/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:23:56,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:23:56,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:23:57,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:23:57,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:23:57,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:23:57,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:23:57,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:23:57,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:23:57,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:23:57,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:23:57,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:23:57,169 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:23:57,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:23:57,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:23:57,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:23:57,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:23:57,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:23:57,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:23:57,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:23:57,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:23:57,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:23:57,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:23:57,172 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:23:57,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:23:57,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:23:57,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:23:57,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:23:57,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:23:57,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:23:57,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:23:57,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:23:57,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:23:57,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:23:57,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:23:57,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:23:57,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:23:57,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:23:57,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:23:57,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:23:57,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:23:57,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:23:57,616 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:23:57,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-10-23 18:23:57,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cf3ae777/e41b1b48f14d464ea240397e99a64373/FLAGa0d6770bf [2020-10-23 18:23:58,345 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:23:58,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-10-23 18:23:58,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cf3ae777/e41b1b48f14d464ea240397e99a64373/FLAGa0d6770bf [2020-10-23 18:23:58,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cf3ae777/e41b1b48f14d464ea240397e99a64373 [2020-10-23 18:23:58,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:23:58,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:23:58,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:58,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:23:58,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:23:58,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:58" (1/1) ... [2020-10-23 18:23:58,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33589be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:58, skipping insertion in model container [2020-10-23 18:23:58,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:58" (1/1) ... [2020-10-23 18:23:58,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:23:58,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:23:58,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:58,963 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:23:59,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:59,045 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:23:59,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59 WrapperNode [2020-10-23 18:23:59,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:59,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:23:59,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:23:59,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:23:59,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (1/1) ... [2020-10-23 18:23:59,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:23:59,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:23:59,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:23:59,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:23:59,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (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 [2020-10-23 18:23:59,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:23:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:23:59,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:23:59,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:23:59,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:23:59,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:23:59,235 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:23:59,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:23:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:23:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:23:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:23:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:23:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:23:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:23:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:23:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:23:59,915 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:23:59,915 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:23:59,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:59 BoogieIcfgContainer [2020-10-23 18:23:59,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:23:59,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:23:59,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:23:59,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:23:59,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:23:58" (1/3) ... [2020-10-23 18:23:59,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601d4d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:59, skipping insertion in model container [2020-10-23 18:23:59,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:59" (2/3) ... [2020-10-23 18:23:59,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601d4d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:59, skipping insertion in model container [2020-10-23 18:23:59,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:59" (3/3) ... [2020-10-23 18:23:59,931 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-10-23 18:23:59,944 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:23:59,950 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:23:59,965 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:24:00,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:24:00,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:24:00,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:24:00,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:24:00,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:24:00,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:24:00,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:24:00,011 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:24:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-23 18:24:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:24:00,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:00,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:00,046 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2103640679, now seen corresponding path program 1 times [2020-10-23 18:24:00,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:00,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431371123] [2020-10-23 18:24:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:00,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:00,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431371123] [2020-10-23 18:24:00,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:00,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:00,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853719269] [2020-10-23 18:24:00,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:00,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:00,512 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-10-23 18:24:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:00,859 INFO L93 Difference]: Finished difference Result 80 states and 133 transitions. [2020-10-23 18:24:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:00,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:24:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:00,874 INFO L225 Difference]: With dead ends: 80 [2020-10-23 18:24:00,874 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 18:24:00,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 18:24:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-10-23 18:24:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:24:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 75 transitions. [2020-10-23 18:24:00,930 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 75 transitions. Word has length 20 [2020-10-23 18:24:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:00,931 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 75 transitions. [2020-10-23 18:24:00,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 75 transitions. [2020-10-23 18:24:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:24:00,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:00,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:00,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:24:00,933 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:00,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:00,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1845475241, now seen corresponding path program 1 times [2020-10-23 18:24:00,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:00,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252573452] [2020-10-23 18:24:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:01,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252573452] [2020-10-23 18:24:01,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:01,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:01,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705227241] [2020-10-23 18:24:01,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:01,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:01,071 INFO L87 Difference]: Start difference. First operand 44 states and 75 transitions. Second operand 4 states. [2020-10-23 18:24:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:01,338 INFO L93 Difference]: Finished difference Result 99 states and 175 transitions. [2020-10-23 18:24:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:01,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:24:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:01,342 INFO L225 Difference]: With dead ends: 99 [2020-10-23 18:24:01,342 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 18:24:01,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 18:24:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-23 18:24:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 18:24:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 103 transitions. [2020-10-23 18:24:01,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 103 transitions. Word has length 20 [2020-10-23 18:24:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:01,358 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 103 transitions. [2020-10-23 18:24:01,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 103 transitions. [2020-10-23 18:24:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:24:01,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:01,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:01,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:24:01,361 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash -781723127, now seen corresponding path program 1 times [2020-10-23 18:24:01,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:01,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788623479] [2020-10-23 18:24:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:01,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:01,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788623479] [2020-10-23 18:24:01,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:01,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:01,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995094773] [2020-10-23 18:24:01,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:01,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:01,505 INFO L87 Difference]: Start difference. First operand 60 states and 103 transitions. Second operand 4 states. [2020-10-23 18:24:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:01,803 INFO L93 Difference]: Finished difference Result 92 states and 156 transitions. [2020-10-23 18:24:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:01,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:24:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:01,806 INFO L225 Difference]: With dead ends: 92 [2020-10-23 18:24:01,806 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 18:24:01,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 18:24:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-23 18:24:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 18:24:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 105 transitions. [2020-10-23 18:24:01,821 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 105 transitions. Word has length 21 [2020-10-23 18:24:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:01,821 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 105 transitions. [2020-10-23 18:24:01,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 105 transitions. [2020-10-23 18:24:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:24:01,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:01,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:01,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:24:01,823 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:01,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1368529141, now seen corresponding path program 1 times [2020-10-23 18:24:01,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:01,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802717909] [2020-10-23 18:24:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:01,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:01,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802717909] [2020-10-23 18:24:01,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:01,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:01,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620145948] [2020-10-23 18:24:01,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:01,959 INFO L87 Difference]: Start difference. First operand 63 states and 105 transitions. Second operand 4 states. [2020-10-23 18:24:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:02,230 INFO L93 Difference]: Finished difference Result 167 states and 290 transitions. [2020-10-23 18:24:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:02,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:24:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:02,233 INFO L225 Difference]: With dead ends: 167 [2020-10-23 18:24:02,233 INFO L226 Difference]: Without dead ends: 113 [2020-10-23 18:24:02,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-23 18:24:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-23 18:24:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-23 18:24:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 190 transitions. [2020-10-23 18:24:02,250 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 190 transitions. Word has length 21 [2020-10-23 18:24:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:02,250 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 190 transitions. [2020-10-23 18:24:02,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 190 transitions. [2020-10-23 18:24:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:24:02,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:02,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:02,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:24:02,252 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1626694579, now seen corresponding path program 1 times [2020-10-23 18:24:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:02,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96621540] [2020-10-23 18:24:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:02,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96621540] [2020-10-23 18:24:02,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:02,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:02,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98997338] [2020-10-23 18:24:02,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:02,350 INFO L87 Difference]: Start difference. First operand 112 states and 190 transitions. Second operand 4 states. [2020-10-23 18:24:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:02,563 INFO L93 Difference]: Finished difference Result 144 states and 245 transitions. [2020-10-23 18:24:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:02,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:24:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:02,566 INFO L225 Difference]: With dead ends: 144 [2020-10-23 18:24:02,566 INFO L226 Difference]: Without dead ends: 141 [2020-10-23 18:24:02,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-23 18:24:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 112. [2020-10-23 18:24:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-23 18:24:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 188 transitions. [2020-10-23 18:24:02,581 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 188 transitions. Word has length 21 [2020-10-23 18:24:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:02,582 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 188 transitions. [2020-10-23 18:24:02,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 188 transitions. [2020-10-23 18:24:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:24:02,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:02,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:02,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:24:02,584 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash 531908642, now seen corresponding path program 1 times [2020-10-23 18:24:02,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926116522] [2020-10-23 18:24:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926116522] [2020-10-23 18:24:02,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:02,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105027161] [2020-10-23 18:24:02,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:02,692 INFO L87 Difference]: Start difference. First operand 112 states and 188 transitions. Second operand 4 states. [2020-10-23 18:24:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:02,892 INFO L93 Difference]: Finished difference Result 204 states and 349 transitions. [2020-10-23 18:24:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:02,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:24:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:02,894 INFO L225 Difference]: With dead ends: 204 [2020-10-23 18:24:02,895 INFO L226 Difference]: Without dead ends: 201 [2020-10-23 18:24:02,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-23 18:24:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2020-10-23 18:24:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-23 18:24:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2020-10-23 18:24:02,911 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 22 [2020-10-23 18:24:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:02,912 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2020-10-23 18:24:02,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2020-10-23 18:24:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:24:02,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:02,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:02,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:24:02,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash 790074080, now seen corresponding path program 1 times [2020-10-23 18:24:02,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:02,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219329208] [2020-10-23 18:24:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:02,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:02,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219329208] [2020-10-23 18:24:02,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:02,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:02,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975176966] [2020-10-23 18:24:02,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:02,985 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand 4 states. [2020-10-23 18:24:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:03,149 INFO L93 Difference]: Finished difference Result 352 states and 597 transitions. [2020-10-23 18:24:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:03,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:24:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:03,151 INFO L225 Difference]: With dead ends: 352 [2020-10-23 18:24:03,151 INFO L226 Difference]: Without dead ends: 209 [2020-10-23 18:24:03,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-23 18:24:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-23 18:24:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-23 18:24:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 344 transitions. [2020-10-23 18:24:03,171 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 344 transitions. Word has length 22 [2020-10-23 18:24:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:03,171 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 344 transitions. [2020-10-23 18:24:03,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 344 transitions. [2020-10-23 18:24:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:24:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:03,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:03,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:24:03,176 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -684051658, now seen corresponding path program 1 times [2020-10-23 18:24:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:03,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901088829] [2020-10-23 18:24:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:03,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:03,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901088829] [2020-10-23 18:24:03,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:03,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97297870] [2020-10-23 18:24:03,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:03,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:03,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:03,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:03,316 INFO L87 Difference]: Start difference. First operand 208 states and 344 transitions. Second operand 4 states. [2020-10-23 18:24:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:03,476 INFO L93 Difference]: Finished difference Result 314 states and 519 transitions. [2020-10-23 18:24:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:03,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:24:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:03,478 INFO L225 Difference]: With dead ends: 314 [2020-10-23 18:24:03,478 INFO L226 Difference]: Without dead ends: 215 [2020-10-23 18:24:03,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-23 18:24:03,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2020-10-23 18:24:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-23 18:24:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 348 transitions. [2020-10-23 18:24:03,493 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 348 transitions. Word has length 23 [2020-10-23 18:24:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:03,494 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 348 transitions. [2020-10-23 18:24:03,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 348 transitions. [2020-10-23 18:24:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:24:03,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:03,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:03,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:24:03,496 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1270857672, now seen corresponding path program 1 times [2020-10-23 18:24:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:03,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148398981] [2020-10-23 18:24:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:03,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:03,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148398981] [2020-10-23 18:24:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:03,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:03,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184450867] [2020-10-23 18:24:03,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:03,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:03,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:03,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:03,592 INFO L87 Difference]: Start difference. First operand 214 states and 348 transitions. Second operand 4 states. [2020-10-23 18:24:03,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:03,788 INFO L93 Difference]: Finished difference Result 382 states and 631 transitions. [2020-10-23 18:24:03,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:03,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:24:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:03,795 INFO L225 Difference]: With dead ends: 382 [2020-10-23 18:24:03,796 INFO L226 Difference]: Without dead ends: 379 [2020-10-23 18:24:03,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-23 18:24:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2020-10-23 18:24:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-23 18:24:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 476 transitions. [2020-10-23 18:24:03,818 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 476 transitions. Word has length 23 [2020-10-23 18:24:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:03,818 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 476 transitions. [2020-10-23 18:24:03,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 476 transitions. [2020-10-23 18:24:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:24:03,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:03,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:24:03,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:24:03,830 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1012692234, now seen corresponding path program 1 times [2020-10-23 18:24:03,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:03,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577681359] [2020-10-23 18:24:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:03,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:03,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577681359] [2020-10-23 18:24:03,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:03,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:03,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527443279] [2020-10-23 18:24:03,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:03,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:03,933 INFO L87 Difference]: Start difference. First operand 298 states and 476 transitions. Second operand 4 states. [2020-10-23 18:24:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:04,098 INFO L93 Difference]: Finished difference Result 686 states and 1103 transitions. [2020-10-23 18:24:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:04,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:24:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:04,102 INFO L225 Difference]: With dead ends: 686 [2020-10-23 18:24:04,102 INFO L226 Difference]: Without dead ends: 403 [2020-10-23 18:24:04,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-23 18:24:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2020-10-23 18:24:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-23 18:24:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 632 transitions. [2020-10-23 18:24:04,123 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 632 transitions. Word has length 23 [2020-10-23 18:24:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:04,123 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 632 transitions. [2020-10-23 18:24:04,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 632 transitions. [2020-10-23 18:24:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:04,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:04,125 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] [2020-10-23 18:24:04,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:24:04,125 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash -735221973, now seen corresponding path program 1 times [2020-10-23 18:24:04,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:04,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413671679] [2020-10-23 18:24:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:04,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:04,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413671679] [2020-10-23 18:24:04,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:04,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:04,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233617466] [2020-10-23 18:24:04,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:04,196 INFO L87 Difference]: Start difference. First operand 402 states and 632 transitions. Second operand 4 states. [2020-10-23 18:24:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:04,383 INFO L93 Difference]: Finished difference Result 602 states and 943 transitions. [2020-10-23 18:24:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:04,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:24:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:04,386 INFO L225 Difference]: With dead ends: 602 [2020-10-23 18:24:04,387 INFO L226 Difference]: Without dead ends: 411 [2020-10-23 18:24:04,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-23 18:24:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2020-10-23 18:24:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-23 18:24:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 632 transitions. [2020-10-23 18:24:04,407 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 632 transitions. Word has length 24 [2020-10-23 18:24:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:04,407 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 632 transitions. [2020-10-23 18:24:04,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 632 transitions. [2020-10-23 18:24:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:04,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:04,409 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] [2020-10-23 18:24:04,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:24:04,409 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1322027987, now seen corresponding path program 1 times [2020-10-23 18:24:04,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:04,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671165438] [2020-10-23 18:24:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:04,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:04,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671165438] [2020-10-23 18:24:04,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:04,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:04,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353225042] [2020-10-23 18:24:04,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:04,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:04,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:04,473 INFO L87 Difference]: Start difference. First operand 410 states and 632 transitions. Second operand 4 states. [2020-10-23 18:24:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:04,658 INFO L93 Difference]: Finished difference Result 718 states and 1123 transitions. [2020-10-23 18:24:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:04,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:24:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:04,662 INFO L225 Difference]: With dead ends: 718 [2020-10-23 18:24:04,663 INFO L226 Difference]: Without dead ends: 715 [2020-10-23 18:24:04,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-23 18:24:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 586. [2020-10-23 18:24:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-23 18:24:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 880 transitions. [2020-10-23 18:24:04,704 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 880 transitions. Word has length 24 [2020-10-23 18:24:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:04,704 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 880 transitions. [2020-10-23 18:24:04,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 880 transitions. [2020-10-23 18:24:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:24:04,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:04,711 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] [2020-10-23 18:24:04,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:24:04,711 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1063862549, now seen corresponding path program 1 times [2020-10-23 18:24:04,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:04,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549502546] [2020-10-23 18:24:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:04,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:04,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549502546] [2020-10-23 18:24:04,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:04,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:04,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142502861] [2020-10-23 18:24:04,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:04,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:04,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:04,803 INFO L87 Difference]: Start difference. First operand 586 states and 880 transitions. Second operand 4 states. [2020-10-23 18:24:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:04,984 INFO L93 Difference]: Finished difference Result 1342 states and 2019 transitions. [2020-10-23 18:24:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:04,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:24:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:04,990 INFO L225 Difference]: With dead ends: 1342 [2020-10-23 18:24:04,990 INFO L226 Difference]: Without dead ends: 779 [2020-10-23 18:24:04,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-23 18:24:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 778. [2020-10-23 18:24:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-23 18:24:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1144 transitions. [2020-10-23 18:24:05,029 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1144 transitions. Word has length 24 [2020-10-23 18:24:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:05,030 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1144 transitions. [2020-10-23 18:24:05,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1144 transitions. [2020-10-23 18:24:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:24:05,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:05,032 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] [2020-10-23 18:24:05,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:24:05,032 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1973476129, now seen corresponding path program 1 times [2020-10-23 18:24:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:05,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271125455] [2020-10-23 18:24:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:05,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271125455] [2020-10-23 18:24:05,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:05,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:05,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777680249] [2020-10-23 18:24:05,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:05,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:05,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:05,110 INFO L87 Difference]: Start difference. First operand 778 states and 1144 transitions. Second operand 4 states. [2020-10-23 18:24:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:05,295 INFO L93 Difference]: Finished difference Result 1166 states and 1707 transitions. [2020-10-23 18:24:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:05,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:24:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:05,301 INFO L225 Difference]: With dead ends: 1166 [2020-10-23 18:24:05,302 INFO L226 Difference]: Without dead ends: 795 [2020-10-23 18:24:05,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-23 18:24:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 794. [2020-10-23 18:24:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-10-23 18:24:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1144 transitions. [2020-10-23 18:24:05,349 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1144 transitions. Word has length 25 [2020-10-23 18:24:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:05,349 INFO L481 AbstractCegarLoop]: Abstraction has 794 states and 1144 transitions. [2020-10-23 18:24:05,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1144 transitions. [2020-10-23 18:24:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:24:05,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:05,351 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] [2020-10-23 18:24:05,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:24:05,352 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:05,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1386670115, now seen corresponding path program 1 times [2020-10-23 18:24:05,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:05,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263219249] [2020-10-23 18:24:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:05,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:05,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263219249] [2020-10-23 18:24:05,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:05,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:05,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090168892] [2020-10-23 18:24:05,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:05,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:05,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:05,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:05,426 INFO L87 Difference]: Start difference. First operand 794 states and 1144 transitions. Second operand 4 states. [2020-10-23 18:24:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:05,613 INFO L93 Difference]: Finished difference Result 1358 states and 1979 transitions. [2020-10-23 18:24:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:05,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:24:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:05,621 INFO L225 Difference]: With dead ends: 1358 [2020-10-23 18:24:05,621 INFO L226 Difference]: Without dead ends: 1355 [2020-10-23 18:24:05,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-10-23 18:24:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1162. [2020-10-23 18:24:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-23 18:24:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1624 transitions. [2020-10-23 18:24:05,672 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1624 transitions. Word has length 25 [2020-10-23 18:24:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:05,672 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1624 transitions. [2020-10-23 18:24:05,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1624 transitions. [2020-10-23 18:24:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:24:05,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:05,676 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] [2020-10-23 18:24:05,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:24:05,676 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1644835553, now seen corresponding path program 1 times [2020-10-23 18:24:05,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:05,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946295358] [2020-10-23 18:24:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:05,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:05,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946295358] [2020-10-23 18:24:05,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:05,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354470999] [2020-10-23 18:24:05,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:05,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:05,748 INFO L87 Difference]: Start difference. First operand 1162 states and 1624 transitions. Second operand 4 states. [2020-10-23 18:24:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:05,942 INFO L93 Difference]: Finished difference Result 2638 states and 3675 transitions. [2020-10-23 18:24:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:05,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:24:05,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:05,951 INFO L225 Difference]: With dead ends: 2638 [2020-10-23 18:24:05,952 INFO L226 Difference]: Without dead ends: 1515 [2020-10-23 18:24:05,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2020-10-23 18:24:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1514. [2020-10-23 18:24:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-10-23 18:24:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2056 transitions. [2020-10-23 18:24:06,053 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2056 transitions. Word has length 25 [2020-10-23 18:24:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:06,054 INFO L481 AbstractCegarLoop]: Abstraction has 1514 states and 2056 transitions. [2020-10-23 18:24:06,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2056 transitions. [2020-10-23 18:24:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:24:06,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:06,057 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] [2020-10-23 18:24:06,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:24:06,057 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:06,058 INFO L82 PathProgramCache]: Analyzing trace with hash 43781942, now seen corresponding path program 1 times [2020-10-23 18:24:06,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:06,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593145064] [2020-10-23 18:24:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:06,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:06,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593145064] [2020-10-23 18:24:06,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:06,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:06,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919887870] [2020-10-23 18:24:06,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:06,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:06,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:06,116 INFO L87 Difference]: Start difference. First operand 1514 states and 2056 transitions. Second operand 4 states. [2020-10-23 18:24:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:06,292 INFO L93 Difference]: Finished difference Result 2270 states and 3067 transitions. [2020-10-23 18:24:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:06,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:24:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:06,301 INFO L225 Difference]: With dead ends: 2270 [2020-10-23 18:24:06,301 INFO L226 Difference]: Without dead ends: 1547 [2020-10-23 18:24:06,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2020-10-23 18:24:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1546. [2020-10-23 18:24:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-10-23 18:24:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2056 transitions. [2020-10-23 18:24:06,372 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2056 transitions. Word has length 26 [2020-10-23 18:24:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:06,372 INFO L481 AbstractCegarLoop]: Abstraction has 1546 states and 2056 transitions. [2020-10-23 18:24:06,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2056 transitions. [2020-10-23 18:24:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:24:06,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:06,375 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] [2020-10-23 18:24:06,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 18:24:06,376 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash -543024072, now seen corresponding path program 1 times [2020-10-23 18:24:06,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:06,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797387924] [2020-10-23 18:24:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:06,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:06,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797387924] [2020-10-23 18:24:06,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367832645] [2020-10-23 18:24:06,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:06,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:06,432 INFO L87 Difference]: Start difference. First operand 1546 states and 2056 transitions. Second operand 4 states. [2020-10-23 18:24:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:06,637 INFO L93 Difference]: Finished difference Result 2574 states and 3435 transitions. [2020-10-23 18:24:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:06,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:24:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:06,650 INFO L225 Difference]: With dead ends: 2574 [2020-10-23 18:24:06,650 INFO L226 Difference]: Without dead ends: 2571 [2020-10-23 18:24:06,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-10-23 18:24:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2314. [2020-10-23 18:24:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-10-23 18:24:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2984 transitions. [2020-10-23 18:24:06,767 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2984 transitions. Word has length 26 [2020-10-23 18:24:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:06,767 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 2984 transitions. [2020-10-23 18:24:06,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2984 transitions. [2020-10-23 18:24:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:24:06,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:06,772 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] [2020-10-23 18:24:06,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 18:24:06,772 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -284858634, now seen corresponding path program 1 times [2020-10-23 18:24:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:06,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106944919] [2020-10-23 18:24:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:06,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:06,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106944919] [2020-10-23 18:24:06,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:06,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:06,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687804817] [2020-10-23 18:24:06,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:06,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:06,855 INFO L87 Difference]: Start difference. First operand 2314 states and 2984 transitions. Second operand 4 states. [2020-10-23 18:24:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:07,090 INFO L93 Difference]: Finished difference Result 5198 states and 6635 transitions. [2020-10-23 18:24:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:07,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:24:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:07,105 INFO L225 Difference]: With dead ends: 5198 [2020-10-23 18:24:07,105 INFO L226 Difference]: Without dead ends: 2955 [2020-10-23 18:24:07,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2020-10-23 18:24:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2954. [2020-10-23 18:24:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-10-23 18:24:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 3656 transitions. [2020-10-23 18:24:07,273 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 3656 transitions. Word has length 26 [2020-10-23 18:24:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:07,273 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 3656 transitions. [2020-10-23 18:24:07,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 3656 transitions. [2020-10-23 18:24:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:24:07,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:07,278 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] [2020-10-23 18:24:07,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 18:24:07,279 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:07,279 INFO L82 PathProgramCache]: Analyzing trace with hash 352814860, now seen corresponding path program 1 times [2020-10-23 18:24:07,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:07,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739469824] [2020-10-23 18:24:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:07,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739469824] [2020-10-23 18:24:07,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:07,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:07,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392833389] [2020-10-23 18:24:07,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:07,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:07,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:07,339 INFO L87 Difference]: Start difference. First operand 2954 states and 3656 transitions. Second operand 4 states. [2020-10-23 18:24:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:07,545 INFO L93 Difference]: Finished difference Result 4430 states and 5451 transitions. [2020-10-23 18:24:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:07,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:24:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:07,559 INFO L225 Difference]: With dead ends: 4430 [2020-10-23 18:24:07,559 INFO L226 Difference]: Without dead ends: 3019 [2020-10-23 18:24:07,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2020-10-23 18:24:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3018. [2020-10-23 18:24:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-10-23 18:24:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 3656 transitions. [2020-10-23 18:24:07,697 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 3656 transitions. Word has length 27 [2020-10-23 18:24:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 3656 transitions. [2020-10-23 18:24:07,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 3656 transitions. [2020-10-23 18:24:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:24:07,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:07,702 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] [2020-10-23 18:24:07,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 18:24:07,703 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -233991154, now seen corresponding path program 1 times [2020-10-23 18:24:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:07,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636178352] [2020-10-23 18:24:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:07,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:07,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636178352] [2020-10-23 18:24:07,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:07,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:07,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090728686] [2020-10-23 18:24:07,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:07,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:07,767 INFO L87 Difference]: Start difference. First operand 3018 states and 3656 transitions. Second operand 4 states. [2020-10-23 18:24:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:08,058 INFO L93 Difference]: Finished difference Result 4877 states and 5834 transitions. [2020-10-23 18:24:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:08,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:24:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:08,080 INFO L225 Difference]: With dead ends: 4877 [2020-10-23 18:24:08,080 INFO L226 Difference]: Without dead ends: 4874 [2020-10-23 18:24:08,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-10-23 18:24:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4618. [2020-10-23 18:24:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4618 states. [2020-10-23 18:24:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 5448 transitions. [2020-10-23 18:24:08,253 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 5448 transitions. Word has length 27 [2020-10-23 18:24:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:08,253 INFO L481 AbstractCegarLoop]: Abstraction has 4618 states and 5448 transitions. [2020-10-23 18:24:08,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 5448 transitions. [2020-10-23 18:24:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:24:08,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:24:08,262 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] [2020-10-23 18:24:08,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:24:08,262 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:24:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:24:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash 24174284, now seen corresponding path program 1 times [2020-10-23 18:24:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:24:08,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948675773] [2020-10-23 18:24:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:24:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:08,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:24:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:24:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:24:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948675773] [2020-10-23 18:24:08,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:24:08,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:24:08,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433591815] [2020-10-23 18:24:08,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:24:08,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:24:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:24:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:24:08,325 INFO L87 Difference]: Start difference. First operand 4618 states and 5448 transitions. Second operand 4 states. [2020-10-23 18:24:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:24:08,626 INFO L93 Difference]: Finished difference Result 10250 states and 11848 transitions. [2020-10-23 18:24:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:24:08,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:24:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:24:08,628 INFO L225 Difference]: With dead ends: 10250 [2020-10-23 18:24:08,628 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:24:08,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:24:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:24:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:24:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:24:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:24:08,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-10-23 18:24:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:24:08,651 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:24:08,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:24:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:24:08,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:24:08,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 18:24:08,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:24:15,001 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 1093 DAG size of output: 32 [2020-10-23 18:24:15,053 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:24:15,053 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:24:15,053 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:24:15,054 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:24:15,054 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:24:15,054 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:24:15,054 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:24:15,054 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:24:15,054 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:24:15,054 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:24:15,054 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 137) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L102-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L277 CegarLoopResult]: At program point L127-1(lines 35 132) the Hoare annotation is: true [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L86-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L78-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,055 INFO L274 CegarLoopResult]: For program point L103(line 103) no Hoare annotation was computed. [2020-10-23 18:24:15,056 INFO L274 CegarLoopResult]: For program point L37(lines 37 39) no Hoare annotation was computed. [2020-10-23 18:24:15,056 INFO L274 CegarLoopResult]: For program point L70-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L270 CegarLoopResult]: At program point L128-1(lines 7 137) the Hoare annotation is: false [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L62-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L112-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 137) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 137) the Hoare annotation is: true [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L113(line 113) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L97-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L122-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-10-23 18:24:15,057 INFO L274 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L82-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L107-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L74-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L66-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L58(lines 58 60) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L58-2(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L108(line 108) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L277 CegarLoopResult]: At program point L133(lines 7 137) the Hoare annotation is: true [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L92-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,058 INFO L274 CegarLoopResult]: For program point L117-1(lines 35 132) no Hoare annotation was computed. [2020-10-23 18:24:15,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:24:15 BoogieIcfgContainer [2020-10-23 18:24:15,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:24:15,084 INFO L168 Benchmark]: Toolchain (without parser) took 16387.84 ms. Allocated memory was 151.0 MB in the beginning and 475.0 MB in the end (delta: 324.0 MB). Free memory was 127.1 MB in the beginning and 291.0 MB in the end (delta: -163.9 MB). Peak memory consumption was 221.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:15,084 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:24:15,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:15,086 INFO L168 Benchmark]: Boogie Preprocessor took 85.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:15,087 INFO L168 Benchmark]: RCFGBuilder took 782.90 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 133.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:15,087 INFO L168 Benchmark]: TraceAbstraction took 15157.77 ms. Allocated memory was 151.0 MB in the beginning and 475.0 MB in the end (delta: 324.0 MB). Free memory was 132.6 MB in the beginning and 291.0 MB in the end (delta: -158.4 MB). Peak memory consumption was 225.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:24:15,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 342.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 782.90 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 133.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15157.77 ms. Allocated memory was 151.0 MB in the beginning and 475.0 MB in the end (delta: 324.0 MB). Free memory was 132.6 MB in the beginning and 291.0 MB in the end (delta: -158.4 MB). Peak memory consumption was 225.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 35]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.6s, OverallIterations: 22, TraceHistogramMax: 1, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1563 SDtfs, 2212 SDslu, 171 SDs, 0 SdLazy, 1125 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4618occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 29 PreInvPairs, 288 NumberOfFragments, 38 HoareAnnotationTreeSize, 29 FomulaSimplifications, 3426278 FormulaSimplificationTreeSizeReduction, 6.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 522 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 500 ConstructedInterpolants, 0 QuantifiedInterpolants, 35954 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...