:58:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-19 01:58:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 01:58:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-19 01:58:12,073 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-19 01:58:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,074 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-19 01:58:12,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-19 01:58:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 01:58:12,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:58:12,076 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-19 01:58:12,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295350600] [2020-08-19 01:58:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295350600] [2020-08-19 01:58:12,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635547166] [2020-08-19 01:58:12,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,138 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-19 01:58:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,166 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-19 01:58:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 01:58:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,168 INFO L225 Difference]: With dead ends: 164 [2020-08-19 01:58:12,168 INFO L226 Difference]: Without dead ends: 100 [2020-08-19 01:58:12,169 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 [2020-08-19 01:58:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-19 01:58:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-19 01:58:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-19 01:58:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-19 01:58:12,183 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-19 01:58:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,184 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-19 01:58:12,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-19 01:58:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:58:12,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:58:12,186 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-19 01:58:12,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423334343] [2020-08-19 01:58:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423334343] [2020-08-19 01:58:12,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207164847] [2020-08-19 01:58:12,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,223 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-19 01:58:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,242 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-19 01:58:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 01:58:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,245 INFO L225 Difference]: With dead ends: 147 [2020-08-19 01:58:12,245 INFO L226 Difference]: Without dead ends: 102 [2020-08-19 01:58:12,246 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 [2020-08-19 01:58:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-19 01:58:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-19 01:58:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 01:58:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-19 01:58:12,261 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-19 01:58:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,262 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-19 01:58:12,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-19 01:58:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:58:12,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:58:12,264 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-19 01:58:12,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098021573] [2020-08-19 01:58:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098021573] [2020-08-19 01:58:12,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009981579] [2020-08-19 01:58:12,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,319 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-19 01:58:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,349 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-19 01:58:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 01:58:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,352 INFO L225 Difference]: With dead ends: 180 [2020-08-19 01:58:12,352 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 01:58:12,353 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 [2020-08-19 01:58:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 01:58:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-19 01:58:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 01:58:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-19 01:58:12,368 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-19 01:58:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,369 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-19 01:58:12,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-19 01:58:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 01:58:12,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:58:12,372 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-19 01:58:12,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525203284] [2020-08-19 01:58:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525203284] [2020-08-19 01:58:12,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097408208] [2020-08-19 01:58:12,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,423 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-19 01:58:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,443 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 01:58:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 01:58:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,445 INFO L225 Difference]: With dead ends: 312 [2020-08-19 01:58:12,445 INFO L226 Difference]: Without dead ends: 186 [2020-08-19 01:58:12,446 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 [2020-08-19 01:58:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-19 01:58:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-19 01:58:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 01:58:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-19 01:58:12,461 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-19 01:58:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,461 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-19 01:58:12,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-19 01:58:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:58:12,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:58:12,464 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-19 01:58:12,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652422751] [2020-08-19 01:58:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652422751] [2020-08-19 01:58:12,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219826503] [2020-08-19 01:58:12,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,513 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-19 01:58:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,543 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-19 01:58:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:58:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,545 INFO L225 Difference]: With dead ends: 276 [2020-08-19 01:58:12,545 INFO L226 Difference]: Without dead ends: 190 [2020-08-19 01:58:12,546 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 [2020-08-19 01:58:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-19 01:58:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-19 01:58:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-19 01:58:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-19 01:58:12,559 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-19 01:58:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,559 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-19 01:58:12,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-19 01:58:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:58:12,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:58:12,562 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-19 01:58:12,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221660034] [2020-08-19 01:58:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221660034] [2020-08-19 01:58:12,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962397882] [2020-08-19 01:58:12,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,590 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-19 01:58:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,610 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-19 01:58:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:58:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,613 INFO L225 Difference]: With dead ends: 332 [2020-08-19 01:58:12,613 INFO L226 Difference]: Without dead ends: 330 [2020-08-19 01:58:12,614 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 [2020-08-19 01:58:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-19 01:58:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-19 01:58:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-19 01:58:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-19 01:58:12,628 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-19 01:58:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,628 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-19 01:58:12,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-19 01:58:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:58:12,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:58:12,637 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-19 01:58:12,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120621297] [2020-08-19 01:58:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120621297] [2020-08-19 01:58:12,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375757380] [2020-08-19 01:58:12,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,690 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-19 01:58:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,733 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-19 01:58:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:58:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,737 INFO L225 Difference]: With dead ends: 604 [2020-08-19 01:58:12,738 INFO L226 Difference]: Without dead ends: 354 [2020-08-19 01:58:12,740 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 [2020-08-19 01:58:12,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-19 01:58:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-19 01:58:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-19 01:58:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-19 01:58:12,761 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-19 01:58:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,764 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-19 01:58:12,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-19 01:58:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:58:12,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:58:12,771 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-19 01:58:12,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460465684] [2020-08-19 01:58:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460465684] [2020-08-19 01:58:12,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513724168] [2020-08-19 01:58:12,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,827 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-19 01:58:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,852 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-19 01:58:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:58:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,856 INFO L225 Difference]: With dead ends: 528 [2020-08-19 01:58:12,856 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 01:58:12,857 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 [2020-08-19 01:58:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 01:58:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-19 01:58:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 01:58:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-19 01:58:12,873 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-19 01:58:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,874 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-19 01:58:12,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-19 01:58:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:58:12,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:58:12,879 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-19 01:58:12,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594076851] [2020-08-19 01:58:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:12,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594076851] [2020-08-19 01:58:12,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193018890] [2020-08-19 01:58:12,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,920 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-19 01:58:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,955 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-19 01:58:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:58:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,959 INFO L225 Difference]: With dead ends: 620 [2020-08-19 01:58:12,960 INFO L226 Difference]: Without dead ends: 618 [2020-08-19 01:58:12,960 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 [2020-08-19 01:58:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-19 01:58:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-19 01:58:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-19 01:58:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-19 01:58:12,980 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-19 01:58:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,980 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-19 01:58:12,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,981 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-19 01:58:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:58:12,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:58:12,983 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-19 01:58:12,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507283686] [2020-08-19 01:58:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507283686] [2020-08-19 01:58:13,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887386585] [2020-08-19 01:58:13,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,020 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-19 01:58:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,051 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-19 01:58:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:58:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,055 INFO L225 Difference]: With dead ends: 1180 [2020-08-19 01:58:13,056 INFO L226 Difference]: Without dead ends: 682 [2020-08-19 01:58:13,058 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 [2020-08-19 01:58:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-19 01:58:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-19 01:58:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-19 01:58:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-19 01:58:13,081 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-19 01:58:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,082 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-19 01:58:13,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-19 01:58:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:13,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:58:13,084 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-19 01:58:13,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319639453] [2020-08-19 01:58:13,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319639453] [2020-08-19 01:58:13,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408516578] [2020-08-19 01:58:13,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,120 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-19 01:58:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,149 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-19 01:58:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:58:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,155 INFO L225 Difference]: With dead ends: 1020 [2020-08-19 01:58:13,155 INFO L226 Difference]: Without dead ends: 698 [2020-08-19 01:58:13,158 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 [2020-08-19 01:58:13,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-19 01:58:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-19 01:58:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-19 01:58:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-19 01:58:13,187 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-19 01:58:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,188 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-19 01:58:13,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-19 01:58:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:13,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:58:13,191 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-19 01:58:13,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050410456] [2020-08-19 01:58:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050410456] [2020-08-19 01:58:13,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834024774] [2020-08-19 01:58:13,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,235 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-19 01:58:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,272 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-19 01:58:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:58:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,279 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 01:58:13,279 INFO L226 Difference]: Without dead ends: 1162 [2020-08-19 01:58:13,280 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 [2020-08-19 01:58:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-19 01:58:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-19 01:58:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-19 01:58:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-19 01:58:13,335 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-19 01:58:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,336 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-19 01:58:13,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-19 01:58:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:13,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 01:58:13,339 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-19 01:58:13,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830181441] [2020-08-19 01:58:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830181441] [2020-08-19 01:58:13,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406719328] [2020-08-19 01:58:13,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,358 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-19 01:58:13,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,395 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-19 01:58:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:58:13,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,402 INFO L225 Difference]: With dead ends: 2316 [2020-08-19 01:58:13,402 INFO L226 Difference]: Without dead ends: 1322 [2020-08-19 01:58:13,404 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 [2020-08-19 01:58:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-19 01:58:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-19 01:58:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-19 01:58:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-19 01:58:13,445 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-19 01:58:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,446 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-19 01:58:13,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-19 01:58:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:58:13,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 01:58:13,449 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-19 01:58:13,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454541522] [2020-08-19 01:58:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454541522] [2020-08-19 01:58:13,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624171665] [2020-08-19 01:58:13,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,468 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-19 01:58:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,502 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-19 01:58:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:58:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,508 INFO L225 Difference]: With dead ends: 1980 [2020-08-19 01:58:13,508 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 01:58:13,510 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 [2020-08-19 01:58:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 01:58:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-19 01:58:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-19 01:58:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-19 01:58:13,552 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-19 01:58:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,552 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-19 01:58:13,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-19 01:58:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:58:13,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 01:58:13,555 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-19 01:58:13,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702624455] [2020-08-19 01:58:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702624455] [2020-08-19 01:58:13,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527301154] [2020-08-19 01:58:13,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,574 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-19 01:58:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,617 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-19 01:58:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:58:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,627 INFO L225 Difference]: With dead ends: 2186 [2020-08-19 01:58:13,627 INFO L226 Difference]: Without dead ends: 2184 [2020-08-19 01:58:13,628 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 [2020-08-19 01:58:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-19 01:58:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-19 01:58:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-19 01:58:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-19 01:58:13,684 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-19 01:58:13,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,684 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-19 01:58:13,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-19 01:58:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:58:13,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 01:58:13,689 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-19 01:58:13,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283878136] [2020-08-19 01:58:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:58:13,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283878136] [2020-08-19 01:58:13,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389434997] [2020-08-19 01:58:13,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,713 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-19 01:58:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,776 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-19 01:58:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:58:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,794 INFO L225 Difference]: With dead ends: 4552 [2020-08-19 01:58:13,794 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:58:13,801 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 [2020-08-19 01:58:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:58:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:58:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:58:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:58:13,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-19 01:58:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,803 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:58:13,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:58:13,803 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:58:13,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 01:58:13,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:58:13,827 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:58:13,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:58:13,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:58:13,828 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:58:13,828 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:58:13,828 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:58:13,828 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-19 01:58:13,828 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-19 01:58:13,828 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,828 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-19 01:58:13,828 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-19 01:58:13,828 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-19 01:58:13,829 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-19 01:58:13,829 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-19 01:58:13,829 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,829 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-19 01:58:13,829 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,829 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,829 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-19 01:58:13,829 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-19 01:58:13,830 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,831 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-19 01:58:13,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:58:13 BoogieIcfgContainer [2020-08-19 01:58:13,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:58:13,846 INFO L168 Benchmark]: Toolchain (without parser) took 3302.78 ms. Allocated memory was 140.5 MB in the beginning and 246.4 MB in the end (delta: 105.9 MB). Free memory was 103.8 MB in the beginning and 208.4 MB in the end (delta: -104.7 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:13,846 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 01:58:13,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.21 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:13,848 INFO L168 Benchmark]: Boogie Preprocessor took 120.29 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:13,848 INFO L168 Benchmark]: RCFGBuilder took 329.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 164.4 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:13,849 INFO L168 Benchmark]: TraceAbstraction took 2554.52 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 164.4 MB in the beginning and 208.4 MB in the end (delta: -44.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:58:13,852 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.21 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.29 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 181.0 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 164.4 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2554.52 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 164.4 MB in the beginning and 208.4 MB in the end (delta: -44.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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: 30]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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...