/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_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:23:46,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:23:46,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:23:46,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:23:46,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:23:46,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:23:46,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:23:46,221 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 18:23:46,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:23:46,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:23:46,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:23:46,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:23:46,289 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:23:46,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:23:46,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:23:46,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:23:46,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:23:46,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:23:46,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:23:46,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:23:46,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:23:46,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:23:46,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:23:46,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:23:46,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:23:46,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:23:46,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:23:46,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:23:46,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:23:46,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:23:46,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:23:46,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:23:46,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:23:46,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:23:46,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:23:46,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:23:46,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:23:46,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:23:46,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:23:46,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:23:46,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:23:46,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:23:46,723 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:23:46,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-10-23 18:23:46,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c903950a3/72c868a4e3b042ac8c3e0944fa5af516/FLAGe73d5106a [2020-10-23 18:23:47,463 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:23:47,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2020-10-23 18:23:47,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c903950a3/72c868a4e3b042ac8c3e0944fa5af516/FLAGe73d5106a [2020-10-23 18:23:47,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c903950a3/72c868a4e3b042ac8c3e0944fa5af516 [2020-10-23 18:23:47,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:23:47,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:23:47,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:47,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:23:47,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:23:47,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:47" (1/1) ... [2020-10-23 18:23:47,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3a5c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:47, skipping insertion in model container [2020-10-23 18:23:47,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:23:47" (1/1) ... [2020-10-23 18:23:47,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:23:47,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:23:48,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:48,058 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:23:48,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:23:48,099 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:23:48,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48 WrapperNode [2020-10-23 18:23:48,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:23:48,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:23:48,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:23:48,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:23:48,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (1/1) ... [2020-10-23 18:23:48,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:23:48,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:23:48,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:23:48,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:23:48,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (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 18:23:48,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:23:48,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:23:48,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:23:48,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:23:48,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:23:48,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:23:48,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:23:48,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:23:48,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:23:48,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:23:48,564 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:23:48,564 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:23:48,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:48 BoogieIcfgContainer [2020-10-23 18:23:48,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:23:48,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:23:48,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:23:48,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:23:48,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:23:47" (1/3) ... [2020-10-23 18:23:48,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6047dd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:48, skipping insertion in model container [2020-10-23 18:23:48,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:23:48" (2/3) ... [2020-10-23 18:23:48,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6047dd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:23:48, skipping insertion in model container [2020-10-23 18:23:48,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:23:48" (3/3) ... [2020-10-23 18:23:48,577 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-10-23 18:23:48,591 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:23:48,597 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:23:48,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:23:48,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:23:48,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:23:48,653 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:23:48,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:23:48,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:23:48,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:23:48,654 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:23:48,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:23:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-23 18:23:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:23:48,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:48,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:48,703 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2118099465, now seen corresponding path program 1 times [2020-10-23 18:23:48,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:48,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525013860] [2020-10-23 18:23:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,103 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 18:23:49,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525013860] [2020-10-23 18:23:49,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:49,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432499137] [2020-10-23 18:23:49,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:49,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:49,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:49,148 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-23 18:23:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:49,407 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-10-23 18:23:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:49,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 18:23:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:49,422 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:23:49,423 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:23:49,426 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 18:23:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:23:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-23 18:23:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:23:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 59 transitions. [2020-10-23 18:23:49,479 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 59 transitions. Word has length 18 [2020-10-23 18:23:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:49,480 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 59 transitions. [2020-10-23 18:23:49,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 59 transitions. [2020-10-23 18:23:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:23:49,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:49,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:49,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:23:49,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1783840821, now seen corresponding path program 1 times [2020-10-23 18:23:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941357560] [2020-10-23 18:23:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,665 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 18:23:49,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941357560] [2020-10-23 18:23:49,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:49,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:49,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977687432] [2020-10-23 18:23:49,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:49,675 INFO L87 Difference]: Start difference. First operand 36 states and 59 transitions. Second operand 4 states. [2020-10-23 18:23:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:49,901 INFO L93 Difference]: Finished difference Result 79 states and 135 transitions. [2020-10-23 18:23:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:49,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 18:23:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:49,904 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:23:49,904 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:23:49,906 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 18:23:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:23:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-23 18:23:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:23:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 79 transitions. [2020-10-23 18:23:49,919 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 79 transitions. Word has length 18 [2020-10-23 18:23:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:49,919 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 79 transitions. [2020-10-23 18:23:49,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 79 transitions. [2020-10-23 18:23:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:23:49,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:49,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:49,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:23:49,922 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1229925405, now seen corresponding path program 1 times [2020-10-23 18:23:49,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:49,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331152492] [2020-10-23 18:23:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:49,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,012 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 18:23:50,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331152492] [2020-10-23 18:23:50,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:50,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:50,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802310974] [2020-10-23 18:23:50,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:50,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:50,015 INFO L87 Difference]: Start difference. First operand 48 states and 79 transitions. Second operand 4 states. [2020-10-23 18:23:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:50,168 INFO L93 Difference]: Finished difference Result 74 states and 120 transitions. [2020-10-23 18:23:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:50,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 18:23:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:50,171 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:23:50,171 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 18:23:50,172 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 18:23:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 18:23:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-23 18:23:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 18:23:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2020-10-23 18:23:50,183 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 19 [2020-10-23 18:23:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:50,183 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2020-10-23 18:23:50,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:50,183 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2020-10-23 18:23:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:23:50,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:50,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:50,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:23:50,185 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:50,186 INFO L82 PathProgramCache]: Analyzing trace with hash -528860827, now seen corresponding path program 1 times [2020-10-23 18:23:50,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:50,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720086084] [2020-10-23 18:23:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,259 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 18:23:50,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720086084] [2020-10-23 18:23:50,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:50,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:50,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137562484] [2020-10-23 18:23:50,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:50,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:50,263 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand 4 states. [2020-10-23 18:23:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:50,393 INFO L93 Difference]: Finished difference Result 131 states and 218 transitions. [2020-10-23 18:23:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:50,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 18:23:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:50,395 INFO L225 Difference]: With dead ends: 131 [2020-10-23 18:23:50,396 INFO L226 Difference]: Without dead ends: 89 [2020-10-23 18:23:50,397 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 18:23:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-23 18:23:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-23 18:23:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-23 18:23:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 142 transitions. [2020-10-23 18:23:50,410 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 142 transitions. Word has length 19 [2020-10-23 18:23:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:50,410 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 142 transitions. [2020-10-23 18:23:50,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 142 transitions. [2020-10-23 18:23:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:23:50,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:50,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:50,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:23:50,412 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash -135833817, now seen corresponding path program 1 times [2020-10-23 18:23:50,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:50,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080465089] [2020-10-23 18:23:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,481 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 18:23:50,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080465089] [2020-10-23 18:23:50,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:50,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:50,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359108711] [2020-10-23 18:23:50,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:50,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:50,484 INFO L87 Difference]: Start difference. First operand 88 states and 142 transitions. Second operand 4 states. [2020-10-23 18:23:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:50,603 INFO L93 Difference]: Finished difference Result 112 states and 181 transitions. [2020-10-23 18:23:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:50,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 18:23:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:50,605 INFO L225 Difference]: With dead ends: 112 [2020-10-23 18:23:50,606 INFO L226 Difference]: Without dead ends: 109 [2020-10-23 18:23:50,606 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 18:23:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-23 18:23:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2020-10-23 18:23:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-23 18:23:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 140 transitions. [2020-10-23 18:23:50,618 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 140 transitions. Word has length 19 [2020-10-23 18:23:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:50,618 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 140 transitions. [2020-10-23 18:23:50,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 140 transitions. [2020-10-23 18:23:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:23:50,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:50,620 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 18:23:50,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:23:50,621 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:50,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:50,621 INFO L82 PathProgramCache]: Analyzing trace with hash 791842688, now seen corresponding path program 1 times [2020-10-23 18:23:50,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:50,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547058287] [2020-10-23 18:23:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,681 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 18:23:50,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547058287] [2020-10-23 18:23:50,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:50,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055775568] [2020-10-23 18:23:50,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:50,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:50,684 INFO L87 Difference]: Start difference. First operand 88 states and 140 transitions. Second operand 4 states. [2020-10-23 18:23:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:50,829 INFO L93 Difference]: Finished difference Result 156 states and 253 transitions. [2020-10-23 18:23:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:50,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:23:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:50,831 INFO L225 Difference]: With dead ends: 156 [2020-10-23 18:23:50,831 INFO L226 Difference]: Without dead ends: 153 [2020-10-23 18:23:50,832 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 18:23:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-23 18:23:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 120. [2020-10-23 18:23:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 18:23:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-10-23 18:23:50,847 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 20 [2020-10-23 18:23:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:50,847 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-10-23 18:23:50,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-10-23 18:23:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:23:50,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:50,849 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 18:23:50,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:23:50,850 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash 398815678, now seen corresponding path program 1 times [2020-10-23 18:23:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:50,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624441201] [2020-10-23 18:23:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:50,913 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 18:23:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624441201] [2020-10-23 18:23:50,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:50,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:50,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087677191] [2020-10-23 18:23:50,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:50,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:50,916 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 4 states. [2020-10-23 18:23:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:51,033 INFO L93 Difference]: Finished difference Result 272 states and 437 transitions. [2020-10-23 18:23:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:51,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:23:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:51,035 INFO L225 Difference]: With dead ends: 272 [2020-10-23 18:23:51,035 INFO L226 Difference]: Without dead ends: 161 [2020-10-23 18:23:51,037 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 18:23:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-23 18:23:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-23 18:23:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-23 18:23:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2020-10-23 18:23:51,051 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 20 [2020-10-23 18:23:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:51,051 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2020-10-23 18:23:51,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2020-10-23 18:23:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:23:51,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:51,053 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 18:23:51,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:23:51,054 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1216010736, now seen corresponding path program 1 times [2020-10-23 18:23:51,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:51,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350181116] [2020-10-23 18:23:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,134 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 18:23:51,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350181116] [2020-10-23 18:23:51,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:51,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:51,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173339170] [2020-10-23 18:23:51,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:51,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:51,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:51,140 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand 4 states. [2020-10-23 18:23:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:51,258 INFO L93 Difference]: Finished difference Result 242 states and 375 transitions. [2020-10-23 18:23:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:51,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:23:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:51,261 INFO L225 Difference]: With dead ends: 242 [2020-10-23 18:23:51,262 INFO L226 Difference]: Without dead ends: 167 [2020-10-23 18:23:51,263 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 18:23:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-23 18:23:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-23 18:23:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-23 18:23:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 252 transitions. [2020-10-23 18:23:51,289 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 252 transitions. Word has length 21 [2020-10-23 18:23:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:51,290 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 252 transitions. [2020-10-23 18:23:51,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 252 transitions. [2020-10-23 18:23:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:23:51,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:51,291 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 18:23:51,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:23:51,292 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash -514946158, now seen corresponding path program 1 times [2020-10-23 18:23:51,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:51,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543331305] [2020-10-23 18:23:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,382 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 18:23:51,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543331305] [2020-10-23 18:23:51,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:51,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:51,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668753241] [2020-10-23 18:23:51,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:51,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:51,385 INFO L87 Difference]: Start difference. First operand 166 states and 252 transitions. Second operand 4 states. [2020-10-23 18:23:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:51,507 INFO L93 Difference]: Finished difference Result 286 states and 439 transitions. [2020-10-23 18:23:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:51,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:23:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:51,509 INFO L225 Difference]: With dead ends: 286 [2020-10-23 18:23:51,510 INFO L226 Difference]: Without dead ends: 283 [2020-10-23 18:23:51,510 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 18:23:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-23 18:23:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 234. [2020-10-23 18:23:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-23 18:23:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 348 transitions. [2020-10-23 18:23:51,522 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 348 transitions. Word has length 21 [2020-10-23 18:23:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:51,523 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 348 transitions. [2020-10-23 18:23:51,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 348 transitions. [2020-10-23 18:23:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:23:51,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:51,525 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 18:23:51,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:23:51,525 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:51,526 INFO L82 PathProgramCache]: Analyzing trace with hash -907973168, now seen corresponding path program 1 times [2020-10-23 18:23:51,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:51,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193842713] [2020-10-23 18:23:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,603 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 18:23:51,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193842713] [2020-10-23 18:23:51,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:51,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335224000] [2020-10-23 18:23:51,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:51,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:51,605 INFO L87 Difference]: Start difference. First operand 234 states and 348 transitions. Second operand 4 states. [2020-10-23 18:23:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:51,720 INFO L93 Difference]: Finished difference Result 526 states and 783 transitions. [2020-10-23 18:23:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:51,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 18:23:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:51,722 INFO L225 Difference]: With dead ends: 526 [2020-10-23 18:23:51,722 INFO L226 Difference]: Without dead ends: 307 [2020-10-23 18:23:51,724 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 18:23:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-23 18:23:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2020-10-23 18:23:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-23 18:23:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 440 transitions. [2020-10-23 18:23:51,738 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 440 transitions. Word has length 21 [2020-10-23 18:23:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:51,739 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 440 transitions. [2020-10-23 18:23:51,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:51,739 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 440 transitions. [2020-10-23 18:23:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:23:51,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:51,740 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 18:23:51,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:23:51,741 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1223218569, now seen corresponding path program 1 times [2020-10-23 18:23:51,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:51,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839663890] [2020-10-23 18:23:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,793 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 18:23:51,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839663890] [2020-10-23 18:23:51,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:51,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:51,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288115961] [2020-10-23 18:23:51,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:51,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:51,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:51,796 INFO L87 Difference]: Start difference. First operand 306 states and 440 transitions. Second operand 4 states. [2020-10-23 18:23:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:51,927 INFO L93 Difference]: Finished difference Result 458 states and 655 transitions. [2020-10-23 18:23:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:51,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:23:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:51,930 INFO L225 Difference]: With dead ends: 458 [2020-10-23 18:23:51,930 INFO L226 Difference]: Without dead ends: 315 [2020-10-23 18:23:51,931 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 18:23:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-23 18:23:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2020-10-23 18:23:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-23 18:23:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 440 transitions. [2020-10-23 18:23:51,947 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 440 transitions. Word has length 22 [2020-10-23 18:23:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:51,947 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 440 transitions. [2020-10-23 18:23:51,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 440 transitions. [2020-10-23 18:23:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:23:51,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:51,949 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 18:23:51,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:23:51,949 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1924283147, now seen corresponding path program 1 times [2020-10-23 18:23:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849867946] [2020-10-23 18:23:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,005 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 18:23:52,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849867946] [2020-10-23 18:23:52,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:52,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:52,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129685182] [2020-10-23 18:23:52,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:52,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:52,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:52,008 INFO L87 Difference]: Start difference. First operand 314 states and 440 transitions. Second operand 4 states. [2020-10-23 18:23:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:52,141 INFO L93 Difference]: Finished difference Result 526 states and 739 transitions. [2020-10-23 18:23:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:52,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:23:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:52,145 INFO L225 Difference]: With dead ends: 526 [2020-10-23 18:23:52,145 INFO L226 Difference]: Without dead ends: 523 [2020-10-23 18:23:52,146 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 18:23:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-23 18:23:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 458. [2020-10-23 18:23:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-23 18:23:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 624 transitions. [2020-10-23 18:23:52,167 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 624 transitions. Word has length 22 [2020-10-23 18:23:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:52,167 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 624 transitions. [2020-10-23 18:23:52,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 624 transitions. [2020-10-23 18:23:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:23:52,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:52,169 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 18:23:52,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:23:52,169 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1531256137, now seen corresponding path program 1 times [2020-10-23 18:23:52,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:52,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834281845] [2020-10-23 18:23:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,249 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 18:23:52,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834281845] [2020-10-23 18:23:52,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:52,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:52,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292314541] [2020-10-23 18:23:52,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:52,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:52,252 INFO L87 Difference]: Start difference. First operand 458 states and 624 transitions. Second operand 4 states. [2020-10-23 18:23:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:52,400 INFO L93 Difference]: Finished difference Result 1022 states and 1379 transitions. [2020-10-23 18:23:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:52,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:23:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:52,404 INFO L225 Difference]: With dead ends: 1022 [2020-10-23 18:23:52,404 INFO L226 Difference]: Without dead ends: 587 [2020-10-23 18:23:52,406 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 18:23:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-23 18:23:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 586. [2020-10-23 18:23:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-23 18:23:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2020-10-23 18:23:52,436 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 22 [2020-10-23 18:23:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:52,437 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2020-10-23 18:23:52,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2020-10-23 18:23:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:23:52,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:52,439 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 18:23:52,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:23:52,439 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash -470073733, now seen corresponding path program 1 times [2020-10-23 18:23:52,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:52,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70517195] [2020-10-23 18:23:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,493 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 18:23:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70517195] [2020-10-23 18:23:52,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:52,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959211797] [2020-10-23 18:23:52,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:52,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:52,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:52,496 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand 4 states. [2020-10-23 18:23:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:52,637 INFO L93 Difference]: Finished difference Result 878 states and 1131 transitions. [2020-10-23 18:23:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:52,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:23:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:52,641 INFO L225 Difference]: With dead ends: 878 [2020-10-23 18:23:52,641 INFO L226 Difference]: Without dead ends: 603 [2020-10-23 18:23:52,643 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 18:23:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2020-10-23 18:23:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 602. [2020-10-23 18:23:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-10-23 18:23:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 760 transitions. [2020-10-23 18:23:52,673 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 760 transitions. Word has length 23 [2020-10-23 18:23:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:52,673 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 760 transitions. [2020-10-23 18:23:52,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 760 transitions. [2020-10-23 18:23:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:23:52,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:52,675 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 18:23:52,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:23:52,675 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash 230990845, now seen corresponding path program 1 times [2020-10-23 18:23:52,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:52,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051126130] [2020-10-23 18:23:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:52,724 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 18:23:52,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051126130] [2020-10-23 18:23:52,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:52,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341760329] [2020-10-23 18:23:52,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:52,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:52,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:52,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:52,726 INFO L87 Difference]: Start difference. First operand 602 states and 760 transitions. Second operand 4 states. [2020-10-23 18:23:52,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:52,886 INFO L93 Difference]: Finished difference Result 973 states and 1210 transitions. [2020-10-23 18:23:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:52,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:23:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:52,892 INFO L225 Difference]: With dead ends: 973 [2020-10-23 18:23:52,892 INFO L226 Difference]: Without dead ends: 970 [2020-10-23 18:23:52,895 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 18:23:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-23 18:23:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 906. [2020-10-23 18:23:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-10-23 18:23:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1112 transitions. [2020-10-23 18:23:52,938 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1112 transitions. Word has length 23 [2020-10-23 18:23:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:52,938 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1112 transitions. [2020-10-23 18:23:52,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1112 transitions. [2020-10-23 18:23:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:23:52,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:52,941 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 18:23:52,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:23:52,941 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:52,942 INFO L82 PathProgramCache]: Analyzing trace with hash -162036165, now seen corresponding path program 1 times [2020-10-23 18:23:52,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:52,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864940360] [2020-10-23 18:23:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:53,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:53,011 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 18:23:53,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864940360] [2020-10-23 18:23:53,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:53,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131591142] [2020-10-23 18:23:53,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:53,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:53,017 INFO L87 Difference]: Start difference. First operand 906 states and 1112 transitions. Second operand 4 states. [2020-10-23 18:23:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:53,161 INFO L93 Difference]: Finished difference Result 1994 states and 2392 transitions. [2020-10-23 18:23:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:53,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:23:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:53,162 INFO L225 Difference]: With dead ends: 1994 [2020-10-23 18:23:53,162 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:23:53,166 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 18:23:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:23:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:23:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:23:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:23:53,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-23 18:23:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:53,168 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:23:53,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:23:53,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:23:53,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:23:53,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:23:54,079 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 32 [2020-10-23 18:23:54,126 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:23:54,127 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:23:54,127 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:23:54,127 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:23:54,127 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:23:54,127 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 18:23:54,128 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:23:54,128 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:23:54,128 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:23:54,128 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:23:54,128 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:23:54,128 INFO L274 CegarLoopResult]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,128 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2020-10-23 18:23:54,128 INFO L274 CegarLoopResult]: For program point L85(line 85) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L274 CegarLoopResult]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L274 CegarLoopResult]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L274 CegarLoopResult]: For program point L95(line 95) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L274 CegarLoopResult]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2020-10-23 18:23:54,129 INFO L274 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-10-23 18:23:54,129 INFO L277 CegarLoopResult]: At program point L105(lines 7 109) the Hoare annotation is: true [2020-10-23 18:23:54,130 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-10-23 18:23:54,130 INFO L274 CegarLoopResult]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,130 INFO L274 CegarLoopResult]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,130 INFO L274 CegarLoopResult]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,130 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-23 18:23:54,131 INFO L274 CegarLoopResult]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,131 INFO L274 CegarLoopResult]: For program point L90(line 90) no Hoare annotation was computed. [2020-10-23 18:23:54,131 INFO L274 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-10-23 18:23:54,132 INFO L274 CegarLoopResult]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,132 INFO L277 CegarLoopResult]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2020-10-23 18:23:54,132 INFO L274 CegarLoopResult]: For program point L75(line 75) no Hoare annotation was computed. [2020-10-23 18:23:54,132 INFO L274 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-10-23 18:23:54,132 INFO L270 CegarLoopResult]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2020-10-23 18:23:54,132 INFO L274 CegarLoopResult]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,132 INFO L274 CegarLoopResult]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2020-10-23 18:23:54,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:23:54 BoogieIcfgContainer [2020-10-23 18:23:54,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:23:54,149 INFO L168 Benchmark]: Toolchain (without parser) took 6329.22 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.3 MB in the beginning and 177.7 MB in the end (delta: -50.4 MB). Peak memory consumption was 121.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:54,149 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:23:54,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.14 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:54,162 INFO L168 Benchmark]: Boogie Preprocessor took 40.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:54,163 INFO L168 Benchmark]: RCFGBuilder took 424.08 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 131.7 MB in the end (delta: -16.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:54,164 INFO L168 Benchmark]: TraceAbstraction took 5578.29 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.2 MB in the beginning and 177.7 MB in the end (delta: -46.5 MB). Peak memory consumption was 122.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:54,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.14 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.73 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 424.08 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 131.7 MB in the end (delta: -16.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5578.29 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.2 MB in the beginning and 177.7 MB in the end (delta: -46.5 MB). Peak memory consumption was 122.3 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: 29]: 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, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 893 SDtfs, 1206 SDslu, 125 SDs, 0 SdLazy, 644 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 254 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 90 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 212294 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 20197 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...