/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:01:30,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:01:30,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:01:30,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 07:01:30,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:01:30,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:01:30,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:01:30,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:01:30,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:01:30,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:01:31,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:01:31,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:01:31,004 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:01:31,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:01:31,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:01:31,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:01:31,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:01:31,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:01:31,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:01:31,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:01:31,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:01:31,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:01:31,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:01:31,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:01:31,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:01:31,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:01:31,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:01:31,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:01:31,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:01:31,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:01:31,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:01:31,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:01:31,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:01:31,010 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:01:31,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:01:31,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:01:31,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:01:31,511 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:01:31,512 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:01:31,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono5_1.c [2020-12-23 07:01:31,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8d2dfce7/3ad97d369e7e453a963c51137c5c596b/FLAG3f211f7f1 [2020-12-23 07:01:32,274 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:01:32,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono5_1.c [2020-12-23 07:01:32,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8d2dfce7/3ad97d369e7e453a963c51137c5c596b/FLAG3f211f7f1 [2020-12-23 07:01:32,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8d2dfce7/3ad97d369e7e453a963c51137c5c596b [2020-12-23 07:01:32,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:01:32,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:01:32,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:01:32,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:01:32,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:01:32,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed7dd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32, skipping insertion in model container [2020-12-23 07:01:32,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:01:32,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:01:32,841 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono5_1.c[311,324] [2020-12-23 07:01:32,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:01:32,875 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:01:32,893 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono5_1.c[311,324] [2020-12-23 07:01:32,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:01:32,923 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:01:32,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32 WrapperNode [2020-12-23 07:01:32,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:01:32,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:01:32,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:01:32,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:01:32,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:01:32,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:01:32,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:01:32,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:01:32,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:32,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:33,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:33,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... [2020-12-23 07:01:33,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:01:33,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:01:33,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:01:33,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:01:33,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:01:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:01:33,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:01:33,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:01:33,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:01:33,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:01:33,561 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 07:01:33,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:01:33 BoogieIcfgContainer [2020-12-23 07:01:33,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:01:33,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:01:33,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:01:33,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:01:33,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:01:32" (1/3) ... [2020-12-23 07:01:33,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4806f3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:01:33, skipping insertion in model container [2020-12-23 07:01:33,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:01:32" (2/3) ... [2020-12-23 07:01:33,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4806f3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:01:33, skipping insertion in model container [2020-12-23 07:01:33,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:01:33" (3/3) ... [2020-12-23 07:01:33,576 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2020-12-23 07:01:33,584 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:01:33,588 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 07:01:33,609 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 07:01:33,639 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:01:33,640 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:01:33,640 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:01:33,640 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:01:33,640 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:01:33,640 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:01:33,641 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:01:33,641 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:01:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 07:01:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:01:33,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:33,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:01:33,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2020-12-23 07:01:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:33,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953334633] [2020-12-23 07:01:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953334633] [2020-12-23 07:01:33,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:01:33,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:01:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247478763] [2020-12-23 07:01:33,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:01:33,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:33,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:01:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:01:33,890 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-23 07:01:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:33,932 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-23 07:01:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:01:33,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 07:01:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:33,964 INFO L225 Difference]: With dead ends: 19 [2020-12-23 07:01:33,964 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 07:01:33,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:01:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 07:01:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 07:01:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 07:01:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-23 07:01:34,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-23 07:01:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:34,042 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-23 07:01:34,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:01:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-23 07:01:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:01:34,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:34,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:01:34,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:01:34,045 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2020-12-23 07:01:34,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:34,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529817775] [2020-12-23 07:01:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:34,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529817775] [2020-12-23 07:01:34,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:01:34,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:01:34,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561501734] [2020-12-23 07:01:34,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:01:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:01:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:01:34,343 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2020-12-23 07:01:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:34,386 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-23 07:01:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:01:34,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:01:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:34,388 INFO L225 Difference]: With dead ends: 16 [2020-12-23 07:01:34,388 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 07:01:34,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:01:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 07:01:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 07:01:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 07:01:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 07:01:34,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2020-12-23 07:01:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:34,394 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 07:01:34,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:01:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 07:01:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:01:34,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:34,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:34,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:01:34,396 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2020-12-23 07:01:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:34,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253721411] [2020-12-23 07:01:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:34,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253721411] [2020-12-23 07:01:34,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:01:34,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:01:34,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267674861] [2020-12-23 07:01:34,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:01:34,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:01:34,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:01:34,462 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-12-23 07:01:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:34,482 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 07:01:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:01:34,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 07:01:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:34,484 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:01:34,484 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:01:34,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:01:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:01:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-23 07:01:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 07:01:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 07:01:34,528 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2020-12-23 07:01:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:34,543 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 07:01:34,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:01:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 07:01:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:01:34,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:34,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:34,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:01:34,554 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2007312204, now seen corresponding path program 1 times [2020-12-23 07:01:34,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:34,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678342144] [2020-12-23 07:01:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:34,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678342144] [2020-12-23 07:01:34,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087627765] [2020-12-23 07:01:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:01:34,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:34,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:34,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:01:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810600913] [2020-12-23 07:01:34,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:01:34,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:01:34,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:01:34,794 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-23 07:01:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:34,851 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-23 07:01:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:01:34,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-23 07:01:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:34,853 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:01:34,853 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:01:34,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:01:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:01:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 07:01:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:01:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 07:01:34,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-12-23 07:01:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:34,861 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 07:01:34,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:01:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 07:01:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:01:34,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:34,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:35,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:35,063 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1210846427, now seen corresponding path program 2 times [2020-12-23 07:01:35,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:35,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891534717] [2020-12-23 07:01:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:35,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891534717] [2020-12-23 07:01:35,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709417289] [2020-12-23 07:01:35,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:35,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:35,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:01:35,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:35,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:35,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:01:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11321366] [2020-12-23 07:01:35,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:01:35,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:01:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:01:35,317 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-12-23 07:01:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:35,400 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-23 07:01:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:01:35,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 07:01:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:35,402 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:01:35,402 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:01:35,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:01:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:01:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 07:01:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:01:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-23 07:01:35,415 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-12-23 07:01:35,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:35,415 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-23 07:01:35,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:01:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-23 07:01:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:01:35,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:35,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:35,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:35,617 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1114641236, now seen corresponding path program 3 times [2020-12-23 07:01:35,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:35,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265195130] [2020-12-23 07:01:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:35,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265195130] [2020-12-23 07:01:35,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83763535] [2020-12-23 07:01:35,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:35,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:01:35,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:01:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:01:35,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:35,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 07:01:35,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626507640] [2020-12-23 07:01:35,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:01:35,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:01:35,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:01:35,906 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-23 07:01:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:36,093 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-12-23 07:01:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:01:36,094 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-23 07:01:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:36,095 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:01:36,095 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:01:36,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:01:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:01:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-23 07:01:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:01:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 07:01:36,102 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2020-12-23 07:01:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:36,103 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 07:01:36,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:01:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 07:01:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:01:36,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:36,104 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:36,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:36,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1770911730, now seen corresponding path program 4 times [2020-12-23 07:01:36,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:36,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841969324] [2020-12-23 07:01:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:01:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841969324] [2020-12-23 07:01:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904952317] [2020-12-23 07:01:36,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:36,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:01:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:01:36,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:36,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 07:01:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628970148] [2020-12-23 07:01:36,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:01:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:01:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:01:36,616 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-12-23 07:01:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:36,714 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-23 07:01:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:01:36,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 07:01:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:36,715 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:01:36,715 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:01:36,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:01:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:01:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 07:01:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 07:01:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-12-23 07:01:36,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-12-23 07:01:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:36,723 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-12-23 07:01:36,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:01:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-12-23 07:01:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:01:36,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:36,724 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:36,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:36,939 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash -349754983, now seen corresponding path program 5 times [2020-12-23 07:01:36,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:36,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768029944] [2020-12-23 07:01:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:01:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768029944] [2020-12-23 07:01:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229274179] [2020-12-23 07:01:37,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:37,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:01:37,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:01:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:01:37,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:37,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2020-12-23 07:01:37,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340340229] [2020-12-23 07:01:37,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:01:37,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:37,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:01:37,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:01:37,344 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-12-23 07:01:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:37,499 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-12-23 07:01:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:01:37,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-12-23 07:01:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:37,503 INFO L225 Difference]: With dead ends: 43 [2020-12-23 07:01:37,503 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:01:37,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:01:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:01:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-23 07:01:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 07:01:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 07:01:37,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-12-23 07:01:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:37,525 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 07:01:37,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:01:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 07:01:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:01:37,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:37,527 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:37,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:37,731 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1837122194, now seen corresponding path program 6 times [2020-12-23 07:01:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:37,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836209315] [2020-12-23 07:01:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:01:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836209315] [2020-12-23 07:01:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098127294] [2020-12-23 07:01:37,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:38,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:01:38,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:38,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:01:38,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:01:38,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:38,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2020-12-23 07:01:38,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021185316] [2020-12-23 07:01:38,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:01:38,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:38,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:01:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:01:38,135 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 13 states. [2020-12-23 07:01:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:38,457 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-23 07:01:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:01:38,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-12-23 07:01:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:38,465 INFO L225 Difference]: With dead ends: 51 [2020-12-23 07:01:38,466 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:01:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:01:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:01:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-23 07:01:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 07:01:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 07:01:38,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2020-12-23 07:01:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:38,478 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 07:01:38,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:01:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 07:01:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:01:38,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:38,483 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:38,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:38,699 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:38,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1047213452, now seen corresponding path program 7 times [2020-12-23 07:01:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:38,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748856968] [2020-12-23 07:01:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:01:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748856968] [2020-12-23 07:01:38,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339771584] [2020-12-23 07:01:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:01:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:01:39,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:39,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 07:01:39,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758745562] [2020-12-23 07:01:39,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:01:39,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:01:39,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:01:39,045 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-12-23 07:01:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:39,202 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-12-23 07:01:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:01:39,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 07:01:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:39,203 INFO L225 Difference]: With dead ends: 55 [2020-12-23 07:01:39,203 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 07:01:39,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:01:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 07:01:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 07:01:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:01:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-23 07:01:39,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-12-23 07:01:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:39,211 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-23 07:01:39,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:01:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-23 07:01:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:01:39,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:39,212 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:39,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 07:01:39,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1365621147, now seen corresponding path program 8 times [2020-12-23 07:01:39,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:39,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120541580] [2020-12-23 07:01:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:01:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120541580] [2020-12-23 07:01:39,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129768098] [2020-12-23 07:01:39,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:39,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:39,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:39,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:01:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:01:39,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:39,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:01:39,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619675245] [2020-12-23 07:01:39,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:01:39,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:39,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:01:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:01:39,806 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2020-12-23 07:01:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:40,005 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-23 07:01:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:01:40,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-23 07:01:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:40,007 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:01:40,007 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 07:01:40,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:01:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 07:01:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-23 07:01:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:01:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-23 07:01:40,014 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 39 [2020-12-23 07:01:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:40,014 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-23 07:01:40,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:01:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-23 07:01:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:01:40,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:40,016 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:40,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 07:01:40,230 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1548494100, now seen corresponding path program 9 times [2020-12-23 07:01:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:40,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367287207] [2020-12-23 07:01:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 07:01:40,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367287207] [2020-12-23 07:01:40,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254213356] [2020-12-23 07:01:40,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:40,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:01:40,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:01:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 07:01:40,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:40,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2020-12-23 07:01:40,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059357072] [2020-12-23 07:01:40,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:01:40,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:01:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:01:40,703 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 17 states. [2020-12-23 07:01:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:41,298 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-23 07:01:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:01:41,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-12-23 07:01:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:41,299 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:01:41,299 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:01:41,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:01:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:01:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-23 07:01:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 07:01:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-23 07:01:41,308 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 42 [2020-12-23 07:01:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:41,308 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-23 07:01:41,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:01:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-23 07:01:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:01:41,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:41,309 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:41,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:41,524 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 516305714, now seen corresponding path program 10 times [2020-12-23 07:01:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:41,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547324582] [2020-12-23 07:01:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:01:41,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547324582] [2020-12-23 07:01:41,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88801326] [2020-12-23 07:01:41,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:41,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:41,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:41,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:01:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:01:41,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:41,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 07:01:41,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871146341] [2020-12-23 07:01:41,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:01:41,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:41,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:01:41,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:01:41,925 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 14 states. [2020-12-23 07:01:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:42,211 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-12-23 07:01:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:01:42,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-23 07:01:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:42,212 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:01:42,213 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:01:42,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:01:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:01:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-23 07:01:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 07:01:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-12-23 07:01:42,220 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 48 [2020-12-23 07:01:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-12-23 07:01:42,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:01:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-12-23 07:01:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 07:01:42,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:42,222 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:42,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:42,433 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash 530489305, now seen corresponding path program 11 times [2020-12-23 07:01:42,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:42,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142104224] [2020-12-23 07:01:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:01:42,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142104224] [2020-12-23 07:01:42,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971208898] [2020-12-23 07:01:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:44,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 07:01:44,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:01:44,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:01:44,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:44,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:01:44,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303806763] [2020-12-23 07:01:44,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:01:44,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:01:44,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:01:44,244 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 15 states. [2020-12-23 07:01:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:44,577 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-12-23 07:01:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:01:44,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-12-23 07:01:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:44,580 INFO L225 Difference]: With dead ends: 73 [2020-12-23 07:01:44,580 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:01:44,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:01:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:01:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-23 07:01:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 07:01:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-12-23 07:01:44,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 51 [2020-12-23 07:01:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:44,588 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-12-23 07:01:44,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:01:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-12-23 07:01:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:01:44,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:44,589 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:44,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:01:44,794 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2127913518, now seen corresponding path program 12 times [2020-12-23 07:01:44,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:44,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794343011] [2020-12-23 07:01:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 139 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:01:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794343011] [2020-12-23 07:01:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206481083] [2020-12-23 07:01:45,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:45,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 07:01:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:01:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 07:01:45,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:45,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-23 07:01:45,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197256275] [2020-12-23 07:01:45,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:01:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:01:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:01:45,527 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 21 states. [2020-12-23 07:01:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:46,474 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-23 07:01:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:01:46,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-12-23 07:01:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:46,475 INFO L225 Difference]: With dead ends: 81 [2020-12-23 07:01:46,475 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 07:01:46,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:01:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 07:01:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 07:01:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:01:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-23 07:01:46,483 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 54 [2020-12-23 07:01:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:46,483 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-23 07:01:46,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:01:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-23 07:01:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 07:01:46,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:46,485 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:46,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:01:46,700 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:46,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1675152436, now seen corresponding path program 13 times [2020-12-23 07:01:46,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:46,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439696320] [2020-12-23 07:01:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 191 proven. 260 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:01:47,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439696320] [2020-12-23 07:01:47,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186898555] [2020-12-23 07:01:47,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:47,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:01:47,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 191 proven. 260 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:01:47,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:47,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 07:01:47,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008242133] [2020-12-23 07:01:47,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:01:47,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:47,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:01:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:01:47,273 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 17 states. [2020-12-23 07:01:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:47,693 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-12-23 07:01:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:01:47,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-12-23 07:01:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:47,694 INFO L225 Difference]: With dead ends: 85 [2020-12-23 07:01:47,695 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:01:47,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:01:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:01:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 07:01:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 07:01:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-12-23 07:01:47,702 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 60 [2020-12-23 07:01:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:47,703 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-12-23 07:01:47,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:01:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-12-23 07:01:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 07:01:47,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:47,704 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 14, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:47,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:01:47,920 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1092061605, now seen corresponding path program 14 times [2020-12-23 07:01:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:47,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282319049] [2020-12-23 07:01:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:01:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282319049] [2020-12-23 07:01:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232972016] [2020-12-23 07:01:48,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:48,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:01:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:01:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:01:48,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:48,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:01:48,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729268259] [2020-12-23 07:01:48,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:01:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:01:48,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:01:48,400 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 18 states. [2020-12-23 07:01:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:48,911 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-12-23 07:01:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:01:48,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-12-23 07:01:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:48,913 INFO L225 Difference]: With dead ends: 88 [2020-12-23 07:01:48,913 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 07:01:48,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:01:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 07:01:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-23 07:01:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 07:01:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-12-23 07:01:48,920 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 63 [2020-12-23 07:01:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:48,921 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-12-23 07:01:48,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:01:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-12-23 07:01:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:01:48,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:48,922 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:49,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:49,127 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1563277612, now seen corresponding path program 15 times [2020-12-23 07:01:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:49,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114205387] [2020-12-23 07:01:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 219 proven. 345 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 07:01:49,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114205387] [2020-12-23 07:01:49,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374482416] [2020-12-23 07:01:49,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:49,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:01:49,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:01:49,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 07:01:49,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:49,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2020-12-23 07:01:49,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490095302] [2020-12-23 07:01:49,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:01:49,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:01:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:01:49,818 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 25 states. [2020-12-23 07:01:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:51,045 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-12-23 07:01:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:01:51,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-12-23 07:01:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:51,047 INFO L225 Difference]: With dead ends: 96 [2020-12-23 07:01:51,047 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:01:51,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:01:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:01:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 07:01:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 07:01:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-23 07:01:51,070 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 66 [2020-12-23 07:01:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:51,070 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-23 07:01:51,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:01:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-23 07:01:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 07:01:51,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:51,071 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 16, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:51,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:01:51,273 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1308926350, now seen corresponding path program 16 times [2020-12-23 07:01:51,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:51,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126542894] [2020-12-23 07:01:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 283 proven. 392 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 07:01:51,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126542894] [2020-12-23 07:01:51,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700566550] [2020-12-23 07:01:51,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:51,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:01:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 43 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:52,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:52,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 25 [2020-12-23 07:01:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037737696] [2020-12-23 07:01:52,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:01:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:01:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:01:52,056 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 25 states. [2020-12-23 07:01:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:53,083 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-12-23 07:01:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:01:53,084 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-12-23 07:01:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:53,085 INFO L225 Difference]: With dead ends: 115 [2020-12-23 07:01:53,085 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 07:01:53,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:01:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 07:01:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 07:01:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 07:01:53,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-12-23 07:01:53,092 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 72 [2020-12-23 07:01:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:53,093 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-12-23 07:01:53,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:01:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-12-23 07:01:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 07:01:53,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:53,094 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:53,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:53,307 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash 488216146, now seen corresponding path program 17 times [2020-12-23 07:01:53,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:53,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125758624] [2020-12-23 07:01:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 385 proven. 737 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 07:01:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125758624] [2020-12-23 07:01:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012911587] [2020-12-23 07:01:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:02,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 07:02:02,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:02,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 07:02:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 385 proven. 737 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 07:02:03,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:03,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 07:02:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967675446] [2020-12-23 07:02:03,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 07:02:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 07:02:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:02:03,584 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 26 states. [2020-12-23 07:02:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:04,787 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-12-23 07:02:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:02:04,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 90 [2020-12-23 07:02:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:04,789 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:02:04,789 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:02:04,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 23 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 07:02:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:02:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 07:02:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 07:02:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2020-12-23 07:02:04,796 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 90 [2020-12-23 07:02:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:04,796 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2020-12-23 07:02:04,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 07:02:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2020-12-23 07:02:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 07:02:04,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:04,797 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:05,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:05,002 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1202044359, now seen corresponding path program 18 times [2020-12-23 07:02:05,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:05,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978302445] [2020-12-23 07:02:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 402 proven. 805 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 07:02:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978302445] [2020-12-23 07:02:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868696958] [2020-12-23 07:02:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:06,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:02:06,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:02:06,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-23 07:02:06,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:06,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-23 07:02:06,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550087671] [2020-12-23 07:02:06,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:02:06,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:06,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:02:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:02:06,564 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 34 states. [2020-12-23 07:02:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:09,340 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2020-12-23 07:02:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:02:09,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2020-12-23 07:02:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:09,342 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:02:09,342 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 07:02:09,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:02:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 07:02:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 07:02:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 07:02:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-12-23 07:02:09,349 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 93 [2020-12-23 07:02:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:09,349 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-12-23 07:02:09,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:02:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-12-23 07:02:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 07:02:09,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:09,350 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 24, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:09,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:02:09,554 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1540324827, now seen corresponding path program 19 times [2020-12-23 07:02:09,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:09,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766475438] [2020-12-23 07:02:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 493 proven. 876 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:02:10,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766475438] [2020-12-23 07:02:10,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262441377] [2020-12-23 07:02:10,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 07:02:10,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 493 proven. 876 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:02:10,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:10,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:02:10,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704615773] [2020-12-23 07:02:10,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:02:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:02:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:02:10,454 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 28 states. [2020-12-23 07:02:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:11,648 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2020-12-23 07:02:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:02:11,648 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 99 [2020-12-23 07:02:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:11,649 INFO L225 Difference]: With dead ends: 130 [2020-12-23 07:02:11,649 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 07:02:11,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:02:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 07:02:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 07:02:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 07:02:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-12-23 07:02:11,655 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 99 [2020-12-23 07:02:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:11,655 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-12-23 07:02:11,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:02:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-12-23 07:02:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 07:02:11,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:11,656 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:11,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:11,871 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:11,872 INFO L82 PathProgramCache]: Analyzing trace with hash -446413356, now seen corresponding path program 20 times [2020-12-23 07:02:11,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:11,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137216670] [2020-12-23 07:02:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 513 proven. 950 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:02:12,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137216670] [2020-12-23 07:02:12,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382072096] [2020-12-23 07:02:12,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:12,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:02:12,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:12,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:02:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 513 proven. 950 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:02:12,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:12,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 07:02:12,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167928787] [2020-12-23 07:02:12,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:02:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:02:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:02:12,804 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 29 states. [2020-12-23 07:02:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:14,246 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2020-12-23 07:02:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 07:02:14,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 102 [2020-12-23 07:02:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:14,248 INFO L225 Difference]: With dead ends: 133 [2020-12-23 07:02:14,248 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 07:02:14,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:02:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 07:02:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 07:02:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:02:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-12-23 07:02:14,259 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 102 [2020-12-23 07:02:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:14,260 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-12-23 07:02:14,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:02:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-12-23 07:02:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 07:02:14,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:14,261 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:14,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:02:14,475 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:14,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1580683067, now seen corresponding path program 21 times [2020-12-23 07:02:14,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:14,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954757786] [2020-12-23 07:02:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 533 proven. 1027 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:02:15,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954757786] [2020-12-23 07:02:15,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990964331] [2020-12-23 07:02:15,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:15,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 07:02:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:02:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-23 07:02:15,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:15,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2020-12-23 07:02:15,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794836590] [2020-12-23 07:02:15,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 07:02:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 07:02:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:02:15,988 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 38 states. [2020-12-23 07:02:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:19,574 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-12-23 07:02:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:02:19,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2020-12-23 07:02:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:19,576 INFO L225 Difference]: With dead ends: 141 [2020-12-23 07:02:19,576 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 07:02:19,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=263, Invalid=4027, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:02:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 07:02:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-23 07:02:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 07:02:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-12-23 07:02:19,585 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 105 [2020-12-23 07:02:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:19,585 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-12-23 07:02:19,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 07:02:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-12-23 07:02:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 07:02:19,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:19,586 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:19,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:02:19,792 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash 292714265, now seen corresponding path program 22 times [2020-12-23 07:02:19,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:19,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211101578] [2020-12-23 07:02:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 636 proven. 1107 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 07:02:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211101578] [2020-12-23 07:02:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677973329] [2020-12-23 07:02:20,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:20,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:02:20,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:02:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 07:02:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:02:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 636 proven. 1107 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 07:02:20,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:02:20,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:02:20,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324384371] [2020-12-23 07:02:20,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:02:20,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:02:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:02:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:02:20,974 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 31 states. [2020-12-23 07:02:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:02:22,748 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2020-12-23 07:02:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:02:22,748 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 111 [2020-12-23 07:02:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:02:22,750 INFO L225 Difference]: With dead ends: 145 [2020-12-23 07:02:22,750 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 07:02:22,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:02:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 07:02:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-12-23 07:02:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 07:02:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2020-12-23 07:02:22,758 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 111 [2020-12-23 07:02:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:02:22,758 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2020-12-23 07:02:22,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:02:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2020-12-23 07:02:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 07:02:22,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:02:22,759 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:02:22,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:02:22,973 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:02:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:02:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1266282094, now seen corresponding path program 23 times [2020-12-23 07:02:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:02:22,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444560243] [2020-12-23 07:02:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:02:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:02:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 659 proven. 1190 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 07:02:23,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444560243] [2020-12-23 07:02:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356203155] [2020-12-23 07:02:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:32,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-23 07:03:32,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:03:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 593 proven. 1276 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 07:03:32,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:32,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 33 [2020-12-23 07:03:32,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450672625] [2020-12-23 07:03:32,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:03:32,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:32,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:03:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:03:32,381 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 33 states. [2020-12-23 07:03:34,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:34,254 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2020-12-23 07:03:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:03:34,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 114 [2020-12-23 07:03:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:34,256 INFO L225 Difference]: With dead ends: 151 [2020-12-23 07:03:34,256 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 07:03:34,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:03:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 07:03:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-12-23 07:03:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 07:03:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2020-12-23 07:03:34,264 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 114 [2020-12-23 07:03:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:34,264 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2020-12-23 07:03:34,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:03:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2020-12-23 07:03:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 07:03:34,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:34,265 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 30, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:34,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:03:34,466 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1679119410, now seen corresponding path program 24 times [2020-12-23 07:03:34,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:34,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198942147] [2020-12-23 07:03:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 705 proven. 1365 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 07:03:35,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198942147] [2020-12-23 07:03:35,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271451163] [2020-12-23 07:03:35,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:36,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 07:03:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:36,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:03:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-12-23 07:03:36,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:36,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2020-12-23 07:03:36,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383741743] [2020-12-23 07:03:36,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:03:36,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:03:36,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:03:36,855 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 43 states. [2020-12-23 07:03:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:41,361 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2020-12-23 07:03:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 07:03:41,362 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 120 [2020-12-23 07:03:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:41,363 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:03:41,363 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 07:03:41,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=301, Invalid=5249, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:03:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 07:03:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-12-23 07:03:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 07:03:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2020-12-23 07:03:41,372 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 120 [2020-12-23 07:03:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:41,372 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2020-12-23 07:03:41,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:03:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2020-12-23 07:03:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 07:03:41,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:41,373 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:41,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:41,577 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1446430612, now seen corresponding path program 25 times [2020-12-23 07:03:41,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:41,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928210319] [2020-12-23 07:03:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 823 proven. 1457 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:03:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928210319] [2020-12-23 07:03:42,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941912044] [2020-12-23 07:03:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:42,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:03:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 823 proven. 1457 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:03:42,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:42,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 07:03:42,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505646508] [2020-12-23 07:03:42,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 07:03:42,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:42,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 07:03:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:03:42,838 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 35 states. [2020-12-23 07:03:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:45,005 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2020-12-23 07:03:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 07:03:45,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 126 [2020-12-23 07:03:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:45,006 INFO L225 Difference]: With dead ends: 163 [2020-12-23 07:03:45,006 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 07:03:45,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 07:03:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 07:03:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-23 07:03:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 07:03:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2020-12-23 07:03:45,012 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 126 [2020-12-23 07:03:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:45,013 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2020-12-23 07:03:45,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 07:03:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2020-12-23 07:03:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 07:03:45,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:45,014 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:45,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 07:03:45,228 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 674089979, now seen corresponding path program 26 times [2020-12-23 07:03:45,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:45,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951645722] [2020-12-23 07:03:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 849 proven. 1552 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:03:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951645722] [2020-12-23 07:03:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950571025] [2020-12-23 07:03:46,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:46,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:03:46,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:03:46,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 849 proven. 1552 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:03:46,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:46,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:03:46,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768301217] [2020-12-23 07:03:46,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:03:46,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:03:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:03:46,592 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand 36 states. [2020-12-23 07:03:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:48,966 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2020-12-23 07:03:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:03:48,966 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2020-12-23 07:03:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:48,968 INFO L225 Difference]: With dead ends: 166 [2020-12-23 07:03:48,968 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 07:03:48,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:03:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 07:03:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-12-23 07:03:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 07:03:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2020-12-23 07:03:48,975 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 129 [2020-12-23 07:03:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:48,975 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2020-12-23 07:03:48,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:03:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2020-12-23 07:03:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 07:03:48,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:48,976 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 33, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:49,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:03:49,185 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 14096948, now seen corresponding path program 27 times [2020-12-23 07:03:49,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:49,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550337866] [2020-12-23 07:03:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 875 proven. 1650 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 07:03:50,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550337866] [2020-12-23 07:03:50,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205644109] [2020-12-23 07:03:50,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:50,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 07:03:50,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:50,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:03:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-12-23 07:03:51,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:51,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2020-12-23 07:03:51,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358691855] [2020-12-23 07:03:51,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 07:03:51,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 07:03:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 07:03:51,227 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 47 states. [2020-12-23 07:03:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:03:55,778 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2020-12-23 07:03:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:03:55,779 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 132 [2020-12-23 07:03:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:03:55,780 INFO L225 Difference]: With dead ends: 174 [2020-12-23 07:03:55,780 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 07:03:55,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=330, Invalid=6312, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:03:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 07:03:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-12-23 07:03:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 07:03:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2020-12-23 07:03:55,788 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 132 [2020-12-23 07:03:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:03:55,789 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2020-12-23 07:03:55,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 07:03:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2020-12-23 07:03:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 07:03:55,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:03:55,789 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 34, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:03:55,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:55,990 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:03:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:03:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash 111639762, now seen corresponding path program 28 times [2020-12-23 07:03:55,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:03:55,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069982547] [2020-12-23 07:03:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:03:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:03:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 1005 proven. 1751 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 07:03:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069982547] [2020-12-23 07:03:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8199925] [2020-12-23 07:03:57,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:03:57,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:03:57,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:03:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 07:03:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:03:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 213 proven. 2667 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:03:58,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:03:58,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 45] total 46 [2020-12-23 07:03:58,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011383763] [2020-12-23 07:03:58,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:03:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:03:58,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:03:58,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:03:58,078 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 46 states. [2020-12-23 07:04:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:04:02,025 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2020-12-23 07:04:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:04:02,026 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 138 [2020-12-23 07:04:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:04:02,027 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:04:02,028 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 07:04:02,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:04:02,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 07:04:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-23 07:04:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:04:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2020-12-23 07:04:02,036 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 138 [2020-12-23 07:04:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:04:02,037 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2020-12-23 07:04:02,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:04:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2020-12-23 07:04:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 07:04:02,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:04:02,038 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 43, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 07:04:02,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:04:02,252 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:04:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:04:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash -340437959, now seen corresponding path program 29 times [2020-12-23 07:04:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:04:02,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723101739] [2020-12-23 07:04:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:04:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:04:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 1266 proven. 2795 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 07:04:04,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723101739] [2020-12-23 07:04:04,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606667378] [2020-12-23 07:04:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true