/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:54:20,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:54:20,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:54:20,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 17:54:20,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:54:20,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:54:20,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:54:20,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:54:20,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:54:20,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:54:20,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:54:20,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:54:20,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:54:20,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:54:20,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:54:20,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:54:20,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:54:20,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:54:20,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:54:20,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:54:20,977 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 [2020-08-18 17:54:20,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:54:20,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:54:21,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:54:21,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:54:21,000 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:54:21,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:54:21,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:54:21,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:54:21,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:54:21,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:54:21,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:54:21,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:54:21,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:54:21,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:54:21,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:54:21,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:54:21,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:54:21,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:54:21,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:54:21,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:54:21,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:54:21,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:54:21,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:54:21,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:54:21,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:54:21,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:54:21,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:54:21,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:54:21,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:54:21,005 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:54:21,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:54:21,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:54:21,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:54:21,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:54:21,341 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:54:21,341 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 17:54:21,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4145b947c/15b96911e45a4c348d51a02f60c7a51c/FLAGec5df3e9e [2020-08-18 17:54:21,862 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:54:21,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-18 17:54:21,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4145b947c/15b96911e45a4c348d51a02f60c7a51c/FLAGec5df3e9e [2020-08-18 17:54:22,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4145b947c/15b96911e45a4c348d51a02f60c7a51c [2020-08-18 17:54:22,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:54:22,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:54:22,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:54:22,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:54:22,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:54:22,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cfd66c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22, skipping insertion in model container [2020-08-18 17:54:22,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:54:22,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:54:22,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:54:22,468 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:54:22,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:54:22,598 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:54:22,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22 WrapperNode [2020-08-18 17:54:22,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:54:22,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:54:22,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:54:22,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:54:22,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (1/1) ... [2020-08-18 17:54:22,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:54:22,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:54:22,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:54:22,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:54:22,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (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 [2020-08-18 17:54:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:54:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:54:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-18 17:54:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:54:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:54:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:54:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:54:22,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:54:22,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:54:22,982 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 17:54:22,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:54:22 BoogieIcfgContainer [2020-08-18 17:54:22,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:54:22,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:54:22,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:54:23,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:54:23,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:54:22" (1/3) ... [2020-08-18 17:54:23,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420635bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:54:23, skipping insertion in model container [2020-08-18 17:54:23,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:54:22" (2/3) ... [2020-08-18 17:54:23,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420635bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:54:23, skipping insertion in model container [2020-08-18 17:54:23,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:54:22" (3/3) ... [2020-08-18 17:54:23,013 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-18 17:54:23,036 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:54:23,053 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:54:23,067 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:54:23,086 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:54:23,087 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:54:23,087 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:54:23,087 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:54:23,087 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:54:23,087 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:54:23,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:54:23,088 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:54:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-18 17:54:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:54:23,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:23,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:23,113 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-08-18 17:54:23,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:23,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066845280] [2020-08-18 17:54:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 17:54:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:23,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066845280] [2020-08-18 17:54:23,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:23,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:54:23,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62093323] [2020-08-18 17:54:23,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:54:23,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:54:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:54:23,328 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-18 17:54:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:23,430 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-18 17:54:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:54:23,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:54:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:23,443 INFO L225 Difference]: With dead ends: 42 [2020-08-18 17:54:23,443 INFO L226 Difference]: Without dead ends: 20 [2020-08-18 17:54:23,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:54:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-18 17:54:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-18 17:54:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 17:54:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 17:54:23,481 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-08-18 17:54:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:23,482 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 17:54:23,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:54:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 17:54:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:54:23,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:23,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:23,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:54:23,484 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-08-18 17:54:23,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:23,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874762818] [2020-08-18 17:54:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 17:54:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:23,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874762818] [2020-08-18 17:54:23,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:54:23,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:54:23,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646849149] [2020-08-18 17:54:23,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:54:23,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:54:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:23,603 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-08-18 17:54:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:23,678 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-18 17:54:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:54:23,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 17:54:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:23,680 INFO L225 Difference]: With dead ends: 34 [2020-08-18 17:54:23,680 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 17:54:23,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:54:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 17:54:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 17:54:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:54:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 17:54:23,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-08-18 17:54:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:23,689 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 17:54:23,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:54:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 17:54:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:54:23,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:23,691 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] [2020-08-18 17:54:23,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:54:23,691 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-08-18 17:54:23,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:23,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634398623] [2020-08-18 17:54:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 17:54:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:23,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634398623] [2020-08-18 17:54:23,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:23,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:54:23,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997285306] [2020-08-18 17:54:23,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:54:23,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:54:23,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:23,789 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-18 17:54:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:23,855 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-08-18 17:54:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:54:23,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 17:54:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:23,857 INFO L225 Difference]: With dead ends: 36 [2020-08-18 17:54:23,857 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 17:54:23,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:54:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 17:54:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 17:54:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 17:54:23,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-18 17:54:23,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-08-18 17:54:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:23,864 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-18 17:54:23,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:54:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-18 17:54:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:54:23,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:23,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:23,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:54:23,866 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-08-18 17:54:23,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:23,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990716715] [2020-08-18 17:54:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 17:54:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:23,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990716715] [2020-08-18 17:54:23,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:23,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:54:23,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958752878] [2020-08-18 17:54:23,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:54:23,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:23,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:54:23,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:54:23,993 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-18 17:54:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:24,099 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-18 17:54:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:54:24,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-18 17:54:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:24,101 INFO L225 Difference]: With dead ends: 38 [2020-08-18 17:54:24,101 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 17:54:24,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:54:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 17:54:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-18 17:54:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 17:54:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-18 17:54:24,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-08-18 17:54:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:24,114 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-18 17:54:24,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:54:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-18 17:54:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:54:24,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:24,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:24,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:54:24,119 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-08-18 17:54:24,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:24,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673641665] [2020-08-18 17:54:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 17:54:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:24,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673641665] [2020-08-18 17:54:24,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:24,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:54:24,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818081728] [2020-08-18 17:54:24,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:54:24,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:54:24,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:54:24,259 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-08-18 17:54:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:24,327 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-08-18 17:54:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:54:24,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-18 17:54:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:24,329 INFO L225 Difference]: With dead ends: 40 [2020-08-18 17:54:24,329 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 17:54:24,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:54:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 17:54:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-18 17:54:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 17:54:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 17:54:24,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-08-18 17:54:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:24,336 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 17:54:24,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:54:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 17:54:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:54:24,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:24,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:24,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:54:24,338 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-08-18 17:54:24,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:24,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583953376] [2020-08-18 17:54:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:54:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:24,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583953376] [2020-08-18 17:54:24,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:24,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:54:24,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100177534] [2020-08-18 17:54:24,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:54:24,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:24,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:54:24,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:54:24,466 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-08-18 17:54:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:24,538 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-18 17:54:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:54:24,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-18 17:54:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:24,539 INFO L225 Difference]: With dead ends: 42 [2020-08-18 17:54:24,539 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 17:54:24,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:54:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 17:54:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 17:54:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 17:54:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-18 17:54:24,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-08-18 17:54:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:24,546 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-18 17:54:24,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:54:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-18 17:54:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:54:24,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:24,548 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:24,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:54:24,548 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-08-18 17:54:24,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:24,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106323722] [2020-08-18 17:54:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 17:54:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:24,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106323722] [2020-08-18 17:54:24,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:24,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:54:24,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636865809] [2020-08-18 17:54:24,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:54:24,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:24,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:54:24,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:54:24,657 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-18 17:54:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:24,746 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-08-18 17:54:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:54:24,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-18 17:54:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:24,748 INFO L225 Difference]: With dead ends: 44 [2020-08-18 17:54:24,748 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 17:54:24,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:54:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 17:54:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-18 17:54:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 17:54:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-08-18 17:54:24,762 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-08-18 17:54:24,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:24,762 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-08-18 17:54:24,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:54:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-08-18 17:54:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:54:24,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:24,768 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:24,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:54:24,768 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-08-18 17:54:24,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:24,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709354046] [2020-08-18 17:54:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 17:54:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:24,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709354046] [2020-08-18 17:54:24,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:24,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:54:24,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454384840] [2020-08-18 17:54:24,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:54:24,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:54:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:54:24,898 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-08-18 17:54:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:24,967 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-08-18 17:54:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:54:24,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-18 17:54:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:24,968 INFO L225 Difference]: With dead ends: 46 [2020-08-18 17:54:24,968 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 17:54:24,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:54:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 17:54:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-18 17:54:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 17:54:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 17:54:24,975 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-08-18 17:54:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:24,975 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 17:54:24,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:54:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 17:54:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 17:54:24,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:24,976 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:24,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:54:24,977 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-08-18 17:54:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:24,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755156720] [2020-08-18 17:54:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:54:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:25,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755156720] [2020-08-18 17:54:25,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:25,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:54:25,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531184348] [2020-08-18 17:54:25,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:54:25,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:54:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:54:25,094 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 17:54:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:25,209 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-18 17:54:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:54:25,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-18 17:54:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:25,211 INFO L225 Difference]: With dead ends: 48 [2020-08-18 17:54:25,211 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 17:54:25,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:54:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 17:54:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-18 17:54:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 17:54:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-18 17:54:25,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-08-18 17:54:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:25,228 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-18 17:54:25,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:54:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-18 17:54:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:54:25,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:25,230 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:25,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:54:25,233 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-08-18 17:54:25,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:25,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651454860] [2020-08-18 17:54:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 17:54:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:25,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651454860] [2020-08-18 17:54:25,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:25,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:54:25,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061975033] [2020-08-18 17:54:25,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:54:25,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:54:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:54:25,408 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-08-18 17:54:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:25,493 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-18 17:54:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:54:25,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-18 17:54:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:25,495 INFO L225 Difference]: With dead ends: 50 [2020-08-18 17:54:25,495 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 17:54:25,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:54:25,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 17:54:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-18 17:54:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-18 17:54:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-18 17:54:25,501 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-08-18 17:54:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:25,501 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-18 17:54:25,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:54:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-18 17:54:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 17:54:25,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:25,502 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:25,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:54:25,503 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-08-18 17:54:25,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:25,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830111012] [2020-08-18 17:54:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 17:54:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:25,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830111012] [2020-08-18 17:54:25,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:25,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:54:25,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693067347] [2020-08-18 17:54:25,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:54:25,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:54:25,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:54:25,630 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-08-18 17:54:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:25,710 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-08-18 17:54:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:54:25,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-18 17:54:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:25,711 INFO L225 Difference]: With dead ends: 52 [2020-08-18 17:54:25,711 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 17:54:25,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:54:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 17:54:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-18 17:54:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 17:54:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 17:54:25,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-08-18 17:54:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:25,718 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 17:54:25,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:54:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 17:54:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 17:54:25,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:25,719 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:25,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:54:25,719 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-08-18 17:54:25,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:25,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527944543] [2020-08-18 17:54:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 17:54:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:25,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527944543] [2020-08-18 17:54:25,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:25,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:54:25,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677686813] [2020-08-18 17:54:25,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:54:25,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:54:25,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:54:25,857 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-08-18 17:54:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:25,949 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-18 17:54:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:54:25,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-18 17:54:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:25,950 INFO L225 Difference]: With dead ends: 54 [2020-08-18 17:54:25,950 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 17:54:25,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:54:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 17:54:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-18 17:54:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 17:54:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-08-18 17:54:25,956 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-08-18 17:54:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:25,957 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-08-18 17:54:25,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:54:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-08-18 17:54:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 17:54:25,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:25,958 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:25,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:54:25,958 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-08-18 17:54:25,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:25,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646653692] [2020-08-18 17:54:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:54:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:26,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646653692] [2020-08-18 17:54:26,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:26,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:54:26,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108517387] [2020-08-18 17:54:26,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:54:26,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:54:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:54:26,116 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-08-18 17:54:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:26,230 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-08-18 17:54:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:54:26,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-18 17:54:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:26,231 INFO L225 Difference]: With dead ends: 56 [2020-08-18 17:54:26,231 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 17:54:26,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:54:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 17:54:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-18 17:54:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 17:54:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-18 17:54:26,245 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-08-18 17:54:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:26,246 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-18 17:54:26,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:54:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-18 17:54:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 17:54:26,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:26,247 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:26,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:54:26,247 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-08-18 17:54:26,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:26,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448501791] [2020-08-18 17:54:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:54:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:26,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448501791] [2020-08-18 17:54:26,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:26,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 17:54:26,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853929996] [2020-08-18 17:54:26,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 17:54:26,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:26,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 17:54:26,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:54:26,446 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-08-18 17:54:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:26,539 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-18 17:54:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:54:26,540 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-08-18 17:54:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:26,541 INFO L225 Difference]: With dead ends: 58 [2020-08-18 17:54:26,541 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:54:26,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:54:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:54:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-18 17:54:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 17:54:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 17:54:26,551 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-08-18 17:54:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:26,551 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 17:54:26,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 17:54:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 17:54:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-18 17:54:26,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:26,555 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:26,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:54:26,556 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-08-18 17:54:26,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:26,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881443232] [2020-08-18 17:54:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:54:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:26,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881443232] [2020-08-18 17:54:26,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:26,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:54:26,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529725344] [2020-08-18 17:54:26,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:54:26,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:54:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:54:26,790 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-18 17:54:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:26,890 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-18 17:54:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:54:26,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-18 17:54:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:26,891 INFO L225 Difference]: With dead ends: 60 [2020-08-18 17:54:26,892 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 17:54:26,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:54:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 17:54:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-08-18 17:54:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-18 17:54:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-08-18 17:54:26,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-08-18 17:54:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:26,902 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-08-18 17:54:26,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:54:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-08-18 17:54:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 17:54:26,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:26,906 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:26,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:54:26,907 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-08-18 17:54:26,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:26,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359449362] [2020-08-18 17:54:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:54:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:27,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359449362] [2020-08-18 17:54:27,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:27,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 17:54:27,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80309305] [2020-08-18 17:54:27,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 17:54:27,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:27,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 17:54:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:54:27,140 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-08-18 17:54:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:27,235 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-08-18 17:54:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:54:27,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-08-18 17:54:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:27,236 INFO L225 Difference]: With dead ends: 62 [2020-08-18 17:54:27,237 INFO L226 Difference]: Without dead ends: 50 [2020-08-18 17:54:27,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:54:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-18 17:54:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-08-18 17:54:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 17:54:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-08-18 17:54:27,250 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-08-18 17:54:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:27,251 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-08-18 17:54:27,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 17:54:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-08-18 17:54:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 17:54:27,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:27,255 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:27,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:54:27,256 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-08-18 17:54:27,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:27,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577785579] [2020-08-18 17:54:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 17:54:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:27,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577785579] [2020-08-18 17:54:27,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:27,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:54:27,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269352046] [2020-08-18 17:54:27,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:54:27,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:54:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:54:27,504 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-08-18 17:54:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:27,592 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-08-18 17:54:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:54:27,593 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-08-18 17:54:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:27,593 INFO L225 Difference]: With dead ends: 64 [2020-08-18 17:54:27,594 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 17:54:27,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:54:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 17:54:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-18 17:54:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 17:54:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-18 17:54:27,600 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-08-18 17:54:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:27,601 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-18 17:54:27,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:54:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-18 17:54:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 17:54:27,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:27,602 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:27,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:54:27,603 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-08-18 17:54:27,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:27,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123019565] [2020-08-18 17:54:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:54:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:27,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123019565] [2020-08-18 17:54:27,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:27,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 17:54:27,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739970475] [2020-08-18 17:54:27,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 17:54:27,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:27,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 17:54:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:54:27,918 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-08-18 17:54:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:28,081 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-18 17:54:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:54:28,082 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-08-18 17:54:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:28,082 INFO L225 Difference]: With dead ends: 66 [2020-08-18 17:54:28,082 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 17:54:28,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:54:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 17:54:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-18 17:54:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-18 17:54:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-18 17:54:28,098 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-08-18 17:54:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:28,099 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-18 17:54:28,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 17:54:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-18 17:54:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 17:54:28,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:28,103 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:28,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:54:28,104 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-08-18 17:54:28,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:28,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109667218] [2020-08-18 17:54:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 17:54:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:28,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109667218] [2020-08-18 17:54:28,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:28,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:54:28,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066535303] [2020-08-18 17:54:28,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:54:28,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:28,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:54:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:54:28,410 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-08-18 17:54:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:28,522 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-08-18 17:54:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:54:28,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-08-18 17:54:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:28,523 INFO L225 Difference]: With dead ends: 68 [2020-08-18 17:54:28,523 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 17:54:28,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:54:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 17:54:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-18 17:54:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 17:54:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-08-18 17:54:28,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-08-18 17:54:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:28,529 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-08-18 17:54:28,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:54:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-08-18 17:54:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 17:54:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:28,531 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:28,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:54:28,531 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-08-18 17:54:28,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:28,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200172689] [2020-08-18 17:54:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:28,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:28,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 17:54:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:28,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200172689] [2020-08-18 17:54:28,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:28,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 17:54:28,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455686365] [2020-08-18 17:54:28,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 17:54:28,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 17:54:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:54:28,831 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-08-18 17:54:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:28,926 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-08-18 17:54:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:54:28,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-08-18 17:54:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:28,927 INFO L225 Difference]: With dead ends: 70 [2020-08-18 17:54:28,927 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 17:54:28,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:54:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 17:54:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-18 17:54:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 17:54:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-18 17:54:28,933 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-08-18 17:54:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:28,935 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-18 17:54:28,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 17:54:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-18 17:54:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 17:54:28,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:28,936 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:28,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:54:28,937 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-08-18 17:54:28,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:28,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009995537] [2020-08-18 17:54:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:29,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:54:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:29,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:54:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:54:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:54:29,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009995537] [2020-08-18 17:54:29,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:54:29,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 17:54:29,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891636349] [2020-08-18 17:54:29,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 17:54:29,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:54:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 17:54:29,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:54:29,253 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-08-18 17:54:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:54:29,375 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-08-18 17:54:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 17:54:29,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-08-18 17:54:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:54:29,376 INFO L225 Difference]: With dead ends: 71 [2020-08-18 17:54:29,376 INFO L226 Difference]: Without dead ends: 59 [2020-08-18 17:54:29,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:54:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-18 17:54:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-18 17:54:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 17:54:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-08-18 17:54:29,384 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-08-18 17:54:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:54:29,384 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-08-18 17:54:29,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 17:54:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-08-18 17:54:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:54:29,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:54:29,385 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:54:29,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:54:29,385 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:54:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:54:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-08-18 17:54:29,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:54:29,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108370135] [2020-08-18 17:54:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:54:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:54:29,531 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:54:29,531 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:54:29,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:54:29,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:54:29 BoogieIcfgContainer [2020-08-18 17:54:29,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:54:29,579 INFO L168 Benchmark]: Toolchain (without parser) took 7349.39 ms. Allocated memory was 141.0 MB in the beginning and 305.1 MB in the end (delta: 164.1 MB). Free memory was 102.1 MB in the beginning and 188.0 MB in the end (delta: -85.9 MB). Peak memory consumption was 78.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:29,584 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 17:54:29,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.78 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 101.9 MB in the beginning and 182.3 MB in the end (delta: -80.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:29,586 INFO L168 Benchmark]: Boogie Preprocessor took 42.97 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 179.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:29,587 INFO L168 Benchmark]: RCFGBuilder took 351.03 ms. Allocated memory is still 203.4 MB. Free memory was 179.6 MB in the beginning and 164.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:29,587 INFO L168 Benchmark]: TraceAbstraction took 6571.08 ms. Allocated memory was 203.4 MB in the beginning and 305.1 MB in the end (delta: 101.7 MB). Free memory was 164.1 MB in the beginning and 188.0 MB in the end (delta: -23.9 MB). Peak memory consumption was 77.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:54:29,592 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.0 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 374.78 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 101.9 MB in the beginning and 182.3 MB in the end (delta: -80.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.97 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 179.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.03 ms. Allocated memory is still 203.4 MB. Free memory was 179.6 MB in the beginning and 164.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6571.08 ms. Allocated memory was 203.4 MB in the beginning and 305.1 MB in the end (delta: 101.7 MB). Free memory was 164.1 MB in the beginning and 188.0 MB in the end (delta: -23.9 MB). Peak memory consumption was 77.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...