/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:22:52,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:22:52,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:22:52,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:22:52,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:22:52,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:22:52,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:22:52,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:22:52,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:22:52,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:22:52,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:22:52,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 18:22:52,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:22:52,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:22:52,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:22:52,503 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 18:22:52,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:22:52,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:22:52,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:22:52,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:22:52,571 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:22:52,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:22:52,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:22:52,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:22:52,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:22:52,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:22:52,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:22:52,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:22:52,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:22:52,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:22:52,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:22:52,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:22:52,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:22:52,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:22:52,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:22:52,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:22:52,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:22:52,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:22:52,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:22:52,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:22:52,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:22:52,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:22:52,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:22:52,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:22:52,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:22:52,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:22:52,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:22:52,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:22:52,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:22:52,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:22:52,978 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:22:52,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-10-23 18:22:53,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c465e8b/2654099e6cbb4e8ab1d097d426483f10/FLAG8b914530f [2020-10-23 18:22:53,740 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:22:53,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-10-23 18:22:53,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c465e8b/2654099e6cbb4e8ab1d097d426483f10/FLAG8b914530f [2020-10-23 18:22:54,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97c465e8b/2654099e6cbb4e8ab1d097d426483f10 [2020-10-23 18:22:54,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:22:54,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:22:54,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:22:54,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:22:54,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:22:54,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a72641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54, skipping insertion in model container [2020-10-23 18:22:54,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:22:54,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:22:54,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:22:54,393 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:22:54,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:22:54,439 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:22:54,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54 WrapperNode [2020-10-23 18:22:54,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:22:54,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:22:54,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:22:54,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:22:54,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (1/1) ... [2020-10-23 18:22:54,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:22:54,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:22:54,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:22:54,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:22:54,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (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 18:22:54,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:22:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:22:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:22:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:22:54,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:22:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:22:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:22:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:22:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:22:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:22:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:22:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:22:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:22:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:22:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:22:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:22:55,364 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:22:55,364 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:22:55,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:22:55 BoogieIcfgContainer [2020-10-23 18:22:55,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:22:55,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:22:55,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:22:55,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:22:55,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:22:54" (1/3) ... [2020-10-23 18:22:55,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23acda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:22:55, skipping insertion in model container [2020-10-23 18:22:55,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:22:54" (2/3) ... [2020-10-23 18:22:55,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23acda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:22:55, skipping insertion in model container [2020-10-23 18:22:55,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:22:55" (3/3) ... [2020-10-23 18:22:55,379 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-10-23 18:22:55,391 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:22:55,396 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:22:55,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:22:55,436 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:22:55,436 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:22:55,436 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:22:55,436 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:22:55,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:22:55,437 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:22:55,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:22:55,437 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:22:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-23 18:22:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:22:55,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:55,461 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 18:22:55,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:55,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1724318403, now seen corresponding path program 1 times [2020-10-23 18:22:55,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:55,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494168192] [2020-10-23 18:22:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:55,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:55,752 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 18:22:55,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494168192] [2020-10-23 18:22:55,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:55,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:55,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041228735] [2020-10-23 18:22:55,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:55,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:55,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:55,778 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-10-23 18:22:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:56,124 INFO L93 Difference]: Finished difference Result 92 states and 157 transitions. [2020-10-23 18:22:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:56,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:22:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:56,139 INFO L225 Difference]: With dead ends: 92 [2020-10-23 18:22:56,139 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:22:56,142 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 18:22:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:22:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-10-23 18:22:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-23 18:22:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 91 transitions. [2020-10-23 18:22:56,192 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 91 transitions. Word has length 22 [2020-10-23 18:22:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:56,193 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 91 transitions. [2020-10-23 18:22:56,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 91 transitions. [2020-10-23 18:22:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:22:56,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:56,195 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 18:22:56,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:22:56,195 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1559531643, now seen corresponding path program 1 times [2020-10-23 18:22:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:56,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251939401] [2020-10-23 18:22:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:56,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:56,317 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 18:22:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251939401] [2020-10-23 18:22:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375777437] [2020-10-23 18:22:56,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:56,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:56,322 INFO L87 Difference]: Start difference. First operand 52 states and 91 transitions. Second operand 4 states. [2020-10-23 18:22:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:56,552 INFO L93 Difference]: Finished difference Result 119 states and 215 transitions. [2020-10-23 18:22:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:56,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-23 18:22:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:56,555 INFO L225 Difference]: With dead ends: 119 [2020-10-23 18:22:56,555 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:22:56,556 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 18:22:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:22:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-23 18:22:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 18:22:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 127 transitions. [2020-10-23 18:22:56,570 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 127 transitions. Word has length 22 [2020-10-23 18:22:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:56,570 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 127 transitions. [2020-10-23 18:22:56,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 127 transitions. [2020-10-23 18:22:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:22:56,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:56,572 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 18:22:56,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:22:56,572 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:56,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1907654547, now seen corresponding path program 1 times [2020-10-23 18:22:56,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:56,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41384988] [2020-10-23 18:22:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:56,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:56,669 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 18:22:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41384988] [2020-10-23 18:22:56,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:56,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:56,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417882651] [2020-10-23 18:22:56,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:56,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:56,673 INFO L87 Difference]: Start difference. First operand 72 states and 127 transitions. Second operand 4 states. [2020-10-23 18:22:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:56,887 INFO L93 Difference]: Finished difference Result 110 states and 192 transitions. [2020-10-23 18:22:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:56,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:22:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:56,889 INFO L225 Difference]: With dead ends: 110 [2020-10-23 18:22:56,890 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 18:22:56,902 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 18:22:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 18:22:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-23 18:22:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 18:22:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 129 transitions. [2020-10-23 18:22:56,928 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 129 transitions. Word has length 23 [2020-10-23 18:22:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:56,929 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 129 transitions. [2020-10-23 18:22:56,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 129 transitions. [2020-10-23 18:22:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:22:56,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:56,931 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 18:22:56,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:22:56,932 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:56,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1107449071, now seen corresponding path program 1 times [2020-10-23 18:22:56,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:56,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386408351] [2020-10-23 18:22:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:57,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:57,086 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 18:22:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386408351] [2020-10-23 18:22:57,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:57,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:57,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747834900] [2020-10-23 18:22:57,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:57,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:57,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:57,093 INFO L87 Difference]: Start difference. First operand 75 states and 129 transitions. Second operand 4 states. [2020-10-23 18:22:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:57,310 INFO L93 Difference]: Finished difference Result 203 states and 362 transitions. [2020-10-23 18:22:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:57,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:22:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:57,312 INFO L225 Difference]: With dead ends: 203 [2020-10-23 18:22:57,313 INFO L226 Difference]: Without dead ends: 137 [2020-10-23 18:22:57,314 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 18:22:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-23 18:22:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-23 18:22:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-23 18:22:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 238 transitions. [2020-10-23 18:22:57,329 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 238 transitions. Word has length 23 [2020-10-23 18:22:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:57,330 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 238 transitions. [2020-10-23 18:22:57,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 238 transitions. [2020-10-23 18:22:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:22:57,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:57,332 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 18:22:57,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:22:57,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2118566321, now seen corresponding path program 1 times [2020-10-23 18:22:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:57,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228849774] [2020-10-23 18:22:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:57,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:57,403 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 18:22:57,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228849774] [2020-10-23 18:22:57,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:57,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405758927] [2020-10-23 18:22:57,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:57,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:57,406 INFO L87 Difference]: Start difference. First operand 136 states and 238 transitions. Second operand 4 states. [2020-10-23 18:22:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:57,575 INFO L93 Difference]: Finished difference Result 176 states and 309 transitions. [2020-10-23 18:22:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:57,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-23 18:22:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:57,577 INFO L225 Difference]: With dead ends: 176 [2020-10-23 18:22:57,577 INFO L226 Difference]: Without dead ends: 173 [2020-10-23 18:22:57,578 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 18:22:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-23 18:22:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2020-10-23 18:22:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-23 18:22:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 236 transitions. [2020-10-23 18:22:57,590 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 236 transitions. Word has length 23 [2020-10-23 18:22:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:57,591 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 236 transitions. [2020-10-23 18:22:57,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:57,591 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 236 transitions. [2020-10-23 18:22:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:22:57,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:57,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:57,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:22:57,593 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -22198202, now seen corresponding path program 1 times [2020-10-23 18:22:57,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:57,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84339531] [2020-10-23 18:22:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:57,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:57,655 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 18:22:57,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84339531] [2020-10-23 18:22:57,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:57,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400949717] [2020-10-23 18:22:57,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:57,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:57,658 INFO L87 Difference]: Start difference. First operand 136 states and 236 transitions. Second operand 4 states. [2020-10-23 18:22:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:57,829 INFO L93 Difference]: Finished difference Result 252 states and 445 transitions. [2020-10-23 18:22:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:57,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:22:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:57,832 INFO L225 Difference]: With dead ends: 252 [2020-10-23 18:22:57,832 INFO L226 Difference]: Without dead ends: 249 [2020-10-23 18:22:57,833 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 18:22:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-23 18:22:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 184. [2020-10-23 18:22:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-23 18:22:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 318 transitions. [2020-10-23 18:22:57,846 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 318 transitions. Word has length 24 [2020-10-23 18:22:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:57,846 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 318 transitions. [2020-10-23 18:22:57,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 318 transitions. [2020-10-23 18:22:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:22:57,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:57,849 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, 1, 1, 1, 1] [2020-10-23 18:22:57,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:22:57,849 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1033315452, now seen corresponding path program 1 times [2020-10-23 18:22:57,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:57,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376193394] [2020-10-23 18:22:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,021 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-23 18:22:58,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,040 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 18:22:58,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376193394] [2020-10-23 18:22:58,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:58,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684661477] [2020-10-23 18:22:58,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:58,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:58,045 INFO L87 Difference]: Start difference. First operand 184 states and 318 transitions. Second operand 4 states. [2020-10-23 18:22:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:58,240 INFO L93 Difference]: Finished difference Result 432 states and 757 transitions. [2020-10-23 18:22:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:58,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-23 18:22:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:58,242 INFO L225 Difference]: With dead ends: 432 [2020-10-23 18:22:58,243 INFO L226 Difference]: Without dead ends: 257 [2020-10-23 18:22:58,244 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 18:22:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-23 18:22:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2020-10-23 18:22:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-23 18:22:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 440 transitions. [2020-10-23 18:22:58,259 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 440 transitions. Word has length 24 [2020-10-23 18:22:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:58,259 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 440 transitions. [2020-10-23 18:22:58,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 440 transitions. [2020-10-23 18:22:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:22:58,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:58,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:58,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:22:58,262 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash -681514726, now seen corresponding path program 1 times [2020-10-23 18:22:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:58,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184531067] [2020-10-23 18:22:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,350 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 18:22:58,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184531067] [2020-10-23 18:22:58,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:58,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:58,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567887996] [2020-10-23 18:22:58,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:58,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:58,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:58,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:58,355 INFO L87 Difference]: Start difference. First operand 256 states and 440 transitions. Second operand 4 states. [2020-10-23 18:22:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:58,535 INFO L93 Difference]: Finished difference Result 386 states and 663 transitions. [2020-10-23 18:22:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:58,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:22:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:58,538 INFO L225 Difference]: With dead ends: 386 [2020-10-23 18:22:58,538 INFO L226 Difference]: Without dead ends: 263 [2020-10-23 18:22:58,539 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 18:22:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-23 18:22:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2020-10-23 18:22:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-23 18:22:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 444 transitions. [2020-10-23 18:22:58,552 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 444 transitions. Word has length 25 [2020-10-23 18:22:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:58,552 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 444 transitions. [2020-10-23 18:22:58,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 444 transitions. [2020-10-23 18:22:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:22:58,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:58,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:58,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:22:58,555 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1961378404, now seen corresponding path program 1 times [2020-10-23 18:22:58,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:58,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876703363] [2020-10-23 18:22:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,615 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 18:22:58,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876703363] [2020-10-23 18:22:58,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:58,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:58,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717323255] [2020-10-23 18:22:58,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:58,617 INFO L87 Difference]: Start difference. First operand 262 states and 444 transitions. Second operand 4 states. [2020-10-23 18:22:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:58,792 INFO L93 Difference]: Finished difference Result 478 states and 823 transitions. [2020-10-23 18:22:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:58,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:22:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:58,796 INFO L225 Difference]: With dead ends: 478 [2020-10-23 18:22:58,796 INFO L226 Difference]: Without dead ends: 475 [2020-10-23 18:22:58,797 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 18:22:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-23 18:22:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 362. [2020-10-23 18:22:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-23 18:22:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 604 transitions. [2020-10-23 18:22:58,827 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 604 transitions. Word has length 25 [2020-10-23 18:22:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:58,827 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 604 transitions. [2020-10-23 18:22:58,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 604 transitions. [2020-10-23 18:22:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:22:58,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:58,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:58,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:22:58,830 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:58,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1322471642, now seen corresponding path program 1 times [2020-10-23 18:22:58,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:58,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258300368] [2020-10-23 18:22:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:58,891 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 18:22:58,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258300368] [2020-10-23 18:22:58,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:58,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:58,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883218058] [2020-10-23 18:22:58,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:58,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:58,893 INFO L87 Difference]: Start difference. First operand 362 states and 604 transitions. Second operand 4 states. [2020-10-23 18:22:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:59,098 INFO L93 Difference]: Finished difference Result 846 states and 1423 transitions. [2020-10-23 18:22:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:59,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-23 18:22:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:59,101 INFO L225 Difference]: With dead ends: 846 [2020-10-23 18:22:59,101 INFO L226 Difference]: Without dead ends: 499 [2020-10-23 18:22:59,103 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 18:22:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-23 18:22:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 498. [2020-10-23 18:22:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-23 18:22:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 824 transitions. [2020-10-23 18:22:59,124 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 824 transitions. Word has length 25 [2020-10-23 18:22:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:59,125 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 824 transitions. [2020-10-23 18:22:59,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 824 transitions. [2020-10-23 18:22:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:22:59,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:59,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:59,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:22:59,128 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash -666548273, now seen corresponding path program 1 times [2020-10-23 18:22:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:59,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226410562] [2020-10-23 18:22:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:59,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:59,229 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 18:22:59,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226410562] [2020-10-23 18:22:59,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:59,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837476007] [2020-10-23 18:22:59,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:59,231 INFO L87 Difference]: Start difference. First operand 498 states and 824 transitions. Second operand 4 states. [2020-10-23 18:22:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:59,394 INFO L93 Difference]: Finished difference Result 746 states and 1231 transitions. [2020-10-23 18:22:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:59,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:22:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:59,398 INFO L225 Difference]: With dead ends: 746 [2020-10-23 18:22:59,398 INFO L226 Difference]: Without dead ends: 507 [2020-10-23 18:22:59,399 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 18:22:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-23 18:22:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 506. [2020-10-23 18:22:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-23 18:22:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 824 transitions. [2020-10-23 18:22:59,423 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 824 transitions. Word has length 26 [2020-10-23 18:22:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:59,423 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 824 transitions. [2020-10-23 18:22:59,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 824 transitions. [2020-10-23 18:22:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:22:59,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:59,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:59,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 18:22:59,425 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1946411951, now seen corresponding path program 1 times [2020-10-23 18:22:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726093452] [2020-10-23 18:22:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:59,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:59,487 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 18:22:59,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726093452] [2020-10-23 18:22:59,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:59,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:59,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419567854] [2020-10-23 18:22:59,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:59,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:59,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:59,490 INFO L87 Difference]: Start difference. First operand 506 states and 824 transitions. Second operand 4 states. [2020-10-23 18:22:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:22:59,700 INFO L93 Difference]: Finished difference Result 910 states and 1507 transitions. [2020-10-23 18:22:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:22:59,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:22:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:22:59,708 INFO L225 Difference]: With dead ends: 910 [2020-10-23 18:22:59,708 INFO L226 Difference]: Without dead ends: 907 [2020-10-23 18:22:59,709 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 18:22:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-10-23 18:22:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 714. [2020-10-23 18:22:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-10-23 18:22:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1136 transitions. [2020-10-23 18:22:59,743 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1136 transitions. Word has length 26 [2020-10-23 18:22:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:22:59,743 INFO L481 AbstractCegarLoop]: Abstraction has 714 states and 1136 transitions. [2020-10-23 18:22:59,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:22:59,743 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1136 transitions. [2020-10-23 18:22:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:22:59,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:22:59,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:22:59,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:22:59,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:22:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:22:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1337438095, now seen corresponding path program 1 times [2020-10-23 18:22:59,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:22:59,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251900883] [2020-10-23 18:22:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:22:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:59,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:22:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:22:59,814 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 18:22:59,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251900883] [2020-10-23 18:22:59,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:22:59,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:22:59,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614161603] [2020-10-23 18:22:59,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:22:59,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:22:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:22:59,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:22:59,818 INFO L87 Difference]: Start difference. First operand 714 states and 1136 transitions. Second operand 4 states. [2020-10-23 18:23:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:00,002 INFO L93 Difference]: Finished difference Result 1662 states and 2659 transitions. [2020-10-23 18:23:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:00,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-23 18:23:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:00,008 INFO L225 Difference]: With dead ends: 1662 [2020-10-23 18:23:00,008 INFO L226 Difference]: Without dead ends: 971 [2020-10-23 18:23:00,010 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 18:23:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2020-10-23 18:23:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 970. [2020-10-23 18:23:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-10-23 18:23:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1528 transitions. [2020-10-23 18:23:00,049 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1528 transitions. Word has length 26 [2020-10-23 18:23:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:00,049 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1528 transitions. [2020-10-23 18:23:00,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1528 transitions. [2020-10-23 18:23:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:23:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:00,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:00,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 18:23:00,051 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash -202577659, now seen corresponding path program 1 times [2020-10-23 18:23:00,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:00,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136912306] [2020-10-23 18:23:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:00,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:00,105 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 18:23:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136912306] [2020-10-23 18:23:00,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:00,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:00,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862027921] [2020-10-23 18:23:00,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:00,107 INFO L87 Difference]: Start difference. First operand 970 states and 1528 transitions. Second operand 4 states. [2020-10-23 18:23:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:00,311 INFO L93 Difference]: Finished difference Result 1454 states and 2283 transitions. [2020-10-23 18:23:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:00,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:23:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:00,317 INFO L225 Difference]: With dead ends: 1454 [2020-10-23 18:23:00,317 INFO L226 Difference]: Without dead ends: 987 [2020-10-23 18:23:00,319 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 18:23:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-10-23 18:23:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 986. [2020-10-23 18:23:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 986 states. [2020-10-23 18:23:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1528 transitions. [2020-10-23 18:23:00,361 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1528 transitions. Word has length 27 [2020-10-23 18:23:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:00,362 INFO L481 AbstractCegarLoop]: Abstraction has 986 states and 1528 transitions. [2020-10-23 18:23:00,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1528 transitions. [2020-10-23 18:23:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:23:00,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:00,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:00,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:23:00,365 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:00,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1482441337, now seen corresponding path program 1 times [2020-10-23 18:23:00,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:00,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896800274] [2020-10-23 18:23:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:00,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:00,445 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 18:23:00,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896800274] [2020-10-23 18:23:00,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:00,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:00,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946487723] [2020-10-23 18:23:00,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:00,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:00,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:00,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:00,448 INFO L87 Difference]: Start difference. First operand 986 states and 1528 transitions. Second operand 4 states. [2020-10-23 18:23:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:00,647 INFO L93 Difference]: Finished difference Result 1742 states and 2747 transitions. [2020-10-23 18:23:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:00,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:23:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:00,656 INFO L225 Difference]: With dead ends: 1742 [2020-10-23 18:23:00,657 INFO L226 Difference]: Without dead ends: 1739 [2020-10-23 18:23:00,660 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 18:23:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2020-10-23 18:23:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1418. [2020-10-23 18:23:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2020-10-23 18:23:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2136 transitions. [2020-10-23 18:23:00,718 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2136 transitions. Word has length 27 [2020-10-23 18:23:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:00,718 INFO L481 AbstractCegarLoop]: Abstraction has 1418 states and 2136 transitions. [2020-10-23 18:23:00,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2136 transitions. [2020-10-23 18:23:00,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:23:00,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:00,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:00,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:23:00,722 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1801408709, now seen corresponding path program 1 times [2020-10-23 18:23:00,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:00,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163966586] [2020-10-23 18:23:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:00,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:00,793 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 18:23:00,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163966586] [2020-10-23 18:23:00,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:00,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129064451] [2020-10-23 18:23:00,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:00,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:00,798 INFO L87 Difference]: Start difference. First operand 1418 states and 2136 transitions. Second operand 4 states. [2020-10-23 18:23:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:00,997 INFO L93 Difference]: Finished difference Result 3278 states and 4955 transitions. [2020-10-23 18:23:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:00,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:23:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:01,006 INFO L225 Difference]: With dead ends: 3278 [2020-10-23 18:23:01,006 INFO L226 Difference]: Without dead ends: 1899 [2020-10-23 18:23:01,009 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 18:23:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2020-10-23 18:23:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1898. [2020-10-23 18:23:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1898 states. [2020-10-23 18:23:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2824 transitions. [2020-10-23 18:23:01,110 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2824 transitions. Word has length 27 [2020-10-23 18:23:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:01,111 INFO L481 AbstractCegarLoop]: Abstraction has 1898 states and 2824 transitions. [2020-10-23 18:23:01,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2824 transitions. [2020-10-23 18:23:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:23:01,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:01,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:01,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:23:01,114 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:01,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1295620058, now seen corresponding path program 1 times [2020-10-23 18:23:01,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:01,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508970204] [2020-10-23 18:23:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:01,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:01,190 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 18:23:01,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508970204] [2020-10-23 18:23:01,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:01,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73901330] [2020-10-23 18:23:01,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:01,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:01,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:01,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:01,197 INFO L87 Difference]: Start difference. First operand 1898 states and 2824 transitions. Second operand 4 states. [2020-10-23 18:23:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:01,379 INFO L93 Difference]: Finished difference Result 2846 states and 4219 transitions. [2020-10-23 18:23:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:01,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:23:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:01,389 INFO L225 Difference]: With dead ends: 2846 [2020-10-23 18:23:01,390 INFO L226 Difference]: Without dead ends: 1931 [2020-10-23 18:23:01,392 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 18:23:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2020-10-23 18:23:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1930. [2020-10-23 18:23:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-23 18:23:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2824 transitions. [2020-10-23 18:23:01,460 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2824 transitions. Word has length 28 [2020-10-23 18:23:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:01,461 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 2824 transitions. [2020-10-23 18:23:01,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2824 transitions. [2020-10-23 18:23:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:23:01,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:01,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:01,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 18:23:01,464 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash 15756380, now seen corresponding path program 1 times [2020-10-23 18:23:01,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:01,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786384553] [2020-10-23 18:23:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:01,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:01,522 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 18:23:01,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786384553] [2020-10-23 18:23:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:01,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937628012] [2020-10-23 18:23:01,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:01,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:01,527 INFO L87 Difference]: Start difference. First operand 1930 states and 2824 transitions. Second operand 4 states. [2020-10-23 18:23:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:01,758 INFO L93 Difference]: Finished difference Result 3342 states and 4971 transitions. [2020-10-23 18:23:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:01,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:23:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:01,773 INFO L225 Difference]: With dead ends: 3342 [2020-10-23 18:23:01,773 INFO L226 Difference]: Without dead ends: 3339 [2020-10-23 18:23:01,775 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 18:23:01,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2020-10-23 18:23:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2826. [2020-10-23 18:23:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2826 states. [2020-10-23 18:23:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 4008 transitions. [2020-10-23 18:23:01,888 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 4008 transitions. Word has length 28 [2020-10-23 18:23:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:01,888 INFO L481 AbstractCegarLoop]: Abstraction has 2826 states and 4008 transitions. [2020-10-23 18:23:01,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 4008 transitions. [2020-10-23 18:23:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:23:01,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:01,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:01,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 18:23:01,893 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash -995360870, now seen corresponding path program 1 times [2020-10-23 18:23:01,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:01,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407084882] [2020-10-23 18:23:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:01,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:01,951 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 18:23:01,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407084882] [2020-10-23 18:23:01,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:01,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:01,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431224930] [2020-10-23 18:23:01,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:01,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:01,954 INFO L87 Difference]: Start difference. First operand 2826 states and 4008 transitions. Second operand 4 states. [2020-10-23 18:23:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:02,178 INFO L93 Difference]: Finished difference Result 6478 states and 9195 transitions. [2020-10-23 18:23:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:02,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-23 18:23:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:02,195 INFO L225 Difference]: With dead ends: 6478 [2020-10-23 18:23:02,196 INFO L226 Difference]: Without dead ends: 3723 [2020-10-23 18:23:02,203 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 18:23:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2020-10-23 18:23:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3722. [2020-10-23 18:23:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3722 states. [2020-10-23 18:23:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5192 transitions. [2020-10-23 18:23:02,382 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5192 transitions. Word has length 28 [2020-10-23 18:23:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:02,382 INFO L481 AbstractCegarLoop]: Abstraction has 3722 states and 5192 transitions. [2020-10-23 18:23:02,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5192 transitions. [2020-10-23 18:23:02,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:23:02,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:02,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:02,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 18:23:02,388 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash 495119600, now seen corresponding path program 1 times [2020-10-23 18:23:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:02,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687260451] [2020-10-23 18:23:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:02,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:02,446 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 18:23:02,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687260451] [2020-10-23 18:23:02,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:02,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:02,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098190273] [2020-10-23 18:23:02,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:02,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:02,448 INFO L87 Difference]: Start difference. First operand 3722 states and 5192 transitions. Second operand 4 states. [2020-10-23 18:23:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:02,657 INFO L93 Difference]: Finished difference Result 5582 states and 7755 transitions. [2020-10-23 18:23:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:02,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:23:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:02,674 INFO L225 Difference]: With dead ends: 5582 [2020-10-23 18:23:02,675 INFO L226 Difference]: Without dead ends: 3787 [2020-10-23 18:23:02,680 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 18:23:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2020-10-23 18:23:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3786. [2020-10-23 18:23:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3786 states. [2020-10-23 18:23:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 5192 transitions. [2020-10-23 18:23:02,863 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 5192 transitions. Word has length 29 [2020-10-23 18:23:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:02,864 INFO L481 AbstractCegarLoop]: Abstraction has 3786 states and 5192 transitions. [2020-10-23 18:23:02,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 5192 transitions. [2020-10-23 18:23:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:23:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:02,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:02,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 18:23:02,872 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -784744078, now seen corresponding path program 1 times [2020-10-23 18:23:02,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:02,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356157659] [2020-10-23 18:23:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:02,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:02,936 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 18:23:02,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356157659] [2020-10-23 18:23:02,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:02,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927765458] [2020-10-23 18:23:02,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:02,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:02,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:02,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:02,940 INFO L87 Difference]: Start difference. First operand 3786 states and 5192 transitions. Second operand 4 states. [2020-10-23 18:23:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:03,202 INFO L93 Difference]: Finished difference Result 6414 states and 8907 transitions. [2020-10-23 18:23:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:03,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:23:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:03,246 INFO L225 Difference]: With dead ends: 6414 [2020-10-23 18:23:03,246 INFO L226 Difference]: Without dead ends: 6411 [2020-10-23 18:23:03,249 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 18:23:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2020-10-23 18:23:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5642. [2020-10-23 18:23:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5642 states. [2020-10-23 18:23:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7496 transitions. [2020-10-23 18:23:03,452 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7496 transitions. Word has length 29 [2020-10-23 18:23:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:03,453 INFO L481 AbstractCegarLoop]: Abstraction has 5642 states and 7496 transitions. [2020-10-23 18:23:03,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7496 transitions. [2020-10-23 18:23:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:23:03,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:03,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:03,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:23:03,462 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:03,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1795861328, now seen corresponding path program 1 times [2020-10-23 18:23:03,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:03,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461420291] [2020-10-23 18:23:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:03,524 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 18:23:03,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461420291] [2020-10-23 18:23:03,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:03,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:03,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166207033] [2020-10-23 18:23:03,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:03,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:03,530 INFO L87 Difference]: Start difference. First operand 5642 states and 7496 transitions. Second operand 4 states. [2020-10-23 18:23:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:03,809 INFO L93 Difference]: Finished difference Result 12814 states and 16971 transitions. [2020-10-23 18:23:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:03,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-23 18:23:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:03,825 INFO L225 Difference]: With dead ends: 12814 [2020-10-23 18:23:03,825 INFO L226 Difference]: Without dead ends: 7307 [2020-10-23 18:23:03,838 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 18:23:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2020-10-23 18:23:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7306. [2020-10-23 18:23:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7306 states. [2020-10-23 18:23:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 9480 transitions. [2020-10-23 18:23:04,122 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 9480 transitions. Word has length 29 [2020-10-23 18:23:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:04,125 INFO L481 AbstractCegarLoop]: Abstraction has 7306 states and 9480 transitions. [2020-10-23 18:23:04,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 9480 transitions. [2020-10-23 18:23:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:23:04,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:04,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:04,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 18:23:04,136 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1449419749, now seen corresponding path program 1 times [2020-10-23 18:23:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:04,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542133227] [2020-10-23 18:23:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:04,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:04,209 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 18:23:04,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542133227] [2020-10-23 18:23:04,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:04,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:04,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100823765] [2020-10-23 18:23:04,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:04,215 INFO L87 Difference]: Start difference. First operand 7306 states and 9480 transitions. Second operand 4 states. [2020-10-23 18:23:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:04,473 INFO L93 Difference]: Finished difference Result 10958 states and 14155 transitions. [2020-10-23 18:23:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:04,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:23:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:04,487 INFO L225 Difference]: With dead ends: 10958 [2020-10-23 18:23:04,487 INFO L226 Difference]: Without dead ends: 7435 [2020-10-23 18:23:04,497 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 18:23:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2020-10-23 18:23:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7434. [2020-10-23 18:23:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7434 states. [2020-10-23 18:23:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 9480 transitions. [2020-10-23 18:23:04,754 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 9480 transitions. Word has length 30 [2020-10-23 18:23:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:04,754 INFO L481 AbstractCegarLoop]: Abstraction has 7434 states and 9480 transitions. [2020-10-23 18:23:04,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 9480 transitions. [2020-10-23 18:23:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:23:04,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:04,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:04,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 18:23:04,764 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 169556071, now seen corresponding path program 1 times [2020-10-23 18:23:04,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:04,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51605851] [2020-10-23 18:23:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:04,817 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 18:23:04,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51605851] [2020-10-23 18:23:04,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:04,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264910488] [2020-10-23 18:23:04,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:04,819 INFO L87 Difference]: Start difference. First operand 7434 states and 9480 transitions. Second operand 4 states. [2020-10-23 18:23:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:05,218 INFO L93 Difference]: Finished difference Result 12302 states and 15755 transitions. [2020-10-23 18:23:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:05,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:23:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:05,243 INFO L225 Difference]: With dead ends: 12302 [2020-10-23 18:23:05,244 INFO L226 Difference]: Without dead ends: 12299 [2020-10-23 18:23:05,247 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 18:23:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2020-10-23 18:23:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11274. [2020-10-23 18:23:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11274 states. [2020-10-23 18:23:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 13960 transitions. [2020-10-23 18:23:05,566 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 13960 transitions. Word has length 30 [2020-10-23 18:23:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:05,567 INFO L481 AbstractCegarLoop]: Abstraction has 11274 states and 13960 transitions. [2020-10-23 18:23:05,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 13960 transitions. [2020-10-23 18:23:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:23:05,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:05,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:05,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 18:23:05,585 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash -841561179, now seen corresponding path program 1 times [2020-10-23 18:23:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:05,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427421238] [2020-10-23 18:23:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:05,656 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 18:23:05,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427421238] [2020-10-23 18:23:05,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:05,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196810597] [2020-10-23 18:23:05,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:05,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:05,659 INFO L87 Difference]: Start difference. First operand 11274 states and 13960 transitions. Second operand 4 states. [2020-10-23 18:23:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:06,086 INFO L93 Difference]: Finished difference Result 25358 states and 31115 transitions. [2020-10-23 18:23:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:06,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:23:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:06,112 INFO L225 Difference]: With dead ends: 25358 [2020-10-23 18:23:06,112 INFO L226 Difference]: Without dead ends: 14347 [2020-10-23 18:23:06,132 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 18:23:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2020-10-23 18:23:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14346. [2020-10-23 18:23:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14346 states. [2020-10-23 18:23:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14346 states to 14346 states and 17160 transitions. [2020-10-23 18:23:06,692 INFO L78 Accepts]: Start accepts. Automaton has 14346 states and 17160 transitions. Word has length 30 [2020-10-23 18:23:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:06,692 INFO L481 AbstractCegarLoop]: Abstraction has 14346 states and 17160 transitions. [2020-10-23 18:23:06,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14346 states and 17160 transitions. [2020-10-23 18:23:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:23:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:06,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:06,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 18:23:06,708 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 967963867, now seen corresponding path program 1 times [2020-10-23 18:23:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186522413] [2020-10-23 18:23:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:06,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:06,753 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 18:23:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186522413] [2020-10-23 18:23:06,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:06,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766309365] [2020-10-23 18:23:06,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:06,755 INFO L87 Difference]: Start difference. First operand 14346 states and 17160 transitions. Second operand 4 states. [2020-10-23 18:23:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:07,105 INFO L93 Difference]: Finished difference Result 21518 states and 25611 transitions. [2020-10-23 18:23:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:07,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:23:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:07,133 INFO L225 Difference]: With dead ends: 21518 [2020-10-23 18:23:07,134 INFO L226 Difference]: Without dead ends: 14603 [2020-10-23 18:23:07,150 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 18:23:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2020-10-23 18:23:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14602. [2020-10-23 18:23:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14602 states. [2020-10-23 18:23:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 17160 transitions. [2020-10-23 18:23:07,697 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 17160 transitions. Word has length 31 [2020-10-23 18:23:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 14602 states and 17160 transitions. [2020-10-23 18:23:07,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 17160 transitions. [2020-10-23 18:23:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:23:07,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:07,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:07,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 18:23:07,713 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -311899811, now seen corresponding path program 1 times [2020-10-23 18:23:07,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:07,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210983390] [2020-10-23 18:23:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:07,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:07,760 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 18:23:07,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210983390] [2020-10-23 18:23:07,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:07,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:07,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109953477] [2020-10-23 18:23:07,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:07,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:07,762 INFO L87 Difference]: Start difference. First operand 14602 states and 17160 transitions. Second operand 4 states. [2020-10-23 18:23:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:08,446 INFO L93 Difference]: Finished difference Result 42253 states and 48394 transitions. [2020-10-23 18:23:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:08,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:23:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:08,477 INFO L225 Difference]: With dead ends: 42253 [2020-10-23 18:23:08,477 INFO L226 Difference]: Without dead ends: 14602 [2020-10-23 18:23:08,522 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 18:23:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-10-23 18:23:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14602. [2020-10-23 18:23:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14602 states. [2020-10-23 18:23:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 16136 transitions. [2020-10-23 18:23:09,029 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 16136 transitions. Word has length 31 [2020-10-23 18:23:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:09,029 INFO L481 AbstractCegarLoop]: Abstraction has 14602 states and 16136 transitions. [2020-10-23 18:23:09,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 16136 transitions. [2020-10-23 18:23:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:23:09,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:23:09,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:23:09,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 18:23:09,046 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:23:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:23:09,047 INFO L82 PathProgramCache]: Analyzing trace with hash 699217439, now seen corresponding path program 1 times [2020-10-23 18:23:09,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:23:09,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426790644] [2020-10-23 18:23:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:23:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:09,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:23:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:23:09,103 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 18:23:09,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426790644] [2020-10-23 18:23:09,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:23:09,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:23:09,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941887536] [2020-10-23 18:23:09,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:23:09,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:23:09,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:23:09,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:23:09,105 INFO L87 Difference]: Start difference. First operand 14602 states and 16136 transitions. Second operand 4 states. [2020-10-23 18:23:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:23:09,388 INFO L93 Difference]: Finished difference Result 14602 states and 16136 transitions. [2020-10-23 18:23:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:23:09,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-23 18:23:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:23:09,389 INFO L225 Difference]: With dead ends: 14602 [2020-10-23 18:23:09,389 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:23:09,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 18:23:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:23:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:23:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:23:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:23:09,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-23 18:23:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:23:09,409 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:23:09,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:23:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:23:09,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:23:09,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 18:23:09,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:23:28,517 WARN L193 SmtUtils]: Spent 19.05 s on a formula simplification. DAG size of input: 2637 DAG size of output: 32 [2020-10-23 18:23:28,562 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:23:28,563 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:23:28,563 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:23:28,563 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:23:28,563 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:23:28,563 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 18:23:28,563 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:23:28,563 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:23:28,564 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 165) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-10-23 18:23:28,564 INFO L274 CegarLoopResult]: For program point L136(line 136) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L277 CegarLoopResult]: At program point L161(lines 7 165) the Hoare annotation is: true [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 165) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 165) the Hoare annotation is: true [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,565 INFO L274 CegarLoopResult]: For program point L146(line 146) no Hoare annotation was computed. [2020-10-23 18:23:28,566 INFO L274 CegarLoopResult]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,566 INFO L274 CegarLoopResult]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,566 INFO L274 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-10-23 18:23:28,566 INFO L274 CegarLoopResult]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,567 INFO L277 CegarLoopResult]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2020-10-23 18:23:28,567 INFO L274 CegarLoopResult]: For program point L131(line 131) no Hoare annotation was computed. [2020-10-23 18:23:28,567 INFO L274 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-10-23 18:23:28,567 INFO L270 CegarLoopResult]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2020-10-23 18:23:28,568 INFO L274 CegarLoopResult]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,568 INFO L274 CegarLoopResult]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,568 INFO L274 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-10-23 18:23:28,568 INFO L274 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-10-23 18:23:28,568 INFO L274 CegarLoopResult]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,568 INFO L274 CegarLoopResult]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L68(lines 68 70) no Hoare annotation was computed. [2020-10-23 18:23:28,569 INFO L274 CegarLoopResult]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2020-10-23 18:23:28,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:23:28 BoogieIcfgContainer [2020-10-23 18:23:28,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:23:28,587 INFO L168 Benchmark]: Toolchain (without parser) took 34481.40 ms. Allocated memory was 155.2 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 112.7 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2020-10-23 18:23:28,590 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 155.2 MB. Free memory is still 128.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:23:28,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.85 ms. Allocated memory is still 155.2 MB. Free memory was 112.1 MB in the beginning and 101.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:28,594 INFO L168 Benchmark]: Boogie Preprocessor took 115.10 ms. Allocated memory is still 155.2 MB. Free memory was 101.9 MB in the beginning and 138.0 MB in the end (delta: -36.1 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:28,594 INFO L168 Benchmark]: RCFGBuilder took 809.49 ms. Allocated memory is still 155.2 MB. Free memory was 138.0 MB in the beginning and 117.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:23:28,595 INFO L168 Benchmark]: TraceAbstraction took 33213.68 ms. Allocated memory was 155.2 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 117.0 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2020-10-23 18:23:28,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 155.2 MB. Free memory is still 128.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.85 ms. Allocated memory is still 155.2 MB. Free memory was 112.1 MB in the beginning and 101.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 115.10 ms. Allocated memory is still 155.2 MB. Free memory was 101.9 MB in the beginning and 138.0 MB in the end (delta: -36.1 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 809.49 ms. Allocated memory is still 155.2 MB. Free memory was 138.0 MB in the beginning and 117.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33213.68 ms. Allocated memory was 155.2 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 117.0 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. 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: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.9s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 19.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2385 SDtfs, 3517 SDslu, 217 SDs, 0 SdLazy, 1707 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14602occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 3074 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 35 PreInvPairs, 1062 NumberOfFragments, 38 HoareAnnotationTreeSize, 35 FomulaSimplifications, 27454566 FormulaSimplificationTreeSizeReduction, 19.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 749 NumberOfCodeBlocks, 749 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 721 ConstructedInterpolants, 0 QuantifiedInterpolants, 57455 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...