/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:39:48,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:39:48,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:39:48,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:39:48,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:39:48,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:39:48,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:39:48,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:39:48,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:39:48,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:39:48,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:39:48,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:39:48,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:39:48,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:39:48,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:39:48,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:39:49,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:39:49,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:39:49,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:39:49,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:39:49,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:39:49,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:39:49,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:39:49,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:39:49,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:39:49,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:39:49,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:39:49,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:39:49,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:39:49,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:39:49,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:39:49,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:39:49,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:39:49,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:39:49,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:39:49,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:39:49,053 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:39:49,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:39:49,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:39:49,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:39:49,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:39:49,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:39:49,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:39:49,055 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:39:49,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:39:49,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:39:49,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:39:49,513 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:39:49,513 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:39:49,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-11-07 06:39:49,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f06a7d81/e57cee9ee747416f868b4ba68a716be6/FLAG3b3e720a6 [2020-11-07 06:39:50,198 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:39:50,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-11-07 06:39:50,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f06a7d81/e57cee9ee747416f868b4ba68a716be6/FLAG3b3e720a6 [2020-11-07 06:39:50,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f06a7d81/e57cee9ee747416f868b4ba68a716be6 [2020-11-07 06:39:50,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:39:50,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:39:50,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:39:50,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:39:50,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:39:50,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9aca8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50, skipping insertion in model container [2020-11-07 06:39:50,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:39:50,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:39:50,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:39:50,904 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:39:50,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:39:50,948 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:39:50,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50 WrapperNode [2020-11-07 06:39:50,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:39:50,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:39:50,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:39:50,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:39:50,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... [2020-11-07 06:39:50,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:39:50,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:39:50,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:39:50,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:39:50,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-07 06:39:51,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:39:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:39:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:39:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:39:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:39:51,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:39:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:39:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:39:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:39:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:39:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:39:51,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:39:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:39:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:39:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:39:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:39:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:39:51,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:39:51,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:39:51,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:39:51,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:39:51,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:39:51,429 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:39:51,429 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:39:51,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:39:51 BoogieIcfgContainer [2020-11-07 06:39:51,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:39:51,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:39:51,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:39:51,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:39:51,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:39:50" (1/3) ... [2020-11-07 06:39:51,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327c6637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:39:51, skipping insertion in model container [2020-11-07 06:39:51,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:39:50" (2/3) ... [2020-11-07 06:39:51,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327c6637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:39:51, skipping insertion in model container [2020-11-07 06:39:51,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:39:51" (3/3) ... [2020-11-07 06:39:51,442 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-11-07 06:39:51,460 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:39:51,464 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:39:51,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:39:51,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:39:51,504 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:39:51,504 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:39:51,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:39:51,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:39:51,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:39:51,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:39:51,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:39:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-11-07 06:39:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 06:39:51,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:51,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:51,545 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1985075637, now seen corresponding path program 1 times [2020-11-07 06:39:51,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:51,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562114243] [2020-11-07 06:39:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:52,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562114243] [2020-11-07 06:39:52,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:39:52,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 06:39:52,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645107617] [2020-11-07 06:39:52,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:39:52,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:39:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:39:52,152 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 10 states. [2020-11-07 06:39:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:52,761 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-11-07 06:39:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 06:39:52,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-11-07 06:39:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:52,773 INFO L225 Difference]: With dead ends: 85 [2020-11-07 06:39:52,773 INFO L226 Difference]: Without dead ends: 49 [2020-11-07 06:39:52,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:39:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-07 06:39:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-11-07 06:39:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-07 06:39:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-11-07 06:39:52,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 29 [2020-11-07 06:39:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:52,831 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-11-07 06:39:52,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:39:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-11-07 06:39:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:39:52,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:52,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:52,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:39:52,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:52,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1454609912, now seen corresponding path program 1 times [2020-11-07 06:39:52,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:52,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369127253] [2020-11-07 06:39:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:53,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:53,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369127253] [2020-11-07 06:39:53,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:53,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:39:53,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289174629] [2020-11-07 06:39:53,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:39:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:53,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:39:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:39:53,195 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 13 states. [2020-11-07 06:39:53,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:53,860 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-11-07 06:39:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 06:39:53,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-07 06:39:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:53,863 INFO L225 Difference]: With dead ends: 64 [2020-11-07 06:39:53,863 INFO L226 Difference]: Without dead ends: 57 [2020-11-07 06:39:53,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:39:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-07 06:39:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-11-07 06:39:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 06:39:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-11-07 06:39:53,879 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2020-11-07 06:39:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:53,880 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-11-07 06:39:53,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:39:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-11-07 06:39:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:39:53,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:53,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:53,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:39:53,882 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:53,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:53,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1661043528, now seen corresponding path program 1 times [2020-11-07 06:39:53,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:53,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935906903] [2020-11-07 06:39:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:54,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:54,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935906903] [2020-11-07 06:39:54,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:54,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:39:54,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997885802] [2020-11-07 06:39:54,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:39:54,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:39:54,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:39:54,175 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 13 states. [2020-11-07 06:39:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:54,759 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2020-11-07 06:39:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 06:39:54,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-07 06:39:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:54,762 INFO L225 Difference]: With dead ends: 65 [2020-11-07 06:39:54,762 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 06:39:54,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:39:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 06:39:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-11-07 06:39:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-07 06:39:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-11-07 06:39:54,778 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 36 [2020-11-07 06:39:54,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:54,778 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-11-07 06:39:54,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:39:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-11-07 06:39:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 06:39:54,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:54,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:54,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:39:54,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1615947349, now seen corresponding path program 2 times [2020-11-07 06:39:54,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:54,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764119912] [2020-11-07 06:39:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:55,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764119912] [2020-11-07 06:39:55,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:55,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:39:55,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279592763] [2020-11-07 06:39:55,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:39:55,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:39:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:39:55,100 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 16 states. [2020-11-07 06:39:56,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:56,248 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-11-07 06:39:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:39:56,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-11-07 06:39:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:56,251 INFO L225 Difference]: With dead ends: 75 [2020-11-07 06:39:56,252 INFO L226 Difference]: Without dead ends: 68 [2020-11-07 06:39:56,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:39:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-07 06:39:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-11-07 06:39:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-07 06:39:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-07 06:39:56,291 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 43 [2020-11-07 06:39:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:56,291 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-07 06:39:56,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:39:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-07 06:39:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 06:39:56,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:56,293 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:56,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:39:56,294 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash -436633493, now seen corresponding path program 1 times [2020-11-07 06:39:56,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:56,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652540985] [2020-11-07 06:39:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:56,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:56,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652540985] [2020-11-07 06:39:56,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:56,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:39:56,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790656284] [2020-11-07 06:39:56,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:39:56,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:39:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:39:56,600 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 16 states. [2020-11-07 06:39:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:57,609 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-11-07 06:39:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 06:39:57,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-11-07 06:39:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:57,611 INFO L225 Difference]: With dead ends: 77 [2020-11-07 06:39:57,611 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 06:39:57,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:39:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 06:39:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-11-07 06:39:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-07 06:39:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-07 06:39:57,630 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 43 [2020-11-07 06:39:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:57,630 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-07 06:39:57,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:39:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-07 06:39:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 06:39:57,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:57,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:57,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:39:57,633 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash -917071125, now seen corresponding path program 2 times [2020-11-07 06:39:57,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:57,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680429692] [2020-11-07 06:39:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:57,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:57,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680429692] [2020-11-07 06:39:57,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:57,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:39:57,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073063770] [2020-11-07 06:39:57,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:39:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:39:57,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:39:57,962 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 16 states. [2020-11-07 06:39:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:58,844 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-11-07 06:39:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 06:39:58,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-11-07 06:39:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:58,847 INFO L225 Difference]: With dead ends: 85 [2020-11-07 06:39:58,849 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 06:39:58,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:39:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 06:39:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-11-07 06:39:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 06:39:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-11-07 06:39:58,886 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 43 [2020-11-07 06:39:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:58,889 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-11-07 06:39:58,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:39:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-11-07 06:39:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 06:39:58,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:58,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:39:58,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:39:58,891 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash 262242731, now seen corresponding path program 2 times [2020-11-07 06:39:58,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730128660] [2020-11-07 06:39:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:39:59,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730128660] [2020-11-07 06:39:59,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:59,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:39:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295228874] [2020-11-07 06:39:59,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:39:59,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:39:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:39:59,235 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 16 states. [2020-11-07 06:40:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:00,140 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-11-07 06:40:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:40:00,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-11-07 06:40:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:00,143 INFO L225 Difference]: With dead ends: 85 [2020-11-07 06:40:00,144 INFO L226 Difference]: Without dead ends: 78 [2020-11-07 06:40:00,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2020-11-07 06:40:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-07 06:40:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2020-11-07 06:40:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-07 06:40:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-11-07 06:40:00,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 43 [2020-11-07 06:40:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:00,176 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-11-07 06:40:00,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:40:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-11-07 06:40:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:40:00,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:00,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:00,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:40:00,186 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:00,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1672702312, now seen corresponding path program 3 times [2020-11-07 06:40:00,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:00,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480529937] [2020-11-07 06:40:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:00,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:40:00,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480529937] [2020-11-07 06:40:00,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:00,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:40:00,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222642821] [2020-11-07 06:40:00,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:40:00,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:00,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:40:00,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:40:00,605 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 18 states. [2020-11-07 06:40:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:01,585 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-11-07 06:40:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:40:01,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-11-07 06:40:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:01,587 INFO L225 Difference]: With dead ends: 89 [2020-11-07 06:40:01,587 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 06:40:01,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:40:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 06:40:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-11-07 06:40:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-07 06:40:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-11-07 06:40:01,609 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 50 [2020-11-07 06:40:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:01,610 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-11-07 06:40:01,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:40:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-11-07 06:40:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:40:01,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:01,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:01,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:40:01,612 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash -493388456, now seen corresponding path program 3 times [2020-11-07 06:40:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:01,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939884872] [2020-11-07 06:40:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:01,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:40:01,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939884872] [2020-11-07 06:40:01,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:01,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:40:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179616151] [2020-11-07 06:40:01,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:40:01,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:40:01,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:40:01,961 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 18 states. [2020-11-07 06:40:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:03,115 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-11-07 06:40:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:40:03,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-11-07 06:40:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:03,117 INFO L225 Difference]: With dead ends: 94 [2020-11-07 06:40:03,117 INFO L226 Difference]: Without dead ends: 87 [2020-11-07 06:40:03,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:40:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-07 06:40:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-11-07 06:40:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 06:40:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-11-07 06:40:03,136 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 50 [2020-11-07 06:40:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:03,137 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-11-07 06:40:03,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:40:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-11-07 06:40:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:40:03,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:03,138 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:03,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:40:03,138 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:03,139 INFO L82 PathProgramCache]: Analyzing trace with hash -973826088, now seen corresponding path program 4 times [2020-11-07 06:40:03,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:03,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536718837] [2020-11-07 06:40:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:40:03,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536718837] [2020-11-07 06:40:03,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:03,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:40:03,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279983755] [2020-11-07 06:40:03,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:40:03,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:40:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:40:03,486 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 18 states. [2020-11-07 06:40:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:04,695 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-11-07 06:40:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:40:04,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-11-07 06:40:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:04,697 INFO L225 Difference]: With dead ends: 115 [2020-11-07 06:40:04,697 INFO L226 Difference]: Without dead ends: 107 [2020-11-07 06:40:04,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:40:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-07 06:40:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2020-11-07 06:40:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-07 06:40:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-11-07 06:40:04,718 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 50 [2020-11-07 06:40:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:04,718 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-11-07 06:40:04,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:40:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-11-07 06:40:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:40:04,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:04,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:04,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:40:04,720 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1625510568, now seen corresponding path program 5 times [2020-11-07 06:40:04,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:04,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117762912] [2020-11-07 06:40:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:05,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:40:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117762912] [2020-11-07 06:40:05,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:05,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:40:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051114493] [2020-11-07 06:40:05,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:40:05,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:40:05,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:40:05,083 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 18 states. [2020-11-07 06:40:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:06,110 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-11-07 06:40:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:40:06,111 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-11-07 06:40:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:06,112 INFO L225 Difference]: With dead ends: 103 [2020-11-07 06:40:06,113 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 06:40:06,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 06:40:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 06:40:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2020-11-07 06:40:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-07 06:40:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-11-07 06:40:06,139 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 50 [2020-11-07 06:40:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:06,139 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-11-07 06:40:06,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:40:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-11-07 06:40:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 06:40:06,140 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:06,140 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:06,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:40:06,141 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -446196712, now seen corresponding path program 6 times [2020-11-07 06:40:06,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:06,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250456664] [2020-11-07 06:40:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:40:06,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250456664] [2020-11-07 06:40:06,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:06,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:40:06,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908007989] [2020-11-07 06:40:06,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:40:06,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:40:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:40:06,481 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 18 states. [2020-11-07 06:40:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:07,632 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2020-11-07 06:40:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 06:40:07,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-11-07 06:40:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:07,634 INFO L225 Difference]: With dead ends: 116 [2020-11-07 06:40:07,634 INFO L226 Difference]: Without dead ends: 109 [2020-11-07 06:40:07,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 06:40:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-07 06:40:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-11-07 06:40:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-07 06:40:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-11-07 06:40:07,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 50 [2020-11-07 06:40:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:07,654 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-11-07 06:40:07,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:40:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-11-07 06:40:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 06:40:07,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:07,655 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:40:07,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:40:07,655 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1571183029, now seen corresponding path program 7 times [2020-11-07 06:40:07,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:07,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197645167] [2020-11-07 06:40:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:07,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-07 06:40:07,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197645167] [2020-11-07 06:40:07,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:07,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-07 06:40:07,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857330222] [2020-11-07 06:40:07,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 06:40:07,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:07,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 06:40:07,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:40:07,993 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 19 states. [2020-11-07 06:40:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:08,982 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-07 06:40:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:40:08,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-11-07 06:40:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:08,983 INFO L225 Difference]: With dead ends: 74 [2020-11-07 06:40:08,983 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:40:08,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:40:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:40:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:40:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:40:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:40:08,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-11-07 06:40:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:08,986 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:40:08,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 06:40:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:40:08,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:40:08,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:40:08,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:40:09,230 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 66 [2020-11-07 06:40:09,343 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 52 [2020-11-07 06:40:09,512 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-11-07 06:40:09,883 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2020-11-07 06:40:10,705 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,705 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,705 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,705 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,705 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,706 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-07 06:40:10,707 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 06:40:10,707 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,707 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,707 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,707 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,707 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 06:40:10,707 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-07 06:40:10,707 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-07 06:40:10,707 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-07 06:40:10,708 INFO L266 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-11-07 06:40:10,708 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-07 06:40:10,708 INFO L262 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,709 INFO L262 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (+ (* 3 main_~i~0) 1))) (and (<= .cse0 .cse1) (<= .cse1 (* 3 main_~n~0)) (<= .cse1 .cse0))) [2020-11-07 06:40:10,709 INFO L262 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,709 INFO L262 CegarLoopResult]: At program point L29-1(lines 29 35) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,709 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-11-07 06:40:10,709 INFO L262 CegarLoopResult]: At program point L29-2(line 29) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,709 INFO L262 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-11-07 06:40:10,709 INFO L269 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-11-07 06:40:10,710 INFO L262 CegarLoopResult]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,710 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 24 40) the Hoare annotation is: true [2020-11-07 06:40:10,710 INFO L269 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-11-07 06:40:10,710 INFO L262 CegarLoopResult]: At program point L29-5(lines 29 35) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 3)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-11-07 06:40:10,710 INFO L269 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: true [2020-11-07 06:40:10,710 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 24 40) the Hoare annotation is: true [2020-11-07 06:40:10,710 INFO L269 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: true [2020-11-07 06:40:10,710 INFO L262 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 2)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= (+ main_~a~0 main_~b~0 1) (* 3 main_~n~0)))) [2020-11-07 06:40:10,711 INFO L262 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,711 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 40) the Hoare annotation is: true [2020-11-07 06:40:10,712 INFO L269 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-11-07 06:40:10,712 INFO L262 CegarLoopResult]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-11-07 06:40:10,712 INFO L262 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (= main_~i~0 0) [2020-11-07 06:40:10,712 INFO L262 CegarLoopResult]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-11-07 06:40:10,712 INFO L262 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0)) [2020-11-07 06:40:10,712 INFO L262 CegarLoopResult]: At program point L26-3(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-11-07 06:40:10,712 INFO L262 CegarLoopResult]: At program point L26-4(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-11-07 06:40:10,713 INFO L262 CegarLoopResult]: At program point L26-5(line 26) the Hoare annotation is: (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0)) [2020-11-07 06:40:10,713 INFO L262 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:40:10,713 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-07 06:40:10,713 INFO L262 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:40:10,713 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:40:10,713 INFO L262 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:40:10,714 INFO L262 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:40:10,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:40:10 BoogieIcfgContainer [2020-11-07 06:40:10,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:40:10,739 INFO L168 Benchmark]: Toolchain (without parser) took 20145.05 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 127.0 MB in the beginning and 282.2 MB in the end (delta: -155.2 MB). Peak memory consumption was 182.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:10,739 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:40:10,740 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.83 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:10,742 INFO L168 Benchmark]: Boogie Preprocessor took 35.53 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:10,744 INFO L168 Benchmark]: RCFGBuilder took 445.22 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 133.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:10,751 INFO L168 Benchmark]: TraceAbstraction took 19301.48 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 133.5 MB in the beginning and 282.2 MB in the end (delta: -148.7 MB). Peak memory consumption was 188.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:40:10,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 343.83 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.53 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 445.22 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 133.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19301.48 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 133.5 MB in the beginning and 282.2 MB in the end (delta: -148.7 MB). Peak memory consumption was 188.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.4s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 12.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 424 SDtfs, 1174 SDslu, 1561 SDs, 0 SdLazy, 3595 SolverSat, 343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 432 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 199 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 51 LocationsWithAnnotation, 207 PreInvPairs, 283 NumberOfFragments, 396 HoareAnnotationTreeSize, 207 FomulaSimplifications, 7518688 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 51 FomulaSimplificationsInter, 1868 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 580 NumberOfCodeBlocks, 580 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 567 ConstructedInterpolants, 0 QuantifiedInterpolants, 220150 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 11/165 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...